@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{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{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{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{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{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{VishwakarmaBhattacharyyaSonietal.2025, author = {Vishwakarma, Devendra Kumar and Bhattacharyya, Suvanjan and Soni, Manoj Kumar and Benim, Ali Cemal}, title = {Transitional Mixed Convection in Inclined Solar Air Heater Tube with Wavy Inserts}, series = {Heat Transfer Engineering}, journal = {Heat Transfer Engineering}, publisher = {Informa}, issn = {0145-7632}, doi = {10.1080/01457632.2025.2480906}, pages = {15}, year = {2025}, subject = {Numerische Str{\"o}mungssimulation}, 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} } @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{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{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{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{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{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{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{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{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{EppleBenim2003, author = {Epple, B. and Benim, Ali Cemal}, title = {A CRFD study of supercritical 2 x 900 MW boilers for Shanghai, P.R. of China}, series = {Progress in Computational Fluid Dynamics}, volume = {3}, journal = {Progress in Computational Fluid Dynamics}, number = {2-4}, publisher = {Inderscience}, issn = {1468-4349}, doi = {10.1504/PCFD.2003.003772}, pages = {140 -- 144}, year = {2003}, subject = {Numerische Str{\"o}mungssimulation}, language = {en} } @article{PasqualottoBenim2001, author = {Pasqualotto, E. and Benim, Ali Cemal}, title = {A new phenomenological modelling approach for diesel engine side injection systems and comparison with computational fluid dynamics}, volume = {1}, number = {1-3}, publisher = {Inderscience}, issn = {1468-4349}, doi = {10.1504/PCFD.2001.001479}, pages = {149 -- 158}, year = {2001}, subject = {Numerische Str{\"o}mungssimulation}, 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} }