Performance analysis on a novel microchannel heat sink with secondary flow channels and staggered inlet and outlet

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2024-11-15 DOI:10.1016/j.icheatmasstransfer.2024.108347

Lin Li , Yu-Peng Hu , You-Rong Li

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Abstract

For the sake of the decreasing temperature distribution nonuniform on the base of the microchannel heat sink, this paper proposes a novel microchannel heat sink with the secondary flow channels and staggered inlet and outlet unit to reduce the highest temperature on the base. The influences of the spacings between the inlet and outlet and between two secondary flow channels, and Reynolds number on the base temperature uniformity are studied numerically. It is found that the secondary flow can interrupt and rebuild the boundary layer of the main stream, and strengthens the mixing of the fluid to improve the local heat transfer. Therefore, setting the secondary flow channels near the highest temperature can effectively increase the base temperature uniformity. Within the scope of calculation parameter, the temperature difference ratio of the staggered inlet and outlet unit on the base between with and without the secondary flow channel is (57.2–69.8) %. However, the influence of the secondary flow channels on the pumping power is slight.

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带有二级流道和交错进出口的新型微通道散热器的性能分析

针对微通道散热器基底温度分布不均匀的问题，本文提出了一种新型微通道散热器，该散热器具有二次流道和交错的进出口单元，可降低基底的最高温度。数值研究了进出水口之间、两个二次流道之间的间距以及雷诺数对底座温度均匀性的影响。研究发现，二次流可以打断和重建主流的边界层，加强流体的混合，改善局部传热。因此，在最高温度附近设置二次流道可有效提高基底温度均匀性。在计算参数范围内，有二次流道和无二次流道时，底部交错进出口单元的温差比为（57.2-69.8）%。不过，二级流道对泵送功率的影响很小。

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 Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.