Numerical study on hydrothermal performance in a microchannel with gradient array of ribs and pin fins

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-11-29 DOI:10.1016/j.ijthermalsci.2024.109562

Chunquan Li , Yuanhao Zheng , Hongyan Huang, Wencong Zhang, Yilong Hu, Yuling Shang

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Abstract

An innovative microchannel heat sink (MCHS-GDRPF) with gradient array of ribs and pin fins is proposed to address the heat thermal management of high heat flux densities and ensure temperature uniformity. This heat sink combines the cooling advantages of ribs and pin fins, with the structural dimensions of the ribs and pin fins increasing linearly along the flow direction. Three-dimensional numerical simulations are utilized to assess the impacts of different gradient array patterns, relative rib-pin fins diameter and height on hydrothermal performance and temperature uniformity. Additionally, a comprehensive comparison of hydrothermal performance between the MCHS-GDRPF and four other microchannels with similar structured arrangements is presented. The results show that at a Reynolds number of 622, the surface temperature of the heat source is reduced by

28.59 K

, temperature uniformity is improved by 73.4%, the Nusselt number exhibits a 195.1% enhancement, and the performance evaluation criterion (PEC) attains a value of 1.366. Overall, this structure effectively ensures temperature uniformity and enhances heat dissipation capacity.

Abstract Image

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肋钉梯度阵列微通道热液性能的数值研究

为了解决高热流密度下的热管理问题和保证温度均匀性，提出了一种具有肋片和鳍片梯度阵列的新型微通道散热器（mhs - gdrpf）。这种散热器结合了肋片和销片的冷却优势，肋片和销片的结构尺寸沿流动方向线性增加。采用三维数值模拟的方法研究了不同梯度阵列模式、肋针翅相对直径和高度对热液性能和温度均匀性的影响。此外，还比较了MCHS-GDRPF与其他四种结构相似的微通道的水热性能。结果表明：在雷诺数为622时，热源表面温度降低了28.59K，温度均匀性提高了73.4%，努塞尔数提高了195.1%，性能评价准则（PEC）达到1.366。总体而言，这种结构有效地保证了温度均匀性，增强了散热能力。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.