@inproceedings{VishwakarmaBhattacharyyaSonietal.2024, author = {Vishwakarma, Devendra Kumar and Bhattacharyya, Suvanjan and Soni, Manoj Kumar and Ghosh, Soumya and Benim, Ali Cemal}, title = {Transition Flow Heat Transfer and Pressure Drop in a Uniformly Heated Inclined Solar Air Heater Fitted with Wavy Tapes}, series = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, volume = {1}, booktitle = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, editor = {Benim, Ali Cemal and Bennacer, Rachid and Mohamad, Abdulmajeed A. and Ocłoń, Paweł and Suh, Sang-Ho and Taler, Jan}, publisher = {Springer Nature}, address = {Cham}, isbn = {9783031672408}, issn = {2195-4356}, doi = {10.1007/978-3-031-67241-5_63}, pages = {703 -- 712}, year = {2024}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @inproceedings{BiswasMandalMannaetal.2024, author = {Biswas, Nirmalendu and Mandal, Dipak Kumar and Manna, Nirmal K. and Benim, Ali Cemal}, title = {Thermomagnetic Convection in a Hybrid Nanofluid-Filled Wavy-Walled Porous System with Protruded Bottom Heating}, series = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, volume = {2}, booktitle = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, publisher = {Springer Nature}, address = {Cham}, isbn = {9783031666087}, issn = {2195-4356}, doi = {10.1007/978-3-031-66609-4_35}, pages = {375 -- 385}, year = {2024}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{BiswasMandalMannaetal.2025, author = {Biswas, Nirmalendu and Mandal, Dipak Kumar and Manna, Nirmal K. and Benim, Ali Cemal}, title = {Thermomagnetic convection and entropy generation in a hybrid nanofluid filled wavy-walled cavity heated non-uniformly}, series = {Archives of Thermodynamics}, journal = {Archives of Thermodynamics}, publisher = {Polish Academy of Sciences}, issn = {1231-0956}, doi = {10.24425/ather.2025.154182}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-52344}, pages = {61 -- 81}, year = {2025}, abstract = {In this work, thermomagnetic convection and irreversibility production in a hybrid nanofluid-filled wavy-walled porous thermal system containing a semi-circular heated bottom is presented. Both the sidewalls of the enclosure are cooled and undulated with varying undulation numbers. The lower wall is partially undulated following a semi-circular-shaped object and is heated isothermally. The horizontal walls are insulated. The cavity is occupied with Cu-Al2O3/water-based hybrid nanofluid and porous substances under the impact of the evenly applied horizontal magnetic field. This work significantly contributes to the existing research rendering an exhaustive understanding of the hydrothermal flow-physics as well as irreversibility production of a hybrid nanofluid in the cavity having surface undulation. The Galerkin weighted finite element method is utilized to solve the mathematical model. The hydrothermal performance of the thermal system is considerably influenced by various pertinent factors such as Darcy-Rayleigh number, Darcy number, Hartmann number, and number of undulations. The wall undulations have a critical role in altering the hydrothermal performance. Heatlines are used to analyse heat transport dynamics from the protruded hot surface to the heat sink. The protruded heater wall induces the formation of a hot upward plume in the nearest fluid layers. The flow divides into two parts forming a pair of circulations due to symmetrical cooling at the sidewalls. The flow behaviours are significantly dampened by increasing the Hartmann number. The associated total entropy generation is also demonstrated. This study contributes to the existing domain knowledge and provides insights for designing and optimizing similar thermal systems.}, subject = {W{\"a}rme{\"u}bertragung}, language = {en} } @article{BhattacharyyaBenimPathaketal.2020, author = {Bhattacharyya, Suvanjan and Benim, Ali Cemal and Pathak, Manabendra and Chamoli, Sunil and Gupta, Ashutosh}, title = {Thermohydraulic characteristics of inline and staggered angular cut baffle inserts in the turbulent flow regime}, series = {Journal of Thermal Analysis and Calorimetry}, volume = {140}, journal = {Journal of Thermal Analysis and Calorimetry}, number = {3}, publisher = {Springer Nature}, issn = {1388-6150}, doi = {10.1007/s10973-019-09094-8}, pages = {1519 -- 1536}, year = {2020}, language = {en} } @article{SuhBenim1989, author = {Suh, S.-H. and Benim, Ali Cemal}, title = {The primitive variables formulation of the Navier-Stokes equations using the finite analytic method}, series = {Applied Mathematical Modelling}, volume = {13}, journal = {Applied Mathematical Modelling}, number = {9}, publisher = {Elsevier}, issn = {0307-904X}, doi = {10.1016/0307-904X(89)90066-8}, pages = {550 -- 554}, year = {1989}, subject = {Navier-Stokes-Gleichung}, language = {en} } @article{FarooqAliBenim2018, author = {Farooq, Asma and Ali, Ramzan and Benim, Ali Cemal}, title = {Soret and Dufour effects on three dimensional Oldroyd-B fluid}, series = {Physica A: Statistical Mechanics and its Applications}, volume = {503}, journal = {Physica A: Statistical Mechanics and its Applications}, publisher = {Elsevier}, issn = {0378-4371}, doi = {10.1016/j.physa.2018.02.204}, pages = {345 -- 354}, year = {2018}, language = {en} } @article{MandalBoseBiswasetal.2024, author = {Mandal, Dipak Kumar and Bose, Sharmistha and Biswas, Nirmalendu and Manna, Nirmal K. and Cuce, Erdem and Benim, Ali Cemal}, title = {Solar Chimney Power Plants for Sustainable Air Quality Management Integrating Photocatalysis and Particulate Filtration: A Comprehensive Review}, series = {Sustainability}, volume = {16}, journal = {Sustainability}, number = {6}, publisher = {MDPI}, issn = {2071-1050}, doi = {10.3390/su16062334}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-45814}, pages = {31}, year = {2024}, abstract = {Urban air pollution has become a pressing challenge in recent times, demanding innovative solutions. This review delves into the potential of Solar Chimney Power Plants (SCPPs) as a sustainable approach to mitigating air pollution. The idea of mitigation of pollution may be an added advantage to the use of SCPPs in practice. Recent advancements, such as the integration of photocatalytic reactors (PCRs) for the elimination of greenhouse gases (GHGs), emphasizing the importance of addressing non-CO2 GHGs like CH4 and N2O are analyzed. The novelty of this review is that it not only focuses on the shifting and removal of particulate matter but also on the removal of greenhouse gases. Numerous case studies, ranging from filter-equipped SCPPs to Solar-Assisted Large-Scale Cleaning Systems (SALSCSs), are reviewed, providing a comprehensive understanding of their design, performance, and potential benefits. This review serves as a guide for researchers and policymakers, emphasizing the need for multifaceted approaches to address the intricate nexus of air pollution, renewable energy generation, and climate change mitigation.}, subject = {Luftverschmutzung}, language = {en} } @article{BenimStegelitzEpple2005, author = {Benim, Ali Cemal and Stegelitz, P. and Epple, Bernd}, title = {Simulation of the two-phase flow in a laboratory coal pulveriser}, series = {Forschung im Ingenieurwesen}, volume = {69}, journal = {Forschung im Ingenieurwesen}, number = {4}, publisher = {Springer Nature}, issn = {0015-7899}, doi = {10.1007/s10010-005-0002-4}, pages = {197 -- 204}, year = {2005}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{BenimDiederich2019, author = {Benim, Ali Cemal and Diederich, Michael}, title = {Prediction of Roughness Effects on Wind Turbine Aerodynamics}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912809004}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27775}, year = {2019}, language = {en} } @article{BenimPfeiffelmann2019, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn}, title = {Prediction of hydrogen flame propagation in a channel with exit contraction}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, number = {01013}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912801013}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27806}, year = {2019}, language = {en} } @article{BaşaranBenimYurddas2019, author = {Ba{\c{s}}aran, An{\i}l and Benim, Ali Cemal and Yurddas, Ali}, title = {Prediction of heat and fluid flow in microchannel condensation}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912801015}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27768}, year = {2019}, language = {en} } @article{BenimDiederichNahavandi2019, author = {Benim, Ali Cemal and Diederich, Michael and Nahavandi, Ali}, title = {Prediction of flow and dispersion in cross-ventilated buildings}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, organization = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912805002}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27785}, year = {2019}, language = {en} } @article{BenimPfeiffelmann2019, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn}, title = {Prediction of burning velocity and quenching distance of hydrogen flames}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912801012}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27790}, year = {2019}, language = {en} } @article{BenimDiederichGuel2018, author = {Benim, Ali Cemal and Diederich, Michael and G{\"u}l, Fethi}, title = {Prediction and measurement of the aerodynamic performance of a wind turbine}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824004001}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27925}, year = {2018}, language = {en} } @article{SulaimanAdhamHasanetal.2024, author = {Sulaiman, Mohammed A. and Adham, Ahmed M. and Hasan, Hasan F. and Benim, Ali Cemal and Anjal, Hassan A.