Review
Engineering, Chemical
Liang Du, Wenbo Hu
Summary: With the miniaturization and integration of various electronic components, the heat transfer of electronic equipment faces challenges. Microchannel heat sinks are widely used but have drawbacks, so efforts are being made to improve their heat transfer performance. This paper reviews and summarizes the latest research progress of microchannel heat sinks in terms of structure, reinforcement, surface treatment, and material types. The study suggests the need to balance heat transfer efficiency and pressure drop penalty, and provides suggestions for future research directions and ideas.
CHEMICAL ENGINEERING SCIENCE
(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
Gaofeng Lu, Jianrong Yang, Xiaoqiang Zhai, Xiaolin Wang
Summary: This paper investigates hotspot-targeted thermal management using VGs in microchannels, showing that the adoption of VGs can significantly improve cooling effect over the hotspot with lower pressure loss.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Xinyu Ji, Xiaoping Yang, Yuantong Zhang, Yonghai Zhang, Jinjia Wei
Summary: This article designs and manufactures silicon-based fractal tree-shaped microchannel heat sinks and experimentally studies their heat transfer and pressure drop characteristics. The results show that compared with traditional linear microchannel heat sinks, fractal microchannel heat sinks achieve significant improvements in flow drag reduction and heat transfer enhancement.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Hussein M. Maghrabie, A. G. Olabi, Enas Taha Sayed, Tabbi Wilberforce, Khaled Elsaid, Mohammad Hossein Doranehgard, Mohammad Ali Abdelkareem
Summary: Nowadays, cooling electronic components is considered a critical issue. This study focuses on fluid flow, heat transfer, and thermal performance to avoid hot spots in electronic devices. It discusses the use of nanofluids in microchannels for cooling electronics, considering the thermophysical properties and future prospects of nanofluids in electronic components.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
D. D. Ma, Y. X. Tang, G. D. Xia
Summary: The sinusoidal wavy microchannels with secondary channels (SWSC) show better heat removal performance in flow boiling studies compared to conventional microchannels, thanks to increased bubble nucleation induced by enlarged surface area and continuous development of thin liquid film due to the introduction of secondary channels. However, the SWSC microchannels suffer from a higher pressure drop penalty.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Mostafa Fathi, Mohammad Mahdi Heyhat, Mohammad Zabetian Targhi, Sajjad Bigham
Summary: Porous-fin microchannel heat sinks have the potential to improve the thermal and hydraulic performances of microelectronic cooling systems. However, the reduced effective thermal conductivity of porous fins compared to solid fins can negatively impact the thermal performance of the microchannel heat sinks. This research confirms that replacing solid with porous fins can simultaneously enhance the thermal and hydraulic performances of microchannel heat sinks.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Ali H. Al-Zaidi, Mohamed M. Mahmoud, Tassos G. Karayiannis
Summary: This paper presents an experimental study on flow boiling patterns, heat transfer rates, and pressure drop in multi-microchannels evaporators made of copper and aluminium. The results showed that aluminium heat sinks have comparable thermal performance to that of copper heat sinks.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Energy & Fuels
Hao Yu, Tongling Li, Xiaoxin Zeng, Tianbiao He, Ning Mao
Summary: This paper reviews, classifies, and summarizes the microchannel geometry characteristics of previous studies. It mainly focuses on the impact of microchannel geometry features and structural design on heat transfer and pressure drop, and discusses the future research direction of microchannel geometry design.
Article
Thermodynamics
Abdullah Masoud Ali, Matteo Angelino, Aldo Rona
Summary: The study investigates the hydraulic and thermal performance of microchannel heat sink configurations for high performance electronic cooling applications using numerical modelling. Results show that inserting zig-zag fins and using 3% Al2O3 nanofluid coolant in the ducts significantly improve heat transfer efficiency and reduce contact temperature.
