Article
Thermodynamics
G. Marseglia, M. G. De Giorgi, P. Pontes, R. Solipa, R. R. Souza, A. L. N. Moreira, A. S. Moita
Summary: This paper investigates the advantages and challenges of two-phase flows, specifically flow boiling of pure liquids and nanofluids, for cooling microchannel heat sinks. The study finds that even at low concentrations, the water-Au nanofluid exhibits superior cooling performance compared to other fluids, indicating that even small concentrations of nanoparticles can significantly impact heat transfer mechanisms.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Rahul Ray, Aurovinda Mohanty, Pandab Patro, Kartik Chandra Tripathy
Summary: This study conducts a performance analysis of branched and interrupted fin heat sinks using numerical simulations to explore the possibility of enhancing heat transfer efficiency. The design that places the secondary fins symmetrically and at the farthest position from the base plate shows the best heat dissipation performance.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Computer Science, Interdisciplinary Applications
Brice Rogie, Casper Schousboe Andreasen
Summary: This paper demonstrates the advantages of topology optimization of heat sinks, beyond the capabilities of pseudo 3D models. It investigates the use of 3D effects for microchannel heat sinks and compares them to state-of-the-art industrial designs for microelectronic applications. The study shows that the performance of microchannel heat sinks highly depends on complex refrigerant distribution and intricate flow paths, and a 3D topology optimized microchannel heat sink can significantly reduce the temperature elevation of a microelectronic chip.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Thermodynamics
Adeel Tariq, Khurram Altaf, Syed Waqar Ahmad, Ghulam Hussain, T. A. H. Ratlamwala
Summary: The benefits of adding multiple perforations and slots in a plate-fin heat sink were studied using a conjugate heat transfer model and experiments. The results showed that the novel plate-fin heat sinks have higher heat transfer coefficients and lower pressure drops compared to traditional plate-fin heat sinks, requiring less fan power. Additionally, the novel heat sinks achieved a reduction in mass due to the presence of slots and perforations.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Hossein Towsyfyan, Basim Freegah, Ammar A. Hussain, Ahmad Muneer El-Deen Faik
Summary: In this study, a computational fluid dynamic analysis was performed to evaluate the thermal performance of a plate-fin heat sink with different design parameters. A neural network simulation was used to predict the most effective geometry of the hollow pins, and the effect of pin pitch on thermal performance was also investigated. The proposed design showed a 20% improvement in thermal efficiency compared to other configurations in the literature.
APPLIED THERMAL ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Pavel Iglin, Tatyana Iglina, Dmitry Pashchenko
Summary: This paper presents a CPU cooling system design using a numerical modelling approach based on automatic calculation in a commercial software. The study focuses on an aluminium CPU heat sink with a new fin design and investigates the heat sink efficiency. The optimization goal was to minimize the CPU processor temperature while minimizing the heat sink mass. Three methods were compared, and the adaptive multiple-objective method was determined to be the best for heat sink optimization. The optimized design parameter resulted in a CPU temperature range of 304-307K and a mass of 81-87g, compared to 93g and a CPU temperature range of 309-311K before optimization of the design parameters.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2023)
Review
Thermodynamics
Daxiang Deng, Long Zeng, Wei Sun
Summary: This paper comprehensively reviews recent advancements in flow boiling enhancement and fabrication of enhanced microchannels. It emphasizes the flow boiling enhancement performance of these enhanced microchannels in microchannel heat sinks, while also discussing their advantages and disadvantages after summarizing the classification and manufacturing methods of enhanced microchannels.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Zengkun Zhan, Lixia Chen, Hongna Zhang, Chuandong Lin, Sining Li, Xiaobin Li, Fengchen Li
Summary: This research proposes a new technique for heat transfer enhancement using viscoelastic fluid pulsating laminar flow (VPL flow). Numerical studies and flow performance analysis show that VPL flow significantly improves the overall heat transfer performance, with optimal enhancement achieved at pulsation frequencies close to the characteristic frequency of the viscoelastic fluid flow.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Mechanical
F. -J. Granados-Ortiz, J. Ortega-Casanova
Summary: This paper introduces and analyzes a novel method of enhancing mixing using two parallel wall jets, showing that a small channel ratio seems to be a very efficient option for heat/mass transfer with low power requirement. The study suggests that for a range of laminar wall jets, using a small channel ratio can generate intense oscillation downstream, enhancing mixing efficiently.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Thermodynamics
Thavamalar Kumaravelu, Syamimi Saadon, Abd Rahim Abu Talib
Summary: The Stirling engine has high theoretical efficiency and multi-fuel adaptability, but its performance is penalized when integrated with a low heat source. This paper focuses on enhancing engine performance through heat transfer, investigating the effects of different types of fins on efficiency through numerical analysis. The addition of rectangular fins led to the highest efficiency of 19.03% with improvements in heat transfer rate, efficiency, and power output.