}, title = {Performance analysis of novel dew point evaporative cooler with shell and tube design through different air-water flow configurations}, series = {Energy}, volume = {289}, journal = {Energy}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2023.129922}, pages = {14}, year = {2024}, subject = {Verdunstungsk{\"u}hlung}, language = {en} } @article{MandalGuptaBiswasetal.2025, author = {Mandal, Dipak Kumar and Gupta, Kritesh Kumar and Biswas, Nirmalendu and Manna, Nirmal K. and Santra, Somnath and Benim, Ali Cemal}, title = {Optimization of hybrid solar chimney power plants (HSCPPs): A review of multi-objective approaches}, series = {Applied Energy}, volume = {396}, journal = {Applied Energy}, publisher = {Elsevier}, issn = {0306-2619}, doi = {10.1016/j.apenergy.2025.126214}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-54199}, pages = {25}, year = {2025}, subject = {Erneuerbare Energien}, language = {en} } @article{PfeiffelmannBenim2018, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal}, title = {Numerical study of the quenching of a laminar premixed hydrogen flame}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001031}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27976}, year = {2018}, language = {en} } @incollection{CanalBenim2025, author = {Canal, Cansu Deniz and Benim, Ali Cemal}, title = {Numerical Study of Co-Firing in Swirl Burner Using Coal-Biomass Blends}, series = {Mathematical Theory and Simulation of Scientific Problems: FIAM-2023, Dubai, UAE, December 21-22}, volume = {Springer Proceedings in Mathematics \& Statistics, Bd. 487}, booktitle = {Mathematical Theory and Simulation of Scientific Problems: FIAM-2023, Dubai, UAE, December 21-22}, editor = {Sharma, Rajesh Kumar and Srivastava, Shailesh Kumar and Benim, Ali Cemal}, publisher = {Springer Nature}, address = {Singapore}, isbn = {9789819625789}, issn = {2194-1009}, doi = {10.1007/978-981-96-2579-6_3}, pages = {21 -- 32}, year = {2025}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{ShahzadGulistanAlietal.2020, author = {Shahzad, Azeem and Gulistan, Uzma and Ali, Ramzan and Iqbal, Azhar and Benim, Ali Cemal and Kamran, Muhammad and Khan, Salah Ud-Din and Khan, Shahab Ud-Din and Farooq, Aamir}, title = {Numerical Study of Axisymmetric Flow and Heat Transfer in a Liquid Film over an Unsteady Radially Stretching Surface}, series = {Mathematical Problems in Engineering}, volume = {2020}, journal = {Mathematical Problems in Engineering}, publisher = {Hindawi}, doi = {10.1155/2020/6737243}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27755}, pages = {1 -- 9}, year = {2020}, language = {en} } @article{BaşaranBenimYurddas2021, author = {Ba{\c{s}}aran, An{\i}l and Benim, Ali Cemal and Yurddas, Ali}, title = {Numerical Simulation of the Condensation Flow of the Isobutane (R600a) inside Microchannel}, series = {Heat Transfer Engineering}, volume = {43}, journal = {Heat Transfer Engineering}, number = {3-5}, publisher = {Taylor \& Francis}, issn = {0145-7632}, doi = {10.1080/01457632.2021.1874668}, pages = {337 -- 361}, year = {2021}, language = {en} } @inproceedings{SaeedrashedSachdevaSinghetal.2024, author = {Saeedrashed, Younis and Sachdeva, Aryaman and Singh, Srijna and Benim, Ali Cemal}, title = {Numerical Simulation of Cavitation Characteristics on Stepped Spillway Due to Different Geometry Configuration}, series = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, volume = {2}, booktitle = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, publisher = {Springer Nature}, address = {Cham}, isbn = {9783031666087}, issn = {2195-4356}, doi = {10.1007/978-3-031-66609-4_66}, pages = {715 -- 725}, year = {2024}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{KimSchnellScheffknechtetal.2007, author = {Kim, Ju Pyo and Schnell, Uwe and Scheffknecht, G{\"u}nter and Benim, Ali Cemal}, title = {Numerical modelling of MILD combustion for coal}, series = {Progress in Computational Fluid Dynamics}, volume = {7}, journal = {Progress in Computational Fluid Dynamics}, number = {6}, publisher = {Inderscience Publishers}, issn = {1468-4349}, doi = {10.1504/PCFD.2007.014683}, year = {2007}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{TaymazAslanBenim2015, author = {Taymaz, Imdat and Aslan, Erman and Benim, Ali Cemal}, title = {Numerical investigation of incompressible fluid flow and heat transfer across a bluff body in a channel flow}, series = {Thermal Science}, volume = {19}, journal = {Thermal Science}, number = {2}, publisher = {doiSerbia}, doi = {10.2298/tsci120220145t}, pages = {537 -- 547}, year = {2015}, language = {en} } @article{Benim2021, author = {Benim, Ali Cemal}, title = {Numerical Calculation of Sink Velocities for Helminth Eggs in Water}, series = {Computation}, volume = {9}, journal = {Computation}, number = {12}, publisher = {MDPI}, issn = {2079-3197}, doi = {10.3390/computation9120136}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-37318}, year = {2021}, abstract = {The settling velocities of helminth eggs of three types, namely Ascaris suum (ASC), Trichuris suis (TRI), and Oesophagostomum spp. (OES), in clean tap water are computationally determined by means of computational fluid dynamics, using the general-purpose CFD software ANSYS Fluent 18.0. The previous measurements of other authors are taken as the basis for the problem formulation and validation, whereby the latter is performed by comparing the predicted sink velocities with those measured in an Owen tube. To enable a computational treatment, the measured shapes of the eggs are parametrized by idealizing them in terms of elementary geometric forms. As the egg shapes show a variation within each class, "mean" shapes are considered. The sink velocities are obtained through the computationally obtained drag coefficients. The latter are defined by means of steady-state calculations. Predicted sink velocities are compared with the measured ones. It is observed that the calculated values show a better agreement with the measurements, for ASC and TRI, compared to the theoretical sink values delivered by the Stokes theory. However, the observed agreement is still found not to be very satisfactory, indicating the role of further parameters, such as the uncertainties in the characterization of egg shapes or flocculation effects even in clean tap water.}, language = {en} } @article{BenimIqbalJoosetal.2016, author = {Benim, Ali Cemal and Iqbal, Sohail and Joos, Franz and Wiedermann, Alexander}, title = {Numerical Analysis of Turbulent Combustion in a Model Swirl Gas Turbine Combustor}, series = {Journal of Combustion}, volume = {2016}, journal = {Journal of Combustion}, publisher = {Hindawi}, issn = {2090-1968}, doi = {10.1155/2016/2572035}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-28044}, pages = {1 -- 12}, year = {2016}, language = {en} } @inproceedings{YalcınkayaDurmazTepeetal.2024, author = {Yal{\c{c}}{\i}nkaya, Orhan and Durmaz, Ufuk and Tepe, Ahmet {\"U}mit and Benim, Ali Cemal and Uysal, {\"U}nal}, title = {Numerical Analysis of Roughened Target Surface for Enhancing Jet Impingement Cooling}, series = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, volume = {1}, booktitle = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, publisher = {Springer Nature}, address = {Cham}, isbn = {9783031672408}, issn = {2195-4356}, doi = {10.1007/978-3-031-67241-5_64}, pages = {713 -- 720}, year = {2024}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{PfeiffelmannBenimJoos2018, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {Numerical analysis of liquid jet impingement cooling of a thermoelectric generator}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001032}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27988}, year = {2018}, language = {en} } @article{IqbalPfeiffelmannBenimetal.2018, author = {Iqbal, Sohail and Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {Numerical analysis of lifted hydrogen flame}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824001014}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27950}, year = {2018}, language = {en} } @article{BenimEppleKrohmer2005, author = {Benim, Ali Cemal and Epple, B. and Krohmer, B.}, title = {Modelling of pulverised coal combustion by a Eulerian-Eulerian two-phase flow formulation}, series = {Progress in Computational Fluid Dynamics, An International Journal}, volume = {5}, journal = {Progress in Computational Fluid Dynamics, An International Journal}, number = {6}, publisher = {inderscience}, doi = {10.1504/pcfd.2005.007067}, pages = {345}, year = {2005}, language = {en} } @article{BiswasMandalMannaetal.2022, author = {Biswas, Nirmalendu and Mandal, Dipak Kumar and Manna, Nirmal K. and Benim, Ali Cemal}, title = {Magneto-hydrothermal triple-convection in a W-shaped porous cavity containing oxytactic bacteria}, series = {scientific reports}, volume = {12}, journal = {scientific reports}, publisher = {Springer Nature}, issn = {2045-2322}, doi = {10.1038/s41598-022-18401-7}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-40041}, year = {2022}, abstract = {Bioconvective heat and mass transport phenomena have recently been the subject of interest in diverse fields of applications pertaining to the motion of fluids and their thermophysical properties. The transport processes in a system involving triple convective phenomena, irregular geometry, and boundary conditions constitute a complex phenomenon. This work aims to explore the mixed thermo-bioconvection of magnetically susceptible fluid containing copper nanoparticles and oxytactic bacteria in a novel W-shaped porous cavity. The buoyant convention is generated due to the isothermal heating at the wavy bottom wall, whereas the mixed convection is induced due to the shearing motion of the top-cooled sliding wall. Furthermore, the bioconvection is induced due to the manifestation of oxytactic bacteria or organisms. The inclined sidewalls are insulated. The geometry is packed with water based Cu nanoparticle mixed porous structure, which is subjected to a magnetizing field acted horizontally. The complex transport equations are transformed into nondimensional forms, which are then computed using the finite volume-based developed code. The coupled triple-convective flow physics are explored for a wide range of involved controlling parameters, which could provide helpful insight to the system designer for its proper operation. The shape of geometry can be considered one of the important parameters to control the heat and mass transport phenomena. In general, the influence of amplitude (δ) is more compared to the waviness number (m) of the undulations. The magnitude of heat (Nu) and mass (Sh) transfer rate for the W-shaped cavity is high compared to conventional square and trapezoidal-shaped cavities. The output of the analysis could be very helpful for the designer for modeling devices operating on nanotechnology-based bioconvection, microbial fuel cells, and others.}, language = {en} } @article{SulaimanSaberHasanetal.2026, author = {Sulaiman, Mohammed A. and Saber, Hindren Ali and Hasan, Hasan F. and Benim, Ali Cemal}, title = {Latent heat cold storage integrated direct evaporative cooler: A neoteric practical design for energy and water saving potential with thermal comfort improvement}, series = {Journal of Energy Storage}, volume = {143}, journal = {Journal of Energy Storage}, publisher = {Elsevier}, issn = {2352-152X}, doi = {10.1016/j.est.2025.119612}, pages = {20}, year = {2026}, subject = {Latentw{\"a}rmespeicher}, language = {en} } @article{BenimSyedKhawarJ1998, author = {Benim, Ali Cemal and Syed, Khawar, J.,}, title = {Laminar flamelet modelling of turbulent premixed combustion}, series = {Applied Mathematical Modelling}, volume = {22}, journal = {Applied Mathematical Modelling}, number = {1-2}, publisher = {Elsevier}, doi = {10.1016/s0307-904x(98)00012-2}, pages = {113 -- 136}, year = {1998}, language = {en} } @article{BenimSyed1998, author = {Benim, Ali Cemal and Syed, Khawar J.