Study on the performance of wavy microchannel heat sink with staggered inlets and outlets

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-09-18 DOI:10.1016/j.ijthermalsci.2024.109426

Li Zhang , Lin Li , Dong-Ming Mo , You-Rong Li

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Abstract

The substrate temperature gradient of electronic devices not only affects their performance, but also reduces their reliability and service life. In order to get a more uniform temperature distribution on the bottom of a microchannel, a wavy microchannel heat sink with staggered inlets and outlets was proposed. With water as the coolant, numerical simulation was adopted to explore the reinforcing impact of the wavy sidewall structure on the temperature uniformity and the heat transfer of the staggered inlets and outlets microchannel unit when the Reynolds number varies at 102–615. The findings reveal that with the increase of the wave amplitude and Reynolds number, as well as the decrease of the wavelength, the intensity and number of Dean vortices increase, and heat transfer of the wavy microchannel with the staggered inlets and outlets is improved. In comparison with the traditional straight microchannel unit with the co-current mode, the temperature difference on the bottom of the wavy microchannel unit with the staggered inlets and outlets is reduced by (90.1–94.5) %.

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具有交错入口和出口的波浪形微通道散热器的性能研究

电子器件的基底温度梯度不仅会影响其性能，还会降低其可靠性和使用寿命。为了使微通道底部的温度分布更加均匀，提出了一种进出口交错的波浪形微通道散热器。以水为冷却剂，通过数值模拟探讨了当雷诺数在 102-615 之间变化时，波浪形侧壁结构对交错进水口和出水口微通道单元的温度均匀性和传热的强化影响。研究结果表明，随着波幅和雷诺数的增大以及波长的减小，迪恩涡旋的强度和数量增加，进水口和出水口交错的波浪形微通道的传热效果得到改善。与传统的同流模式直线微通道相比，进水口和出水口交错的波浪形微通道底部温差减少了（90.1-94.5）%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.