Review
Thermodynamics
Shashank Singh, Anup Malik, Harlal Singh Mali
Summary: This article critically examines the research on modifications in geometry of channels for thermo-hydraulic performance enhancement and aims to determine the best channel configuration with optimal parameters. It explores various designs and their influencing parameters, as well as presents conclusions and potential recommendations for future research.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Amir Saadatmand, Mohammad Goharkhah, Alireza Mahdavi Nejad
Summary: The study focuses on the feasibility of heat transfer enhancement using an external electric field, discussing the impact of corona wind on the coolant. Results show that the electric field induces a vortex that increases heat transfer rate, with the number of electrodes negatively impacting heat transfer enhancement. Additionally, the perpendicular electrode-flow layout performs better than the parallel layout.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Osman Bedrettin Karatas, Kemal Furkan Sokmen
Summary: This study investigates the thermal behavior of Lithium-ion batteries and proposes a module design and optimization for temperature management. The results suggest that specific cell connection distances and the inclusion of a metal insert can effectively lower battery temperature, extending lifespan and promoting equal aging.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Ahmad Ali Awais, Muhammad Saeed, Man-Hoe Kim
Summary: This paper presents enhancements in thermal and hydraulic performance of a minichannel heat sink using supercritical carbon dioxide (sCO2) as a coolant. Results show significant improvements in heat transfer efficiency and pressure drop reduction under specific conditions with CO2 cooling.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Javad Mohammadpour, Ann Lee, M. Mozafari, Mehran Rajabi Zargarabadi, Arun S. Mujumdar
Summary: The study found that the best heat transfer enhancement is achieved when setting p = 2%, oscillating frequency is 560 Hz, amplitude is 30 um, and nanoparticle diameter is 100 nm. Comparison between SPM and DPM showed that DPM cooling is more realistic, with thermophoresis force being the most significant force affecting the heat transfer coefficient.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
Faraz Afshari, Hadi Ghasemi Zavaragh, Bayram Sahin, Roberta Cocci Grifoni, Francesco Corvaro, Barbara Marchetti, Fabio Polonara
MATHEMATICS AND COMPUTERS IN SIMULATION
(2018)
Article
Thermodynamics
Bayram Sahin, Ibrahim Ates, Eyuphan Manay, Abdulkadir Bayrakceken, Cafer Celik
APPLIED THERMAL ENGINEERING
(2019)
Article
Thermodynamics
Mustafa Ozsipahi, Haluk Anil Kose, Sertac Cadirci, Husnu Kerpicci, Hasan Gunes
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2019)
Article
Energy & Fuels
Ataollah Khanlari, Adnan Sozen, Bayram Sahin, Giovanni Di Nicola, Faraz Afshari
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2020)
Article
Thermodynamics
Djamel Sahel, Lahcene Bellahcene, Aissa Yousfi, Abdussamet Subasi
Summary: The study investigated the hydrothermal performance of a heat sink with hemispherical pin fins under fully turbulent flow conditions and optimized the fin configuration. Through the perforation technique, the hydrothermal performance of the heat sink was enhanced significantly.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Abdussamet Subasi, Kasim Erdem
Summary: In this study, a hybrid approach combining MOO and MCDM techniques was used to enhance heat transfer in pipes by evaluating the performance of different nanofluids and inserts. The optimal design parameters were determined using MOO study and TOPSIS method, assisting decision-makers in selecting the best solution among Pareto optimal solutions. The combination of twisted tape and CNT-Fe3O4 nanofluid exhibited the best thermal-hydraulic performance for equal weights of criteria.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Mechanical
Faraz Afshari, Ataollah Khanlari, Adnan Sozen, Azim Dogus Tuncer, Ibrahim Ates, Bayram Sahin
Summary: This study is important for the aerodynamic design and manufacturing of wind turbine blades. The optimum blade angle was determined through numerical simulations and experimental tests, and it was found that blade angles in the range of 5 degrees-10 degrees showed the best performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Thermodynamics
Emre Mandev, Eyuphan Manay, Shabnam Rahimpour, Ali Mohammadzadeh, Bayram Sahin, Faraz Afshari, Reza Teimuri-Mofrad
Summary: Nanofluids, which are suspension of nanoparticles in a base fluid with improved thermophysical properties, have various applications. The stability of nanofluids plays a crucial role in their thermophysical properties and can significantly impact the performance of energy systems. Surface modification of nanoparticles can result in more stable nanofluids with extended lifetime.