}, title = {Laminar flamelet modelling of turbulent premixed combustion}, series = {Applied Mathematical Modelling}, volume = {22}, journal = {Applied Mathematical Modelling}, number = {1-2}, publisher = {Elsevier}, issn = {0307-904X}, doi = {10.1016/S0307-904X(98)00012-2}, pages = {113 -- 136}, year = {1998}, subject = {Verbrennung}, language = {en} } @inproceedings{BenimCicek2022, author = {Benim, Ali Cemal and {\c{C}}i{\c{c}}ek, Ayd{\i}n}, title = {Investigation of the Thermohydraulics of an EGS Project in Turkey: Comparative Assessment of Water and CO2 as Heat Transfer Fluid}, series = {Proceedings of CONV-22: Int. Symp. on Convective Heat and Mass Transfer June 5 - 10, 2022, Turkey}, booktitle = {Proceedings of CONV-22: Int. Symp. on Convective Heat and Mass Transfer June 5 - 10, 2022, Turkey}, publisher = {Begellhouse}, doi = {10.1615/ICHMT.2022.CONV22.580}, pages = {439 -- 446}, year = {2022}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{MabroukBenimNajietal.2023, author = {Mabrouk, Riheb and Benim, Ali Cemal and Naji, Hassane and Dhahri, Hacen}, title = {Investigation of Pulsed Flow Effects on the Phase Change Within an Open-Cell Metal Foam Using Thermal Lattice Boltzmann Method}, series = {Transport in Porous Media}, volume = {147}, journal = {Transport in Porous Media}, number = {2}, publisher = {Springer Nature}, issn = {0169-3913}, doi = {10.1007/s11242-023-01903-x}, pages = {225 -- 257}, year = {2023}, language = {en} } @article{AslanTaymazBenim2015, author = {Aslan, Erman and Taymaz, Imdat and Benim, Ali Cemal}, title = {Investigation of LBM curved boundary treatments for unsteady flows}, series = {European Journal of Mechanics - B/Fluids}, volume = {51}, journal = {European Journal of Mechanics - B/Fluids}, publisher = {Elsevier}, doi = {10.1016/j.euromechflu.2015.01.004}, pages = {68 -- 74}, year = {2015}, language = {en} } @article{BhattacharyyaChattopadhyayGuinetal.2019, author = {Bhattacharyya, Suvanjan and Chattopadhyay, Himadri and Guin, Anindya and Benim, Ali Cemal}, title = {Investigation of Inclined Turbulators for Heat Transfer Enhancement in a Solar Air Heater}, series = {Heat Transfer Engineering}, volume = {40}, journal = {Heat Transfer Engineering}, number = {17/18}, publisher = {Taylor \& Francis}, doi = {10.1080/01457632.2018.1474593}, pages = {1451 -- 1460}, year = {2019}, language = {en} } @incollection{DenizCanalDiederichKaracayetal.2025, author = {Deniz Canal, Cansu and Diederich, Michael and Karacay, Onur and Benim, Ali Cemal and Hamberger, Andreas and Heese, Markus and Schr{\"a}der, K. H.}, title = {Investigation of Boiler Efficiency Improvements via Enthalpy Wheel with Application to a Biomass Boiler}, series = {Mathematical Theory and Simulation of Scientific Problems: FIAM-2023, Dubai, UAE, December 21-22}, volume = {Springer Proceedings in Mathematics \& Statistics, Bd. 487}, booktitle = {Mathematical Theory and Simulation of Scientific Problems: FIAM-2023, Dubai, UAE, December 21-22}, editor = {Sharma, Rajesh Kumar and Srivastava, Shailesh Kumar and Benim, Ali Cemal}, publisher = {Springer Nature}, address = {Singapore}, isbn = {9789819625789}, issn = {2194-1009}, doi = {10.1007/978-981-96-2579-6_13}, pages = {189 -- 200}, year = {2025}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{BenimZinserSchnell1989, author = {Benim, Ali Cemal and Zinser, Walter and Schnell, Uwe}, title = {Investigation into the finite element analysis of enclosed turbulent diffusion flames}, series = {Applied Mathematical Modelling}, volume = {13}, journal = {Applied Mathematical Modelling}, number = {5}, publisher = {Elsevier}, issn = {0307-904X}, doi = {10.1016/0307-904X(89)90069-3}, pages = {258 -- 267}, year = {1989}, subject = {Finite-Elemente-Methode}, language = {en} } @article{BenimZinser1985, author = {Benim, Ali Cemal and Zinser, Walter}, title = {Investigation into the finite element analysis of confined turbulent flows using a κ-ε model of turbulence}, series = {Computer Methods in Applied Mechanics and Engineering}, volume = {51}, journal = {Computer Methods in Applied Mechanics and Engineering}, number = {1-3}, publisher = {Elsevier}, issn = {0045-7825}, doi = {10.1016/0045-7825(85)90045-3}, pages = {507 -- 523}, year = {1985}, subject = {Finite-Elemente-Methode}, language = {en} } @article{BenimPasqualotto1998, author = {Benim, Ali Cemal and Pasqualotto, E.}, title = {Investigation into the computational modelling of diesel engine side injection systems}, series = {International Journal of Computer Applications in Technology}, volume = {11}, journal = {International Journal of Computer Applications in Technology}, number = {3-5}, publisher = {Inderscience}, issn = {0952-8091}, doi = {10.1504/IJCAT.1998.062199}, pages = {211 -- 218}, year = {1998}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{Benim2024, author = {Benim, Ali Cemal}, title = {Investigation into the Computational Analysis of High-Speed Microjet Hydrogen-Air Diffusion Flames}, series = {Fire}, volume = {7}, journal = {Fire}, number = {9}, publisher = {MDPI}, issn = {2571-6255}, doi = {10.3390/fire7090314}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46345}, pages = {23}, year = {2024}, abstract = {High-speed microjet hydrogen-air diffusion flames are investigated computationally. The focus is on the prediction of the so-called bottleneck phenomenon. The latter has been previously observed as a specific feature of the present flame class and has not yet been investigated computationally. In the configuration under consideration, the nozzle diameter is 0.5 mm and six cases with mean nozzle injection velocities (U) between 306 m/s and 561 m/s are considered. The flow in the nozzle lance is analyzed separately to obtain detailed inlet boundary conditions for the flame calculations. It is confirmed by calculation that the phenomenon is mainly determined by the transition to turbulence in the initial parts of the free jet. The transitional turbulence proves to be the biggest challenge in predicting this class of flames, as the generally available turbulence and turbulent combustion models reach the limits of their validity in transitional flows. In a Reynolds-Averaged Numerical Simulation framework, the Shear Stress Transport model is found to perform better than alternative two-equation models and is used as the turbulence model. By neglecting the interactions between the turbulence and chemistry (no-model approach), it is possible to predict the morphology of the bottleneck flame and its dependence on U qualitatively. However, the position of the bottleneck is overpredicted for U \< 561 m/s. The experimental flames in the considered U range are all attached to the nozzle. This is also predicted by the no-model approach. The Eddy Dissipation Concept (EDC) used as the turbulence combustion model predicts, however, lifted flames (with increasing lift-off height as U decreases). With the EDC, no bottleneck morphology is observed for U = 561 m/s. For lower U, the EDC results for the bottleneck position are generally closer to the measurements. It is demonstrated that accuracy in predicting the bottleneck position can be improved by ad hoc modifications of the turbulent viscosity.}, subject = {Turbulenzmodell}, language = {en} } @article{Benim2022, author = {Benim, Ali Cemal}, title = {Introducing the "Mathematical Modelling and Numerical Simulation of Combustion and Fire" Section of the Journal Fire}, series = {fire}, volume = {5}, journal = {fire}, number = {6}, publisher = {MDPI}, issn = {2571-6255}, doi = {10.3390/fire5060178}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-40257}, year = {2022}, language = {en} } @article{SenthurAnandRameshKumaretal.2022, author = {Senthur, N.S. and Anand, C and Ramesh Kumar, M and Elumalai, P.V. and Shajahan, Mohamed Iqbal and Benim, Ali Cemal and Nasr, Emad Abouel and Hussein, H.M.A. and Parthasarathy, M.}, title = {Influence of cobalt chromium nanoparticles in homogeneous charge compression ignition engine operated with citronella oil}, series = {Energy Science \& Engineering}, volume = {10}, journal = {Energy Science \& Engineering}, number = {4}, publisher = {Wiley}, issn = {2050-0505}, doi = {10.1002/ese3.1088}, pages = {1251 -- 1263}, year = {2022}, language = {en} } @article{SidharthRajkumarChithrakumaretal.2022, author = {Sidharth, K. Pillai and Rajkumar, Mattacaud R. and Chithrakumar, V. K. and Asirvatham, Godson L. and Benim, Ali Cemal and Wogwises, Somchai}, title = {Impact of increased outer wall rotation on convection in a vertical annulus with a stationary heated inner cylinder}, series = {Heat Transfer}, volume = {51}, journal = {Heat Transfer}, number = {7}, publisher = {Wiley}, issn = {2688-4534}, doi = {10.1002/htj.22617}, pages = {6656 -- 6684}, year = {2022}, abstract = {The interplay of centrifugal and buoyant forces on convective heat transfer in a vertical annulus formed by rotating adiabatic outer cylinder and stationary heated inner cylinder has been experimentally and numerically investigated. Experiments were performed for rotational speeds corresponding to the rotation parameter ζ in the range of 527 ≤ ζ ≤ 2860, maintaining the heat flux of the heated stationary inner cylinder as 80 W/m2, for radius ratio (η) and aspect ratio of the vertical annulus being 0.614 and 0.052, respectively. The problem was investigated numerically using the commercial computational fluid dynamics package, ANSYS CFX. The numerical methodology has been validated by comparing the numerically predicted average surface Nusselt number with experimentally obtained values. The comparison revealed an enhancement of the thermal performance of the heated stationary inner cylinder in the range 527 ≤ ζ ≤ 1190 due to the increase in turbulence intensity towards the heated inner cylinder. However, when the rotation parameter was increased further in the range 1190 ≤ ζ ≤ 2860, the thermal performance of the stationary heated inner cylinder showed only marginal improvement. The aforementioned thermal behavior of the inner heated stationary cylinder has been explored based on the flow statistics gathered from the numerical simulations.