Article
Green & Sustainable Science & Technology
Xinjian Deng, Enying Li, Hu Wang
Summary: For the multi-objective design of heat sinks, a variable-fidelity evolutionary method (VFMEM) was suggested to improve the efficiency of evolutionary algorithms. Compared with other algorithms, VFMEM solves a high-fidelity model using a low-fidelity model and has the distinctive characteristic of application in multi-objective optimization.
Review
Energy & Fuels
Prabhakar Bhandari, Kamal S. Rawat, Yogesh K. Prajapati, Diwakar Padalia, Lalit Ranakoti, Tej Singh
Summary: Recent advancements in technology have highlighted the importance of micro pin fin heat sinks in dissipating heat flux. This review paper systematically analyzes the different aspects of micro pin fin design and suggests optimal design parameters for single phase fluid flow. Additionally, the study explores the potential of innovative pin fins, such as piranha, open ring, and lattice structures, in achieving effective cooling.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Cheng-Hung Huang, Yi-Ting Wu
Summary: The study investigated the design of a three-dimensional optimum pin fin heat sink using numerical methods and experiments under natural convection conditions. The results showed that a tapered pin heat sink with a 66-degree orientation angle had the lowest thermal resistance among all designs, demonstrating the effectiveness of the design algorithm in estimating the optimal variables for natural convection pin fin heat sinks.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Young Jin Lee, Sung Jin Kim
Summary: The study optimizes the distribution of fin density using the Kriging method to reduce thermal resistance and weight.
APPLIED THERMAL ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Ali Ghasemi, Ali Elham
Summary: A multi-objective topology optimization approach is developed to minimize both thermal resistance and pressure loss of forced convective pin-fin heat exchangers. A pseudo-3D conjugate heat transfer model is utilized based on the periodic flow and fin design pattern to reduce the cost of full 3D model optimization. The study demonstrates superior cooling performances of the optimized topologies with lower costs of pressure losses compared to conventional in-line and staggered fins.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Thermodynamics
Yacine Khetib, Khaled Sedraoui, Abdellataif Gari
Summary: This study numerically investigated a micro-pin-fin heat sink to improve its cooling capability and productivity. It found that the RS configuration had the maximum heat transfer while also yielding the maximum pressure drop.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Yigit Serkan Sahin, Beytullah Ismet Toprak, Ismail Solmaz, Ozgur Bayer
Summary: With the rapid development in the electronics industry, the thermal management of high power density electronic products has become crucial. This study proposes an integrated heat sink composed of aluminum foam and pin-finned heat sink configurations as an effective solution for the thermal management of such electronic products. Through numerical investigation and experimental examination, the integrated heat sink demonstrates favorable heat removal and pressure drop characteristics under various design conditions.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Yu Chen, Haoran Chen, Hao Zeng, Jianjun Zhu, Kai Chen, Zhenyu Cui, Jianli Wang
Summary: The optimal structure of a sinusoidal wavy plate fin heat sink with crosscut was determined using an efficient intelligent optimization method based on the Bayesian Optimization algorithm. The comprehensive thermal performance factor was improved by reducing the pressure drop penalty and optimizing the structural parameters.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Daxiang Deng, Long Zeng, Wei Sun, Guang Pi, Yue Yang
Summary: A new type of open-ring pin fin microchannels (ORPFM) was proposed for advanced microchannel heat sinks, with inline arrangement showing improved boiling heat transfer, reduced pressure drop, and more stable flow boiling process at high heat fluxes through experimental investigation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Yicang Huang, Mingliang Xu, Hui Li, Shengnan Shen, Xinzhong Song, Hongmin Liu, Adili Waili, Liang Zhao, Wei Wei
Summary: The study introduces a novel method to enhance the performance of micro-pin-fin heat sinks through improving the geometry of the fins, resulting in significantly improved heat transfer performance of the novel heat sink structure.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Chemistry, Analytical
Xiaonan Guan, Zhihui Xie, Gang Nan, Kun Xi, Zhuoqun Lu, Yanlin Ge
Summary: A three-dimensional convective heat transfer model of a microchannel pin-fin hybrid heat sink was established and the splitting distance of pin-fins was optimized. The research results showed that multiple parameters need to be considered in the optimization design and a selection strategy for pin-fin diameter and splitting distance was proposed.
Article
Thermodynamics
Ziqiang He, Yunfei Yan, Li Zhang
Summary: The study found that micro heat sinks with arc ribbed pin-fins exhibit the best comprehensive performance, and staggered ribs arrangement performs better than in-line ribs arrangement. The average Nu number increases first and then decreases with the increase in rib width.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Yanpei Huang, Qi Yang, Jianyin Miao, Kai Tang, Jingquan Zhao, Jinyin Huang, Yuandong Guo
Summary: This study proposes a radial micro pin-fin heat sink for heat dissipation of high-heat-flux hotspots, which combines the advantages of micro pin-fin structure and central inlet jet configuration. Experimental results show that this heat sink can maintain stable and outstanding heat transfer performance under different experimental conditions.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Ziliang Rui, Juan Li, Tianxiang Ding, Jie Ma, Hao Peng
Summary: This study conducted a numerical research of pin fin heat sinks based on phase change materials using the lattice Boltzmann method. It investigated the effects of different geometries and PCMs on the working performance of the heat sinks. Results indicated that the heat sink with 10% CNT compound paraffin and four/five square fins had the shortest charging time, while the heat sink with 8% CNT compound paraffin and four square fins had the highest heat dissipation power.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Cheng-Hung Huang, Yuan-Rei Huang
Summary: This work presents the design of a Plate-Pin-Fin Heat Sink with Perforations and Splitters (PPFHS-PS) using numerical simulations and experimental verifications, demonstrating the superior thermal performance of the design.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
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)