HEAT TRANSFER RESEARCH
(2022)
Article
Thermodynamics
Eda Feyza Akyurek, Murat Ceylan, Eyuphan Manay, Bayram Sahin
Summary: In this study, the mixed convection heat transfer properties of nanofluids in minichannels were investigated by dispersing SiO2 nanoparticles into pure water. The results showed that increasing the volume ratio of nanoparticles enhanced the heat transfer, and increasing the minichannel diameter also enhanced the Nusselt number. Moreover, the concentration of nanoparticles had a significant effect on the natural convection/forced convection ratio and the natural convection effect.
HEAT TRANSFER RESEARCH
(2022)
Article
Thermodynamics
Faraz Afshari, Bayram Sahin, Barbara Marchetti, Fabio Polonara, Francesco Corvaro, Mariella Leporini, Farzad Afshari
Summary: In this study, the drag coefficient and flow wake structure of spherical particles with different hole numbers and hole diameters were numerically investigated using CFD, with analysis conducted on the variation of drag coefficient under different flow conditions. The study showed an increase in drag coefficient for spherical particles with 15 holes at Reynolds number 20, with different dimensionless hole diameters leading to different percentage increases.
HEAT TRANSFER RESEARCH
(2021)
Article
Thermodynamics
Abdussamet Subasi, Eyuphan Manay, Seyma Elbas, Bayram Sahin
Summary: An experimental study was conducted to investigate the hydro-thermal performance of SiO2 nanofluid flows in circular minichannels with constant heat flux boundary conditions. The optimal design and flow parameters were determined through multi-objective optimization analysis, maximizing Nu and minimizing f simultaneously.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Faraz Afshari, Bayram Sahin, Ataollah Khanlari, Eyuphan Manay
HEAT TRANSFER RESEARCH
(2020)
Article
Thermodynamics
Yunxia Ma, Fei Liu, Honggang Pan, Hongjian Zhang, Shuxia Yan, Ailing Zhang
Summary: This paper proposes a dynamically tunable and switchable perfect infrared absorber that exhibits excellent electrical regulation performance and high absorptance. The absorption mechanism is explained using a multiple interference model, and it is proven to be polarization insensitive.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
F. J. dos Santos, G. S. M. Martins, M. Strobel, L. Beckedorff, K. V. de Paiva, J. L. G. Oliveira
Summary: This study investigates the effects of inlet conditions and plate's features on the thermal-flow performance of a gasket plate heat exchanger (GPHE) and assesses the impact of a modified tightening distance on its performance. No systematic study on the combined effects of inlet conditions and assembly accuracy on GPHE performance has been conducted before.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Alok K. Ray, Dibakar Rakshit, K. Ravi Kumar, Hal Gurgenci
Summary: The low thermal conductivity of phase change materials limits the heat transfer rate and application of latent heat storage systems. This numerical study examines the impact of two passive heat transfer enhancement techniques on the thermal performance of a latent heat storage system. The results show that the orientation and position of the heat transfer fluid tube have significant effects on the charging duration, while the discharging duration remains unchanged. The combined effect of orientation and eccentricity reduces the charging duration, but increases the discharging duration compared to the concentric domain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yalu Han, Yanlong Wang, Chenyang Liu, Xinmin Hu, Yin An, Zhengcai Li, Jiaxun Jiang, Lizhi Du
Summary: This paper investigates the calculation method of thermal conductivity in NAPLs-contaminated soils. By establishing NAPLs-contaminated soil models and using the Lattice Boltzmann Method (LBM) for calculation, an optimized three-dimensional model with high computational accuracy and efficiency is obtained. The study also finds that saturation and Nz parameters have a significant impact on calculation time, while the thermal conductivity of the two-dimensional model is more sensitive to anisotropy. The influence of porosity and NAPLs content on thermal conductivity should be considered during in-situ thermal desorption.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Mostafa Taha, Song Zhao, Aymeric Lamorlette, Jean-Louis Consalvi, Pierre Boivin
Summary: For the first time, large-eddy simulations (LES) of the near-field region of large-scale fire plumes were performed using a pressure-based Lattice Boltzmann method (LBM) with low-Mach number approximation. The simulations showed quantitative agreement with experimental data and were consistent with previously-published numerical studies. The study demonstrated the computational efficiency of the proposed LBM solver in tackling fire-induced flows, suggesting LBMs as a good alternative candidate for modeling fire-related problems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weixin Zhang, Yehang Xie, Yuqiang Ding, Zhao Liu, Zhenping Feng
Summary: This study investigated the impact of upstream slot leakage on the endwall film cooling characteristics of turbine blades. Pressure Sensitive Paint (PSP) technology was used to measure the film cooling characteristics, and numerical analysis was conducted to evaluate the aerodynamic performance. It was found that increasing the mass flow ratio of the upstream slot enhanced film cooling, decreased aerodynamic losses, and reduced the strength of passage vortex. However, reducing the distance between the slot and the blade leading edge only enhanced film cooling without affecting the leakage coverage area.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rui Zhang, Zhen-lei Li, Yan-sheng Zhang, Dong Chen, Guo Yuan