}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{MandalBiswasMannaetal.2024, author = {Mandal, Dipak Kumar and Biswas, Nirmalendu and Manna, Nirmal K and Benim, Ali Cemal}, title = {Impact of chimney divergence and sloped absorber on energy efficacy of a solar chimney power plant (SCPP)}, series = {Ain Shams Engineering Journal}, journal = {Ain Shams Engineering Journal}, publisher = {Elsevier}, issn = {2090-4495}, doi = {10.1016/j.asej.2023.102390}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-42410}, year = {2024}, abstract = {A numerical study is carried out meticulously to scrutinize the impact of different shapes of chimneys like circular (outer dia, dc), convergent (outer dia, 0.5dc), divergent (outer dia, 1.5dc), sudden contraction (outer dia, 0.5dc), and sudden expansion (outer dia, 1.5dc) on the performance of an SCPP. Furthermore, the parametric impact with different chimney divergence angles (CDA, ϕ), and ground absorber slope angle (GSA, γ) on the SCPP performance is also scrutinized. Optimum divergence angle (ϕ=+0.75◦) enhances the power generation up to ~ 47\% (76 kW) with a horizontal ground absorber surface. An increase or decrease in CDA lessens the power generation. With a sloped ground absorber angle γ=0.6◦, the gain in power generation is 60\% (82 kW). The study of combination of ground sloped absorber (γ=0.6◦) and divergent chimney (ϕ=+0.75◦) shows enhancement of the power generation upto 80\% (92 kW) more than the classical Manzaranes plant.}, language = {en} } @article{MaqablehAmmourahKhadrawietal.2012, author = {Maqableh, A. M. and Ammourah, S. A. and Khadrawi, A. F. and Al-Nimr, M. A. and Benim, Ali Cemal}, title = {Hydrodynamics behaviour of a fluid flow in micro-venturi}, series = {Candian Journal of Physics}, volume = {90}, journal = {Candian Journal of Physics}, number = {1}, publisher = {Canadian Science Publishing}, organization = {Canadian Science Publishing}, doi = {10.1139/p11-145}, pages = {83 -- 89}, year = {2012}, language = {en} } @article{MaqablehKhadrawiNimretal.2011, author = {Maqableh, A. M. and Khadrawi, A. F. and Nimr, M. AlA. and Ammourah, S. A. and Benim, Ali Cemal}, title = {Heat transfer characteristics of parallel and counter flow micro-channel heat exchangers with varying wall resistance}, series = {Progress in Computational Fluid Dynamics, An International Journal}, volume = {11}, journal = {Progress in Computational Fluid Dynamics, An International Journal}, number = {5}, publisher = {inderscience}, doi = {10.1504/pcfd.2011.042183}, pages = {318}, year = {2011}, language = {en} } @inproceedings{BhattacharyyaJainBhattetal.2024, author = {Bhattacharyya, Suvanjan and Jain, Naman and Bhatt, Tapasvi and Ghosh, Soumya and Benim, Ali Cemal}, title = {Heat Transfer Augmentation in a Mini-channel Using Magnetic Nanofluid and Magnetic Vortex}, series = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, volume = {2}, booktitle = {Advances in Computational Heat and Mass Transfer: Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, publisher = {Springer Nature}, address = {Cham}, isbn = {9783031666087}, issn = {2195-4356}, doi = {10.1007/978-3-031-66609-4_1}, pages = {3 -- 11}, year = {2024}, subject = {W{\"a}rme{\"u}bertragung}, language = {en} } @article{BhattacharyyaChattopadhyayBanerjeeetal.2018, author = {Bhattacharyya, Suvanjan and Chattopadhyay, Himadri and Banerjee, Arnab and Benim, Ali Cemal}, title = {Heat transfer and flow field in a circular twisted channel}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, doi = {10.1051/matecconf/201824001005}, year = {2018}, language = {en} } @article{YalcınkayaDurmazTepeetal.2024, author = {Yal{\c{c}}{\i}nkaya, Orhan and Durmaz, Ufuk and Tepe, Ahmet {\"U}mit and Benim, Ali Cemal and Uysal, {\"U}nal}, title = {Heat and Flow Characteristics of Aerofoil-Shaped Fins on a Curved Target Surface in a Confined Channel for an Impinging Jet Array}, series = {Energies}, volume = {17}, journal = {Energies}, number = {5}, publisher = {MDPI}, issn = {1996-1073}, doi = {10.3390/en17051238}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46387}, pages = {21}, year = {2024}, abstract = {The main purpose of this investigation was to explore the heat transfer and flow characteristics of aero-foil-shaped fins combined with extended jet holes, specifically focusing on their feasibility in cooling turbine blades. In this study, a comprehensive investigation was carried out by applying impinging jet array cooling (IJAC) on a semi-circular curved surface, which was roughened using aerofoil-shaped fins. Numerical computations were conducted under three different Reynolds numbers (Re) ranging from 5000 to 25,000, while nozzle-to-target surface spacings (S/d) ranged from 0.5 to 8.0. Furthermore, an assessment was made of the impact of different fin arrangements, single-row (L1), double-row (L2), and triple-row (L3), on convective heat transfer. Detailed examinations were performed on area-averaged and local Nusselt (Nu) numbers, flow properties, and the thermal performance criterion (TPC) on finned and smooth target surfaces. The study's results revealed that the use of aerofoil-shaped fins and the reduction in S/d, along with surface roughening, led to significant increases in the local and area-averaged Nu numbers compared to the conventional IJAC scheme. The most notable heat transfer enhancement was observed at S/d = 0.5 utilizing extended jets and the surface design incorporating aerofoil-shaped fins. Under these specific conditions, the maximum heat transfer enhancement reached 52.81\%. Moreover, the investigation also demonstrated that the highest TPC on the finned surface was achieved when S/d = 2.0 for L2 at Re = 25,000, resulting in a TPC value of 1.12. Furthermore, reducing S/d and mounting aerofoil-shaped fins on the surface yielded a more uniform heat transfer distribution on the relevant surface than IJAC with a smooth surface, ensuring a relatively more uniform heat transfer distribution to minimize the risk of localized overheating.}, subject = {Beschaufelung}, language = {en} } @article{ShajahanBenim2026, author = {Shajahan, Mohamed Iqbal and Benim, Ali Cemal}, title = {Granular PCM based heat sink for electronics thermal management}, series = {Applied Thermal Engineering}, volume = {286}, journal = {Applied Thermal Engineering}, publisher = {Elsevier}, issn = {1359-4311}, doi = {10.1016/j.applthermaleng.2025.129336}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-59649}, year = {2026}, abstract = {This study investigates aluminum heat sinks integrated with GR42 phase change material (PCM), aiming to enhance thermal inertia and stabilize device temperatures. This is important, since the increasing miniaturization and performance demands for electronic devices have led in a growing need for advanced thermal management systems capable of handling rapid transient loads. The novelty of the work lies in examining different heat sink layouts that optimize the heat dissipation capabilities of GR42 PCMs while minimizing size and weight for electronic cooling. The experimental testing was conducted using three configurations, namely no fin, circular fin and hexagonal fin, with three input powers (4 W, 8 W, and 12 W). The experimental results show that the hexagonal-fin heat sink, surface area is 25 \% more than circular fins, exhibited superior thermal performance without significant variation in input power. Notably, the hexagonal-fin heat sink achieved the desired set point temperature of 55 ◦C in 33 \% less time than the circular-fin design and 45 \% less time than the heat sink without fins. Furthermore, the peak temperatures increased up to 21 \% for circular fins. During the charging cycles, the enhancement ratios vary from 72 \% and begin to narrow to 25 \% during discharge cycles. The hexagonal-fin configuration also exhibited superior melting dynamics, completing the phase transition 44 \% faster at higher input power than the circular fins, and established a thermal deviation of nearly 51 \% less than finless heat sinks. These findings underscore the critical role of fin geometry and PCM integration in achieving uniform temperature distribution and improved energy storage efficiency. Overall, the hexagonal-fin heat sink with GR42 PCM shows strong potential as a passive cooling solution for low-power portable electronic devices.}, language = {en} } @article{RueckertIbrarAhmedetal.2024, author = {R{\"u}ckert, Frank Ulrich and Ibrar, Burhan and Ahmed, Arslan and Allweyer, Benjamin and H{\"u}bner, Dirk and Klinger, Friedrich and Knaus, Hermann and Benim, Ali Cemal}, title = {Fluid flow and heat transfer of a novel passive cooling system for gearless wind turbines with a power range of 3-12 MW}, series = {Energy}, volume = {312}, journal = {Energy}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2024.133478}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46594}, year = {2024}, abstract = {Today, the gearless horizontal axis wind turbines are mainstream in wind energy industry. High demands of electric power led to bigger systems and active cooling reduces the overall efficiency of the turbines. Passive cooling systems have been examined for the first time for a gearless wind energy generator with power range of 3-12 MW. With further developed heat conductors, it is possible to operate a wind generator in a larger power class with passive cooling components. This is accompanied by enormous cost savings due to elimination of costs for active cooling elements such as the use of fans, pumps, and heat exchangers. An additional factor is the significant reduction in necessary maintenance due to the minimized incidence of corrosion and wear. Design of the cooling fins and an ideal position of the generator within the housing of the wind turbine has been objectives. Mandatory is that maximum temperatures of the generator fins should stay under 155 °C, which could be reached with several designs for different heat exchanger geometries.}, subject = {Windturbine}, language = {en} } @article{Benim1989, author = {Benim, Ali Cemal}, title = {Finite element solution of an enclosed turbulent diffusion flame}, series = {International Journal for Numerical Methods in Fluids}, volume = {9}, journal = {International Journal for Numerical Methods in Fluids}, number = {3}, publisher = {Wiley}, issn = {0271-2091}, doi = {10.1002/fld.1650090305}, pages = {289 -- 303}, year = {1989}, abstract = {A finite element formulation of enclosed turbulent diffusion flames is presented. A primitive variables approach is preferred in the analysis. A mixed interpolation is employed for the velocity and pressure. In the solution of the Navier-Stokes equations, a segregated formulation is adopted, where the pressure discretization equation is obtained directly from the discretized continuity equation, considering the velocity-pressure relationships in the discretized momentum equations. The state of turbulence is defined by a κ-ϵ model. Near solid boundaries, a wall function approach is employed. The combustion rates are estimated using the eddy dissipation concept. The expensive direct treatment of the integrodifferential equations of radiation is avoided by employing the moment method, which allows the derivation of an approximate local field equation for the radiation intensity. The proposed finite element model is verified by investigating a technical turbulent diffusion flame of semi-industrial size, and comparing the results with experiments and finite difference predictions.