APPLIED THERMAL ENGINEERING
(2021)
Review
Thermodynamics
Akash Dwivedi, Mohammad Mohsin Khan, Harveer Singh Pali
Summary: A novel framework has been employed to enhance heat transfer in heat exchangers through microchannels. The use of nanofluids as working fluids shows better thermal behavior. Flow disrupters and ceramic microchannels can also improve heat transfer performance.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Jingzhi Zhang, Jun An, Li Lei, Xinyu Wang, Gongming Xin, Zan Wu
Summary: This paper numerically studied the subcooled flow boiling in MMC heat sinks. The feasibility of using the Mixture multiphase flow model to simulate the subcooled flow boiling in the MMC heat sink is validated. The results show that the temperature distribution in the MMC heat sink is affected by the microchannel aspect ratio and the Mixture model is suitable for studying flow boiling in complex MMC.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
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
Fei Liu, Dalei Jing
Summary: The study investigated the hydrothermal performance of symmetric and asymmetric divergent-convergent microchannel heat sinks, finding that smaller inlet-to-middle width ratio results in lower thermal resistance but higher pressure drop in symmetric DCMCHS. Decreasing outlet-to-inlet width ratio improves thermal performance and increases pressure drop in width-asymmetric DCMCHS. Increasing middle cross-sectional width reduces thermal resistance but consumes more pressure drop in width-asymmetric DCMCHS with fixed channel height and outlet-to-inlet width ratio.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Vivian Y. S. Lee, Tassos G. Karayiannis
Summary: The effect of system pressure on the flow boiling characteristics of HFE-7200 in a parallel microchannel heat sink was studied. Increasing pressure reduced pressure drop and increased bubble generation frequency and two-phase heat transfer coefficients. Smaller bubble diameters at higher pressures caused a delay in flow regime transition and flow reversal. The experimental work provides promising methods to manage flow instabilities and enhance heat transfer performance in two-phase microchannel systems.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Xiaoru Zhuang, Xinhai Xu, Lun Li, Daxiang Deng
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Materials Science, Multidisciplinary
Xiang Huang, Tequila A. L. Harris, Yan Wang, Wei Zhou, Daxiang Deng, Tianqing Zheng
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2020)
Article
Thermodynamics
Guang Pi, Daxiang Deng, Liang Chen, Xinhai Xu, Chenyang Zhao
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Energy & Fuels
Yuhua Wu, Jianpeng Cui, Xinhai Xu, Daxiang Deng
Summary: Concentrated photovoltaic (CPV) has attracted attention for its higher efficiency compared to traditional solar cells by concentrating sunrays. Heat dissipation is a critical challenge for CPV at high concentration ratios, but can be mitigated by adjusting water flow rate and temperature to reduce cell temperature and enhance power output. The overall efficiency of heat sinks is influenced by cooling area and channel numbers.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
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
Chemistry, Physical
Xiang Huang, Wei Zhou, Daxiang Deng
Summary: Understanding the correlation between pore-scale structure and diffusion transport property is crucial for designing and optimizing the performance of porous fibrous materials for energy applications. The lattice Boltzmann method (LBM) and pore network modeling (PNM) are commonly used modeling techniques, but direct comparisons between them have received little attention. Through simulations, it was found that the effective diffusion coefficients between the two methods were in good agreement when estimating throat radius using the cross-section area equivalent radius.
Article
Materials Science, Multidisciplinary
Daxiang Deng, Jian Zheng, Xiaolong Chen, Wei Sun
Summary: This study developed a facile and scalable thermal oxidation method to prepare CuO nanowires on the electrodischarge machining (EDM) processed V-shaped microgrooves. The formation of nanowires was influenced by both annealing temperature and time, and all the nanowire samples showed hydrophobic properties.
CURRENT APPLIED PHYSICS
(2021)
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
Engineering, Mechanical
Long Zeng, Daxiang Deng, Ningbo Zhong, Guisen Zheng
Summary: A unique microchannel heat sink design with inline and staggered open-ring pin fins was developed for high heat flux devices. The open-ring pin fins induced flow separations and convergences, leading to enhanced heat transfer performance. The staggered configuration showed slightly better heat transfer performance than the inline configuration, making it more favorable for heat dissipation in high heat flux devices.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Thermodynamics
Zhi-Jia Xu, Man-Si Luo, Qing-Hui Wang, Hao Zhao, Ying-Jun Wang, Da-Xiang Deng
Summary: This paper proposes a shape optimization method to optimize the shape of the evaporator wick in CPVC, based on the study on the minimization of the maximum pressure drop. By analyzing sensitivity information, the side shape of the wick block is changed, reducing the maximum pressure drop and providing a more scientific and objective alternative for the design of wicks in CPVC.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Xiang Huang, Wei Zhou, Daxiang Deng, Bin Liu, Kaiyong Jiang
Summary: A stochastic pore network modeling method with tailored structures was proposed to investigate the impacts of surface microchannels on the transport properties of porous fibrous media. Results showed that microchannels increased permeability of flow while smaller pores provided higher resistance for better catalyst support. This work suggests that the modeling framework is promising for the design optimization of cross-scale porous structures.
Article
Engineering, Manufacturing
Da-Xiang Deng, Jian Zheng, Xiao-Long Chen, Guang Pi, Yong-Heng Liu
Summary: A laser-micromilling process was developed to fabricate micro pin fins on inclined V-shaped microchannel walls for enhanced heat sinks. The height of the pin fins increased with scanning speed but decreased with line spacing. Optimal processing parameters were found to be a laser output power of 21 W, scanning speed of 100-300 mm/s, and line spacing of 2-5 μm.
ADVANCES IN MANUFACTURING
(2022)
Article
Energy & Fuels
Liang Chen, Daxiang Deng, Qixian Ma, Yingxue Yao, Xinhai Xu
Summary: Efficient cooling is crucial for high concentration photovoltaic (HCPV) cells to maintain their electrical performance and extend their lifetime. In this study, a novel microchannel heat sink with serpentine reentrant microchannels (SRM) was developed for efficient cooling of HCPV cells. The SRM design effectively reduced cell temperatures and improved temperature uniformity, resulting in increased output power and electrical efficiency for the HCPV cell module.
Article
Thermodynamics
Qing-Hui Wang, Zhan-Hui Wu, Zhi-Jia Xu, Xiao-Lin Fang, Hao Zhao, Ying-Jun Wang, Da-Xiang Deng
Summary: This study proposes an optimization method based on design of experiments and response surface methodology, using a decoupling strategy to optimize the groove parameters of the composite porous vapor chamber. The results show that the groove parameters have a nonmonotonic effect, with groove depth having the greatest influence on thermal hydraulic characteristics. The optimal groove parameter configuration can reduce the maximum temperature, maximum temperature difference, and liquid pressure drop, providing a more objective and scientific design method for CPVC structural parameters.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