Summary: This study discusses the heat transfer behavior of different jet forms on steel tubes. The results show that the annular jet performs better in terms of cooling intensity and uniformity. The cooling performances of the two jet forms are similar when the steel tube size is small. Therefore, the planar jet can be considered for smaller diameters due to its simplicity, low cost, and convenience in application.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
A. R. Khoei, A. M. Orvati Movaffagh, A. Rezaei Sameti
Summary: This paper presents a comprehensive study on the thermo-mechanical characteristics of oxide-coated aluminum nano-powder. It is found that the thermal conductivity of oxide-coated aluminum nano-powder is significantly lower than that of the bulk aluminum, and it is affected by the density and temperature.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yanjin Wang, Jintao Xiong, Lingyu Chen, Zhihai Lv, Qian Wang
Summary: A solar radiation transfer model for spray cooling double skin facade (SC-DSF) is proposed in this study. The model is validated by experimental results and various influence factors are analyzed. The effectiveness of adjusting droplet coverage rate and size is also evaluated.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Bostjan Zajec, Blaz Mikuz, Anil Kumar Basavaraj, Marko Matkovic, Matej Tekavcic, Martin Draksler, Leon Cizelj, Bostjan Koncar
Summary: We have developed an advanced experimental setup to investigate flow and heat transfer in an annular channel. The setup allows heat transfer measurements and flow visualization using a temperature-controlled inner tube. Measurements can be conducted in both single-phase and two-phase flow regimes. The setup ensures a uniform velocity field in the annular channel using specially designed inlet and outlet headers. The inner copper tube is heated by water and contains turbulators for enhanced heat transfer and thermocouples for temperature measurement. A three-dimensional conjugate heat transfer CFD model has been developed and validated to accurately estimate heat losses in the setup. This study demonstrates the importance of numerical simulations in improving the interpretation of complex experimental results.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weijie Chen, Ke Wang, Yongqing Wang, Shantung Tu, Zunchao Liu, Huijuan Su
Summary: In this study, a novel gradient porosity transpiration cooling plate structure (GP-TCPS) is proposed to alleviate heat transfer deterioration caused by non-uniform temperature distribution in transpiration cooling plate structure (TCPS). Computational fluid dynamics (CFD) and response surface method (RSM) were used for qualitative and quantitative analysis of the flow and heat transfer of GP-TCPS. The optimized structure of GP-TCPS significantly improves temperature uniformity, injection pressure, and average cooling efficiency compared to traditional TCPS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
R. Essam, A. Elsaid, W. K. Zahra
Summary: This study presents a novel bioheat model for simulating heat transfer in skin tissue. The model offers an improved representation of thermal dynamics in the skin and has been validated using numerical solutions and experimental measurements. The study highlights the importance of incorporating vascular inlet parameters and thermal relaxation effects in the thermal profile, and suggests potential applications in thermal therapy and wound healing.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Dongbo Shi, Tao Xu, Zifeng Chen, Di Zhang, Yonghui Xie
Summary: The cooling structure design of turbine blades is crucial for the safety and reliability of the gas turbine set. This research investigates different arrangement schemes, including dimple/protrusion arrangements, to enhance the cooling performance. The results show that the arrangement scheme with both passes arranged by dimples has the best comprehensive thermal performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Emrehan Guersoy, Hayati Kadir Pazarlioglu, Mehmet Guerdal, Engin Gedik, Kamil Arslan
Summary: The thermo-hydraulic performance of Al2O3/H2O nanofluid with different nanoparticle shapes flowing in a sudden expansion tube with variable sudden expansion inclination angles and elliptical dimpled fins with different diameters were numerically investigated. The results showed that the nanoparticle shapes, sudden expansion inclination angles, and elliptical dimpled fin have significant impact on the thermo-hydraulic performance. This study reveals the novelty and importance of these factors in the research.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rukun Hu, Xinyu Huang, Xinyu Gao, Liu Lu, Xiaohu Yang, Bengt Sund
Summary: This study examines the impact of applying bottom cross-cut on PCM's spatial distribution in a horizontal LHTES unit using numerical simulation. The findings show that bottom cross-cut can improve the heat storage rate and natural convection heat transfer gain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