}, subject = {Finite-Elemente-Methode}, language = {en} } @article{Benim1990, author = {Benim, Ali Cemal}, title = {Finite element analysis of confined turbulent swirling flows}, series = {International Journal for Numerical Methods in Fluids}, volume = {11}, journal = {International Journal for Numerical Methods in Fluids}, number = {6}, publisher = {Wiley}, issn = {0271-2091}, doi = {10.1002/fld.1650110602}, pages = {697 -- 717}, year = {1990}, abstract = {The finite element method is applied to incompressible and statistically steady confined turbulent swirling flows. A velocity-pressure formulation is employed. The momentum and continuity equations are solved using a segregated algorithm. Two turbulence models, namely the standard κ-ε model and the algebraic stress model, are considered. It is shown that the algebraic stress model leads to significantly more accurate results in swirling flows compared to the κ-ε model. A novel way of implementing the algebraic stress model is presented in which the stresses are coupled to the Navier-Stokes equations in such a way that they 'correct' the effective viscosity hypothesis. This formulation seems to provide a convenient approach for finite elements. In deriving the discretization equations, a streamline-upwind/Petrov-Galerkin method is employed. Comparisons performed between various upwind schemes show that the numerical solution may be substantially affected by the particular upwind procedure used. The analysis is extended to the prediction of particle motion in turbulent swirling flow fields. Here the fluid turbulence is modelled adopting a stochastic approach. The influence of turbulence modelling on particle movement is investigated.}, subject = {Finite-Elemente-Methode}, language = {en} } @article{BiswasMandalBoseetal.2023, author = {Biswas, Nirmalendu and Mandal, Dipak Kumar and Bose, Sharmistha and Manna, Nirmal K. and Benim, Ali Cemal}, title = {Experimental Treatment of Solar Chimney Power Plant — A Comprehensive Review}, series = {Energies}, volume = {16}, journal = {Energies}, number = {17}, publisher = {MDPI}, issn = {1996-1073}, doi = {10.3390/en16176134}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46139}, pages = {41}, year = {2023}, abstract = {Solar chimney power plants (SCPPs) are encouraging sustainable energy sources due to their low cost, abundance, low maintenance, and eco-friendliness. However, despite significant efforts to optimize SCPP design, their efficiency and power generation capabilities remain limited. Researchers have explored modifications in plant geometry and hybridization to improve efficiency. Despite extensive work in this area, commercialization of SCPPs has not yet been achieved. Most of the research is numerical and may differ from real-world practical use. The number of experimental studies is also relatively small. To facilitate commercialization, further investigation with practical and feasible dimensions is required. This comprehensive review paper aims to provide an in-depth analysis of experimental approaches and advancements in the field of SCPPs. The paper begins with an introduction, highlighting the background, significance, and objectives of the review. It provides an overview of the plants, discussing their principles and operation as innovative renewable energy systems. The historical development and evolution of solar chimneys are explored, shedding light on their progression over time. Case studies of operational hybrid SCPPs are examined to showcase real-world applications and performance. The paper also addresses environmental impacts and sustainability considerations associated with SCPPs. Furthermore, recommendations for future research and development in this field are provided to guide researchers and industry professionals. This study focuses on the possibility of commercialization of both standalone and hybrid SCPPs.}, subject = {Erneuerbare Energien}, language = {en} } @article{BhattacharyyaBenimChattopadhyayetal.2019, author = {Bhattacharyya, Suvanjan and Benim, Ali Cemal and Chattopadhyay, Himadri and Banerjee, Arnab}, title = {Experimental investigation of heat transfer performance of corrugated tube with spring tape inserts}, series = {Experimental Heat Transfer}, volume = {32}, journal = {Experimental Heat Transfer}, number = {5}, publisher = {Taylor \& Francis}, issn = {0891-6152}, doi = {10.1080/08916152.2018.1531955}, pages = {411 -- 425}, year = {2019}, language = {en} } @article{SulaimanSaberHasanetal.2025, author = {Sulaiman, Mohammed A. and Saber, Hindren Ali and Hasan, Hasan F. and Benim, Ali Cemal}, title = {Experimental and numerical investigation of novel dew-point evaporative cooler with shell and tube design}, series = {Energy}, volume = {317}, journal = {Energy}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2025.134686}, year = {2025}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @unpublished{SulaimanSaberHasanetal.2024, author = {Sulaiman, Mohammed Abdulqader and Saber, Hindren Ali and Hasan, Hasan Fahmi and Benim, Ali Cemal}, title = {Experimental and Numerical Investigation of Novel Dew-Point Evaporative Cooler with Shell and Tube Design}, series = {SSRN}, journal = {SSRN}, publisher = {Elsevier}, doi = {10.2139/ssrn.4980477}, pages = {38}, year = {2024}, abstract = {Implementing a neoteric practical design for dew-point evaporative cooler (DPEC) rather than the widely utilized flat plate and corrugated plate has been challenging since the first invention. Thus far, no study has been dedicated to design and experimentally implement a shell and tube concept for DPEC with an innovative configuration that can contribute in mass production, globalization, and effortless maintenance of such a high performance cooling machine. Therefore, in this paper, the shell and tube concept has been employed as a core design for DPEC that has been reinforced by a practical approaches. The practical approaches include a dedicated novel design for the proposed system and utilizing super cheap materials for the system's construction. Both of the aforementioned approaches provide solutions for overcoming the aforementioned issues. In the meanwhile, the superiority of the proposed DPEC has been approved by comparing it to the flat plate DPEC. During the experimentations, the prototype was able to reduce the ambient temperature by up to 34.1°C (from 53°C to 18.9°C), besides, it could achieve a dew-point effectiveness of 99.6\% and wet-bulb effectiveness of 135\%.}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{BenimEscudierNahavandietal.2010, author = {Benim, Ali Cemal and Escudier, Marcel and Nahavandi, Ali and Nickson, A. K. and Syed, Khawar J. and Joos, Franz}, title = {Experimental and numerical investigation of isothermal flow in an idealized swirl combustor}, series = {International Journal of Numerical Methods for Heat \& Fluid Flow}, volume = {20}, journal = {International Journal of Numerical Methods for Heat \& Fluid Flow}, number = {3}, publisher = {Emerald}, doi = {10.1108/09615531011024084}, pages = {348 -- 370}, year = {2010}, language = {en} } @article{IqbalBenimFischeretal.2016, author = {Iqbal, Sohail and Benim, Ali Cemal and Fischer, S. and Joos, F. and Kluβ, D. and Wiedermann, Alexander}, title = {Experimental and numerical analysis of natural bio and syngas swirl flames in a model gas turbine combustor}, series = {Journal of Thermal Science}, volume = {25}, journal = {Journal of Thermal Science}, number = {5}, publisher = {Springer}, doi = {10.1007/s11630-016-0885-4}, pages = {460 -- 469}, year = {2016}, language = {en} } @article{MandalMannaBiswasetal.2026, author = {Mandal, Dipak Kumar and Manna, Nirmal K. and Biswas, Nirmalendu and Rudra, Tansu and Kumar, Rajesh and Benim, Ali Cemal}, title = {Enhanced heat transport in magneto-nanofluidic thermal systems: adiabatic block effects in grooved channels and ANN modeling}, series = {International Journal of Thermofluids}, volume = {31}, journal = {International Journal of Thermofluids}, publisher = {Elsevier}, issn = {2666-2027}, doi = {10.1016/j.ijft.2025.101515}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-60127}, year = {2026}, abstract = {This study investigates heat transfer enhancement in magneto-nanofluidic systems through the strategic placement of adiabatic blocks in grooved channels. Using CuO-H2O nanofluid in a bottom-heated channel with circular expansion, we examine the complex interactions between forced convection, magnetic fields, and uoyancy effects. Through systematic numerical analysis, we explore the combined influences of Rayleigh, Reynolds, and Hartmann numbers on thermal performance. Our findings reveal significant heat transfer enhancement (up to 137 \%) under optimal conditions, particularly with vertical magnetic field orientation at Re = 100 and Ha = 30. The results demonstrate how adiabatic blocks modify flow structures, with larger blocks diminishing vortex intensity while elevated Ra generates secondary vortices that interact with primary circulations. Magnetic field effects show notable dependence on orientation, with vertical fields generally promoting better heat transfer than horizontal configurations. To complement the numerical analysis, we develop a predictive model using Artificial Neural Network (ANN) for Nusselt numbers across various operating conditions, achieving over 99 \% accuracy. The integrated computational-ANN approach offers significant advancements in optimizing thermal systems in various areas, ranging from electronics cooling to microfluidic devices.