@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{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} } @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{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{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{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} } @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} } @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{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{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{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{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{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{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{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} }