A simulation study of thermal and hydraulic characteristics mini-channel circular heat sink: Effect of L-shaped multi-channel arrangement on flow maldistribution

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2024-12-16 DOI:10.1016/j.csite.2024.105655

Haider Ali Hussein

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Abstract

Mini channel cooling represents a highly effective methodology for the dissipation of thermal energy in electronic systems. The employment of a circular heat sink, characterized by novel configurations that incorporate various arrangements of innovative L-channel passages, facilitates the enhancement of thermal performance in circular mini channel heat sinks by mitigating the incidence of non-uniform coolant distribution. In this investigation, six distinct circular mini channel heat sinks were subjected to testing. Computational simulations were employed to assess their efficacy. The simulation results indicated that the innovative L-shaped channel passages exhibited superior heat transfer capabilities when compared to traditional (rectangular) channels. An increase in the Reynolds number from 491 to 983 corresponds with an enhancement in the performance index and a reduction in the maximum hotspot temperature, thereby leading to a decrease in the maximum thermal resistance. The L-channel passages for design (JMMLCCHS) demonstrated the most significant efficacy in diminishing coolant misdistribution and enhancing the performance index by a factor of 1.194 relative to the conventional design. The JMMLCCHS configuration recorded the most pronounced reduction in maximum thermal resistance, yielding a value of 0.33136 °C/W in contrast to 0.40587 °C/W for the traditional rectangular channel (TMMRCCHS). Moreover, the JMMLCCHS design exhibited the most substantial decrease in hotspot temperature, achieving an 8 °C reduction compared to the conventional design (TMMRCCHS) at a Reynolds number of 983.

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微型通道冷却是一种高效的电子系统热能耗散方法。圆形散热器采用了新颖的配置，将各种创新的 L 型通道排列在一起，减轻了冷却剂分布不均匀的影响，从而提高了圆形微型通道散热器的散热性能。在这项研究中，对六种不同的圆形微型通道散热器进行了测试。计算模拟用于评估它们的功效。模拟结果表明，与传统（矩形）通道相比，创新的 L 形通道具有更出色的传热能力。雷诺数从 491 增加到 983 时，性能指标提高，最大热点温度降低，从而导致最大热阻减小。与传统设计相比，L 型通道设计（JMMLCCHS）在减少冷却剂错配和提高性能指标方面的效果最为显著，提高了 1.194 倍。JMMLCCHS 配置的最大热阻降低最为明显，为 0.33136 °C/W，而传统矩形通道 (TMMRCCHS) 为 0.40587 °C/W。此外，JMMLCCHS 设计的热点温度降低幅度最大，在雷诺数为 983 时比传统设计（TMMRCCHS）降低了 8 °C。

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

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.