}, language = {en} } @article{BiswasMandalMannaetal.2023, author = {Biswas, Nirmalendu and Mandal, Dipak Kumar and Manna, Nirmal K. and Benim, Ali Cemal}, title = {Enhanced energy and mass transport dynamics in a thermo-magneto-bioconvective porous system containing oxytactic bacteria and nanoparticles: cleaner energy application}, series = {Energy}, volume = {263}, journal = {Energy}, number = {B}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2022.125775}, year = {2023}, language = {en} } @article{BhattacharyyaBhattVishwakarmaetal.2024, author = {Bhattacharyya, Suvanjan and Bhatt, Tapasvi and Vishwakarma, Devendra Kumar and Benim, Ali Cemal and Abraham, John}, title = {Effect of mechanical vibration and its influence on thermal performance of a nanofluid heat exchanger}, series = {Numerical Heat Transfer: An International Journal of Computation and Methodology, Part A: Applications}, journal = {Numerical Heat Transfer: An International Journal of Computation and Methodology, Part A: Applications}, publisher = {Informa}, issn = {1040-7782}, doi = {10.1080/10407782.2024.2331589}, pages = {1 -- 24}, year = {2024}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{XiaSmithBenimetal.1997, author = {Xia, Jiliang and Smith, Brian L. and Benim, Ali Cemal and Schmidli, Jiirg and Yadigaroglu, George}, title = {Effect of inlet and outlet boundary conditions on swirling flows}, series = {Computers \& Fluids}, volume = {26}, journal = {Computers \& Fluids}, number = {8}, publisher = {Elsevier}, issn = {0045-7930}, doi = {10.1016/S0045-7930(97)00026-1}, pages = {811 -- 823}, year = {1997}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{AichBarghaviBenim2025, author = {Aich, Rishav and Barghavi, Devarakonda and Benim, Ali Cemal}, title = {Effect of hydrodynamic and thermal anisotropy on convective heat transfer in a fluid saturated porous duct: A finite volume approach}, series = {Numerical Heat Transfer: An International Journal of Computation and Methodology, Part A: Applications}, journal = {Numerical Heat Transfer: An International Journal of Computation and Methodology, Part A: Applications}, publisher = {Taylor \& Francis}, issn = {1521-0634}, doi = {10.1080/10407782.2025.2527971}, pages = {22}, year = {2025}, subject = {Numerische Str{\"o}mungssimulation}, language = {de} } @article{BaşaranBenim2024, author = {Ba{\c{s}}aran, An{\i}l and Benim, Ali Cemal}, title = {Development of Correlations Based on CFD Study for Microchannel Condensation Flow of Environmentally Friendly Hydrocarbon Refrigerants}, series = {Energies}, volume = {17}, journal = {Energies}, number = {7}, publisher = {MDPI}, issn = {1996-1073}, doi = {10.3390/en17071531}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46398}, pages = {21}, year = {2024}, abstract = {A CFD simulation of the condensation flow of R600a and R290 within microchannels was conducted to explore the effect of mass flux, hydraulic diameter, and vapour quality on heat transfer rate and pressure drop. Data obtained from CFD simulations were used to develop new heat transfer and pressure drop correlations for the condensation flows of R600a and R290, which are climate-friendly refrigerants. Steady-state numerical simulations of condensation flow of refrigerants were carried out inside a single circular microchannel with diameters varying between 0.2 and 0.6 mm. The volume of fluid approach was used in the proposed model, calculating the interface phase change using the Lee model. The CFD simulation model was validated via a comparison of the simulation results with the experimental data available in the literature. It is found that the newly developed Nu number correlation shows a deviation, with an Ave-MAE of 11.16\%, compared to those obtained by CFD simulation. Similarly, the deviation between friction factors obtained by the newly proposed correlation and those obtained by CFD simulation is 20.81\% Ave-MAE. Widely recognized correlations that are applicable to the condensation of refrigerants within small-scale channels were also evaluated by comparing newly developed correlations. It is concluded that the newly proposed correlation has a higher accuracy in predicting the heat transfer coefficient and pressure drop. This situation can contribute to the creation of a sustainable system via the use of microchannels and climate-friendly refrigerants, like R600a and R290.}, subject = {Druckabfall}, language = {en} } @article{EblingKrummPfeiffelmannetal.2016, author = {Ebling, Dirk and Krumm, A. and Pfeiffelmann, Bj{\"o}rn and Gottschald, J. and Bruchmann, J. and Benim, Ali Cemal and Adam, Mario and Labs, R. and Herbertz, R. R. and Stunz, A.}, title = {Development of a System for Thermoelectric Heat Recovery from Stationary Industrial Processes}, series = {Journal of Electronic Materials}, volume = {45}, journal = {Journal of Electronic Materials}, number = {7}, publisher = {Springer}, doi = {10.1007/s11664-016-4511-8}, pages = {3433 -- 3439}, year = {2016}, language = {de} } @inproceedings{RueckertBurhanAhmedetal.2024, author = {R{\"u}ckert, Frank Ulrich and Burhan, Ibrar and Ahmed, Arslan and H{\"u}bner, Dirk and Allweyer, Benjamin and Klinger, Friedrich and Benim, Ali Cemal}, title = {Development of a Passive Cooling System for a Gearless Wind Energy Generator}, series = {Advances in Computational Heat and Mass Transfer Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, volume = {1}, booktitle = {Advances in Computational Heat and Mass Transfer Proceedings of the 14th International Conference on Computational Heat and Mass Transfer (ICCHMT 2023), 4-8 September, 2023, D{\"u}sseldorf, Germany}, publisher = {Springer Nature}, address = {Cham}, isbn = {9783031672408}, issn = {2195-4356}, doi = {10.1007/978-3-031-67241-5_30}, pages = {333 -- 343}, year = {2024}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{BaşaranBenim2024, author = {Ba{\c{s}}aran, An{\i}l and Benim, Ali Cemal}, title = {Condensation Flow of Refrigerants Inside Mini and Microchannels: A Review}, series = {Applied Sciences}, volume = {14}, journal = {Applied Sciences}, number = {7}, publisher = {MDPI}, issn = {2076-3417}, doi = {10.3390/app14072988}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-46358}, year = {2024}, abstract = {Nowadays, the demand for obtaining high heat flux values in small volumes has increased with the development of technology. Condensing flow inside mini- and microchannels has been becoming a promising solution for refrigeration, HVAC, air-conditioning, heat pumps, heat pipes, and electronic cooling applications. In these applications, employing mini/microchannels in the condenser design results in the working fluid, generally refrigerant, undergoing a phase change inside the mini/microchannels. On the other hand, the reduction in the hydraulic diameter during condensation gives rise to different flow regimes and heat transfer mechanisms in the mini- and microchannels compared to the conventional channels. Therefore, the understanding of fluid flow and heat transfer characteristics during condensation of refrigerant inside mini- and microchannels has been gaining importance in terms of condenser design. This study presents a state-of-the-art review of condensation studies on refrigerants inside mini- and microchannels. The review includes experimental studies as well as correlation models, which are developed to predict condensation heat transfer coefficients and pressure drop. The refrigerant type, thermodynamical performance, and compatibility, as well as the environmental effects of refrigerant, play a decisive role in the design of refrigeration systems. Therefore, the environmental impacts of refrigerants and current regulations against them are also discussed in the present review.}, subject = {Kondensation}, language = {en} } @article{BenimOzkanCaganetal.2007, author = {Benim, Ali Cemal and Ozkan, K. and Cagan, M. and Gunes, D.}, title = {Computational investigation of turbulent jet impinging onto rotating disk}, series = {International Journal of Numerical Methods for Heat \& Fluid Flow}, volume = {17}, journal = {International Journal of Numerical Methods for Heat \& Fluid Flow}, number = {3}, publisher = {Emerald}, doi = {10.1108/09615530710730157}, pages = {284 -- 301}, year = {2007}, language = {en} } @article{BenimBrillertCagan2004, author = {Benim, Ali Cemal and Brillert, Dieter and Cagan, Markos}, title = {Computational investigation of the flow in pre-swirl stator-rotor systems}, series = {International Journal of Computational Methods}, volume = {1}, journal = {International Journal of Computational Methods}, number = {2}, publisher = {World Scientific}, issn = {0219-8762}, doi = {10.1142/S0219876204000125}, pages = {329 -- 343}, year = {2004}, abstract = {A 3D computational analysis has been applied to investigate direct transfer, pre-swirl systems for gas turbine cooling. Alternative computational procedures have been applied and results have been compared with measurements. Based on these validation studies, strategies for modeling such systems have been proposed. Present results suggest that sufficiently accurate predictions can be obtained using a quasi-steady analysis applying the "frozen rotor" approach for treating the interface between the stationary and rotating domains.}, subject = {Gasturbine}, language = {en} } @article{BenimCanalBoke2022, author = {Benim, Ali Cemal and Canal, Cansu Deniz and Boke, Yakup Erhan}, title = {Computational investigation of oxy-combustion of pulverized coal and biomass in a swirl burner}, series = {Energy}, volume = {238}, journal = {Energy}, number = {C}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2021.121852}, year = {2022}, language = {en} } @article{BenimKorucu2023, author = {Benim, Ali Cemal and Korucu, Ayse}, title = {Computational investigation of non-premixed hydrogen-air laminar flames}, series = {International Journal of Hydrogen Energy}, volume = {48}, journal = {International Journal of Hydrogen Energy}, number = {38}, publisher = {Elsevier}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2022.12.248}, pages = {14492 -- 14510}, year = {2023}, subject = {Wasserstoff}, language = {en} } @article{PfeiffelmannBenimJoos2021, author = {Pfeiffelmann, Bj{\"o}rn and Benim, Ali Cemal and Joos, Franz}, title = {Computational Investigation of Impingement Cooling of Thermoelectric Generators}, series = {Heat Transfer Engineering}, volume = {42}, journal = {Heat Transfer Engineering}, number = {3-4}, publisher = {Taylor \& Francis}, issn = {0145-7632}, doi = {10.1080/01457632.2019.1699296}, pages = {282 -- 295}, year = {2021}, language = {en} } @article{BenimFrankAssmannetal.2019, author = {Benim, Ali Cemal and Frank, Thiemo and Assmann, Alexander and Lichtenberg, Artur and Akhyari, Payam}, title = {Computational investigation of hemodynamics in hardshell venous reservoirs: A comparative study}, series = {Artificial Organs}, volume = {44}, journal = {Artificial Organs}, number = {4}, publisher = {Wiley}, issn = {1525-1594}, doi = {10.1111/aor.13593}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-29070}, pages = {411 -- 418}, year = {2019}, abstract = {Extracorporeal circulation using heart-lung-machines is associated with a profound activation of corpuscular and plasmatic components of circulating blood, which can also lead to deleterious events such as systemic inflammatory response and hemolysis. Individual components used to install the extracorporeal circulation have an impact on the level of activation, most predominantly membrane oxygenators and hardshell venous reservoirs as used in extracorporeal systems. The blood flows in two different hardshell reservoirs are computationally investigated. A special emphasis is placed on the prediction of an onset of transition and turbulence generation. Reynolds-averaged numerical simulations (RANS) based on a transitional turbulence model, as well as large eddy simulations (LES) are applied to achieve an accurate prediction. In the LES analysis, the non-Newtonian behavior of the blood is considered via the Carreau model. Blood damage potential is quantified applying the Modified Index of Hemolysis (MIH) based on the predicted flow fields. The results indicate that the flows in both reservoirs remain predominantly laminar. For one of the reservoirs, considerable turbulence generation is observed near the exit site, caused by the specific design for the connection with the drainage tube. This difference causes the MIH of this reservoir to be nearly twice as large as compared to the alternative design. However, a substantial improvement of these performance criteria can be expected by a local geometry modification.}, language = {en} } @article{BhattacharyyaChattopadhyayBenim2017, author = {Bhattacharyya, Suvanjan and Chattopadhyay, Himadri and Benim, Ali Cemal}, title = {Computational investigation of heat transfer enhancement by alternating inclined ribs in tubular heat exchanger}, series = {Progress in Computational Fluid Dynamics}, volume = {17}, journal = {Progress in Computational Fluid Dynamics}, number = {6}, publisher = {Inderscience Enterprises Limited}, issn = {1468-4349}, doi = {10.1504/PCFD.2017.088818}, pages = {390 -- 396}, year = {2017}, language = {en} } @article{BenimPfeiffelmannOcłońetal.2019, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn and Ocłoń, Paweł and Taler, Jan}, title = {Computational investigation of a lifted hydrogen flame with LES and FGM}, series = {Energy}, volume = {173}, journal = {Energy}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2019.02.133}, pages = {1172 -- 1181}, year = {2019}, language = {en} } @article{AliFarooqShahzadetal.2022, author = {Ali, Ramzan and Farooq, A. and Shahzad, A. and Benim, Ali Cemal and Iqbal, A. and Razzaq, M.}, title = {Computational approach on three-dimensional flow of couple-stress fluid with convective boundary conditions}, series = {Physica A: Statistical Mechanics and its Applications}, volume = {553}, journal = {Physica A: Statistical Mechanics and its Applications}, publisher = {Elsevier}, issn = {0378-4371}, doi = {10.1016/j.physa.2019.124056}, year = {2022}, language = {en} } @article{BenimDiederichGueletal.2018, author = {Benim, Ali Cemal and Diederich, Michael and G{\"u}l, Fethi and Oclon, Pawel and Taler, Jan}, title = {Computational and experimental investigation of the aerodynamics and aeroacoustics of a small wind turbine with quasi-3D optimization}, series = {Energy Conversion and Management}, volume = {177}, journal = {Energy Conversion and Management}, publisher = {Elsevier}, doi = {10.1016/j.enconman.2018.09.042}, pages = {143 -- 149}, year = {2018}, language = {en} } @inproceedings{OezmanGuelDiederichetal.2022, author = {{\"O}zman, Cansu and G{\"u}l, Fethi and Diederich, Michael and Benim, Ali Cemal and Janoske, Uwe}, title = {Computational and Experimental Investigation of Flow and Convective Heat Transfer along Rough Surfaces}, series = {Proceedings of CONV-22: Int. Symp. on Convective Heat and Mass Transfer June 5 - 10, 2022, Turkey}, booktitle = {Proceedings of CONV-22: Int. Symp. on Convective Heat and Mass Transfer June 5 - 10, 2022, Turkey}, publisher = {Begellhouse}, doi = {10.1615/ICHMT.2022.CONV22.590}, pages = {447 -- 454}, year = {2022}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{PfeiffelmannDiederichGueletal.2020, author = {Pfeiffelmann, Bj{\"o}rn and Diederich, Michael and G{\"u}l, Fethi and Benim, Ali Cemal and Heese, Markus and Hamberger, Andreas}, title = {Computational and Experimental Investigation of an Industrial Biomass Furnace}, series = {Chemical Engineering \& Technology}, volume = {43}, journal = {Chemical Engineering \& Technology}, number = {8}, publisher = {Wiley}, issn = {1521-4125}, doi = {10.1002/ceat.201900637}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27747}, pages = {1538 -- 1546}, year = {2020}, language = {en} } @article{BenimCaganGuenes2004, author = {Benim, Ali Cemal and Cagan, Markos and G{\"u}nes, Dogan}, title = {Computational analysis of transient heat transfer in turbulent pipe flow}, series = {International Journal of Thermal Sciences}, volume = {43}, journal = {International Journal of Thermal Sciences}, number = {8}, publisher = {Elsevier}, issn = {1290-0729}, doi = {https://doi.org/10.1016/j.ijthermalsci.2004.02.012}, pages = {725 -- 732}, year = {2004}, subject = {Turbulenzmodell}, language = {en} } @article{DenizCanalBokeAydinetal.2021, author = {Deniz Canal, Cansu and Boke, Yakup Erhan and Aydin, Ozer and Benim, Ali Cemal}, title = {COMPUTATIONAL ANALYSIS OF PULVERIZED COAL CO-FIRING WITH BIOMASS IN 150MWe UNIT OF TUNCBILEK THERMAL POWER PLANT}, series = {Isi Bilimi ve Teknigi Dergisi - Journal of Thermal Science and Technology}, volume = {41}, journal = {Isi Bilimi ve Teknigi Dergisi - Journal of Thermal Science and Technology}, number = {1}, publisher = {Turkish Society for Thermal Sciences \& Technology}, issn = {1300-3615}, doi = {10.47480/isibted.979314}, pages = {37 -- 50}, year = {2021}, language = {en} } @article{BenimEscudierNahavandietal.2011, author = {Benim, Ali Cemal and Escudier, M. P. and Nahavandi, A. and Nickson, A. K. and Syed, Khawar J. and Joos, F.}, title = {Computational analysis of incompressible turbulent flow in an idealised swirl combustor}, series = {Progess in Computational Fluid Dynamics, An International Journal}, volume = {11}, journal = {Progess in Computational Fluid Dynamics, An International Journal}, number = {1}, publisher = {inderscience}, doi = {10.1504/pcfd.2011.037571}, pages = {42 -- 45}, year = {2011}, language = {en} } @article{SShajahanRetal.2026, author = {S, Kasiviswanathan and Shajahan, Mohamed Iqbal and R, Bharathiraja and Murali, Arun Prasad and Benim, Ali Cemal}, title = {Comprehensive overview of phase change materials in electronics, building, and solar applications}, series = {Engineering Research Express}, volume = {8}, journal = {Engineering Research Express}, number = {3}, publisher = {IOP Publishing}, issn = {2631-8695}, doi = {10.1088/2631-8695/ae342a}, year = {2026}, abstract = {Phase change materials (PCMs) are a viable way to improve energy efficiency and thermal control in a variety of sectors. With an emphasis on their function in thermal control, this review article offers an in-depth review of PCM applications in electronics, buildings and solar energy systems. PCMs are used in electronics to control device temperatures, which lowers the risk of overheating and increases operational efficiency by 10\% to 25\%. Through latent heat storage and release in reaction to temperature changes, PCMs are incorporated into walls, floors, and roofs in building applications to improve thermal comfort and cut energy use by 15\% to 30\%. By storing thermal energy for steady power generation, PCMs increase the dependability and efficiency of solar energy systems by 8\%-20\%. This review examines the basic ideas behind PCMs, assesses various PCM (such as organic, inorganic, and eutectic PCMs), and details about real-world applications in these energy management fields. Important issues are examined, such as material compatibility, cost-effectiveness, and long-term stability. In order to maximize performance in these crucial applications, the conclusion emphasizes the need for improvements in cost-effective PCM formulations for the improved thermal conductivity (0.2-0.7 W m-1·K-1), and adaptive control systems.}, subject = {Energieeffizienz}, language = {en} } @article{BenimPfeiffelmann2020, author = {Benim, Ali Cemal and Pfeiffelmann, Bj{\"o}rn}, title = {Comparison of Combustion Models for Lifted Hydrogen Flames within RANS Framework}, series = {Energies}, volume = {13}, journal = {Energies}, number = {1}, publisher = {MDPI}, issn = {1996-1073}, doi = {10.3390/en13010152}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27727}, pages = {152}, year = {2020}, language = {en} } @article{BenimCicek2023, author = {Benim, Ali Cemal and {\c{C}}i{\c{c}}ek, Ayd{\i}n}, title = {Comparative analysis of water and carbon dioxide injection for the thermohydraulics of an EGS project in Dikili Geothermal Field, T{\"u}rkiye}, series = {Bulletin Of The Mineral Research and Exploration}, volume = {171}, journal = {Bulletin Of The Mineral Research and Exploration}, publisher = {Maden Tetkik ve Arama Genel M{\"u}d{\"u}rl{\"u}ğ{\"u}}, issn = {0026-4563}, doi = {10.19111/bulletinofmre.1288731}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-49115}, pages = {91 -- 105}, year = {2023}, abstract = {A comparative numerical analysis of the thermohydraulics of an enhanced geothermal system (EGS) project in T{\"u}rkiye in Dikili area is presented. The fractured granodiorite is modelled as porous media, utilizing the numerically suggested data of other authors for the corresponding hydraulic characteristics. As the heat transmission fluid, two different mediums are alternatively considered. These are the more classical medium, water and the supercritical Carbon Dioxide (sCO2). Transient calculations are performed for a time period of twenty years, comparing the temporally developing results obtained for water and sCO2 with each other. Based on modeling parameters and assumptions, higher production temperatures are observed with sCO2, in comparison to water, implying an advantage for sCO2 usage as a working fluid in EGS. This is accompanied by the further advantage of a lower pressure drop for sCO2. On the other hand, the temperature advantage is relativized by the lower specific heat capacity of sCO2 causing a decrease in the production thermal power. In general, the present re found to be encouraging for a further and more detailed analysis of the employment of sCO2 as working fluid in EGS.}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{ZenginErdoğanBenim2024, author = {Zengin, İbrahim and Erdoğan, Beytullah and Benim, Ali Cemal}, title = {CFD and Taguchi based optimization of air driven single stage partial admission axial turbine blade profiles}, series = {Energy}, volume = {290}, journal = {Energy}, publisher = {Elsevier}, issn = {0360-5442}, doi = {10.1016/j.energy.2024.130333}, pages = {13}, year = {2024}, subject = {Taguchi-Methode}, language = {en} } @article{EppleFivelandKrohmeretal.2005, author = {Epple, Bernd and Fiveland, Woody and Krohmer, Bernd and Richards, Galen and Benim, Ali Cemal}, title = {Assessment of two-phase flow models for the simulation of pulverized coald combustion}, series = {Clean Air: International Journal on Energy for a Clean Environment}, volume = {6}, journal = {Clean Air: International Journal on Energy for a Clean Environment}, number = {3}, publisher = {Begell House}, issn = {1561-4417}, doi = {10.1615/InterJEnerCleanEnv.v6.i3.50}, pages = {267 -- 287}, year = {2005}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{PfeiffelmannOzmanBenimetal.2022, author = {Pfeiffelmann, Bjorn and Ozman, Cansu and Benim, Ali Cemal and Joos, Franz}, title = {Analysis of the effect of nonuniform surface temperature distribution on the performance of a thermoelectric generator}, series = {Sustainable Energy Technologies and Assessments}, volume = {53}, journal = {Sustainable Energy Technologies and Assessments}, number = {A}, publisher = {Elsevier}, issn = {2213-1388}, doi = {10.1016/j.seta.2022.102375}, year = {2022}, language = {en} } @article{BenimNeuhoff1993, author = {Benim, Ali Cemal and Neuhoff, H. G.}, title = {Analysis of erosion behaviour in a turbocharger radial turbine}, series = {International Journal for Numerical Methods in Fluids}, volume = {16}, journal = {International Journal for Numerical Methods in Fluids}, number = {4}, publisher = {Wiley}, issn = {0271-2091}, doi = {10.1002/fld.1650160402}, pages = {259 -- 285}, year = {1993}, abstract = {An analysis of the erosion behaviour of a turbocharger radial turbine is presented. The solution domain includes both sides of the radial turbine scroll with double intake and the rotor channel. In the analysis a dilute gas-particle flow assumption is employed. The gas turbulence is defined by the k-ε model. In solving the gas phase equation, the computer code Harwell-FLOW3D is employed, which is based on a finite volume formulation using non-orthogonal body-fitted structured gridding and a pressure correction method. The particle phase is described by a Lagrangian approach, while particle paths are computed deterministically, neglecting the turbulent dispersion. For the computation of particle trajectories the code PTRACK is employed, which has been developed at ABB. Computations are carried out for several particle size classes. The results show that particles are thrown back into the scroll by the rotor at high rates. This seems to be the main source of erosion effects in the scroll. It has been observed that particles are unequally distributed between the scroll sides on their re-entry, resulting in greater erosion on one of the scroll sides. The maximum erosion along the scroll is found to be likely to occur near the scroll end.}, subject = {Erosion}, language = {en} } @article{PfeiffelmannDiederichGueletal.2019, author = {Pfeiffelmann, Bj{\"o}rn and Diederich, Michael and G{\"u}l, Fethi and Benim, Ali Cemal and Hamberger, Andreas and Heese, Markus}, title = {Analysis of combustion, heat and fluid flow in a biomass furnace}, series = {E3S Web of Conferences}, volume = {128}, journal = {E3S Web of Conferences}, publisher = {edp sciences}, issn = {2267-1242}, doi = {10.1051/e3sconf/201912803003}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27880}, year = {2019}, language = {en} } @article{MandalBiswasMannaetal.2024, author = {Mandal, Dipak Kumar and Biswas, Nirmalendu and Manna, Nirmal K. and Gayen, Dilip Kumar and Benim, Ali Cemal}, title = {An application of artificial neural network (ANN) for comparative performance assessment of solar chimney (SC) plant for green energy production}, series = {Scientific Reports}, volume = {14}, journal = {Scientific Reports}, number = {1}, publisher = {Springer Nature}, issn = {2045-2322}, doi = {10.1038/s41598-023-46505-1}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-45190}, year = {2024}, abstract = {This study aims to optimize the power generation of a conventional Manzanares solar chimney (SC) plant through strategic modifications to the collector inlet height, chimney diameter, and chimney divergence. Employing a finite volume-based solver for numerical analysis, we systematically scrutinize influential geometric parameters, including collector height (hi = 1.85 to 0.1 m), chimney inlet diameter (dch = 10.16 to 55.88 m), and chimney outlet diameter (do = 10.16 to 30.48 m). Our findings demonstrate that reducing the collector inlet height consistently leads to increased power output. The optimal collector inlet height of hi = 0.2 m results in a significant power increase from 51 to 117.42 kW (~ 2.3 times) without additional installation costs, accompanied by an efficiency of 0.25\%. Conversely, enlarging the chimney diameter decreases the chimney base velocity and suction pressure. However, as turbine-driven power generation rises, the flow becomes stagnant beyond a chimney diameter of 45.72 m. At this point, power generation reaches 209 kW, nearly four times greater than the Manzanares plant, with an efficiency of 0.44\%. Nevertheless, the cost of expanding the chimney diameter is substantial. Furthermore, the impact of chimney divergence is evident, with power generation, collector efficiency, overall efficiency, and collector inlet velocity all peaking at an outer chimney diameter of 15.24 m (corresponding to an area ratio of 2.25). At this configuration, power generation increases to 75.91 kW, approximately 1.5 times more than the initial design. Remarkably, at a low collector inlet height of 0.2 m, combining it with a chimney diameter of 4.5 times the chimney inlet diameter (4.5dch) results in an impressive power output of 635.02 kW, signifying a substantial 12.45-fold increase. To model the performance under these diverse conditions, an artificial neural network (ANN) is effectively utilized.}, language = {en} } @article{BenimDiederichPfeiffelmann2018, author = {Benim, Ali Cemal and Diederich, Michael and Pfeiffelmann, Bj{\"o}rn}, title = {Aerodynamic Optimization of Airfoil Profiles for Small Horizontal Axis Wind Turbines}, series = {Computation}, volume = {6}, journal = {Computation}, number = {2}, publisher = {MDPI}, issn = {2079-3197}, doi = {10.3390/computation6020034}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-25143}, year = {2018}, language = {en} } @article{BenimCanalBoke2021, author = {Benim, Ali Cemal and Canal, Cansu Deniz and Boke, Yakup Erhan}, title = {A Validation Study for RANS Based Modelling of Swirling Pulverized Fuel Flames}, series = {Energies}, volume = {14}, journal = {Energies}, number = {21}, publisher = {MDPI}, issn = {1996-1073}, doi = {10.3390/en14217323}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-37365}, year = {2021}, abstract = {A swirling pulverized coal flame is computationally investigated. A Eulerian-Lagrangian formulation is used to describe the two-phase flow. Turbulence is modelled within a RANS (Reynolds averaged numerical simulation) framework. Four turbulence viscosity- (TV) based models, namely the standard k-ε model, realizable k-ε model, renormalization group theory k-ε model, and the shear stress transport k-ω model are used. In addition, a Reynolds stress transport model (RSM) is employed. The models are assessed by comparing the predicted velocity fields with the measurements of other authors. In terms of overall average values, the agreement of the predictions to the measurements is observed to be within the range 20-40\%. A better performance of the RSM compared to the TV models is observed, with a nearly twice as better overall agreement to the experiments, particularly for the swirl velocity. In the second part of the investigation, the resolution of the discrete particle phase in modelling the turbulent particle dispersion (TPD) and particle size distribution (SD) is investigated. Using the discrete random walk model for the TPD, it is shown that even five random walks are sufficient for an accuracy that is quite high, with a less than 1\% mean deviation from the solution obtained by thirty random walks. The approximation of the measured SD is determined by a continuous Rosin-Rammler distribution function, and inaccuracies that can occur in its subsequent discretization are demonstrated and discussed. An investigation on the resolution of the SD by discrete particle size classes (SC) indicates that 12 SC are required for an accuracy with a less than 1\% mean deviation from the solution with 18 SC. Although these numbers may not necessarily be claimed to be sufficiently universal, they may serve as guidance, at least for SD with similar characteristics}, language = {en} } @article{MabroukNajiBenimetal.2022, author = {Mabrouk, Riheb and Naji, Hassane and Benim, Ali Cemal and Dhahri, Hacen}, title = {A State of the Art Review on Sensible and Latent Heat Thermal Energy Storage Processes in Porous Media: Mesoscopic Simulation}, series = {Applied Sciences}, volume = {12}, journal = {Applied Sciences}, number = {14}, publisher = {MDPI}, doi = {10.3390/app12146995}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-40343}, year = {2022}, language = {en} } @article{BenimZinser1986, author = {Benim, Ali Cemal and Zinser, Walter}, title = {A segregated formulation of Navier-Stokes equations with finite elements}, series = {Computer Methods in Applied Mechanics and Engineering}, volume = {57}, journal = {Computer Methods in Applied Mechanics and Engineering}, number = {2}, publisher = {Elsevier}, issn = {0045-7825}, doi = {10.1016/0045-7825(86)90015-0}, pages = {223 -- 237}, year = {1986}, subject = {Navier-Stokes-Gleichung}, language = {en} } @article{BenimCicekEker2018, author = {Benim, Ali Cemal and {\c{C}}i{\c{c}}ek, Ayd{\i}n and Eker, Arif Mert}, title = {A numerical analysis of the thermohydraulics of an EGS project in Turkey}, series = {MATEC Web of Conferences}, volume = {240}, journal = {MATEC Web of Conferences}, publisher = {edp sciences}, issn = {2261-236X}, doi = {10.1051/matecconf/201824005001}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-27910}, year = {2018}, language = {en} } @article{AslanNahavandiTaymazetal.2012, author = {Aslan, Erman and Nahavandi, A. and Taymaz, I. and Benim, Ali Cemal}, title = {A note on modelling non-rectangular boundaries by the Lattice Boltzmann Method}, series = {Progress in Computational Fluid Dynamics, An International Journal}, volume = {12}, journal = {Progress in Computational Fluid Dynamics, An International Journal}, number = {6}, publisher = {inderscience}, doi = {10.1504/pcfd.2012.049815}, pages = {433 -- 438}, year = {2012}, language = {en} }