Numerical investigation on hydrothermal characteristics of microchannel heat sinks with PCM inserts for effective thermal management applications

IF 4 3区 工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS
Naga Ramesh Korasikha, Karthikeya Sharma T, Amba Prasad Rao G
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引用次数: 0

Abstract

Purpose

The purpose of the paper is to develop an efficient thermal management system, which effectively dissipate the heat generated from the electronic devices. The present paper focuses at the modeling of microchannel heat sinks (MCHSs) with phase change materials (PCMs) insets to deal with the fluctuating heat generated from the electronic components.

Design/methodology/approach

In this paper, a novel approach is introduced to enhance the thermal performance of MCHSs through the integration of conjugate heat transfer and energy storage. Numerical investigations were conducted on six novel models of PCM-based hybrid MCHSs using ANSYS-FLUENT. The hydrothermal characteristics of six PCM-based hybrid MCHS models were analyzed and compared with an MCHS model without PCM.

Findings

The numerical model used for this study exhibited a good agreement with existing experimental and simulation results documented in the literature. The hybrid MCHS models developed in the present analysis showed superior thermal characteristics compared to MCHS without PCM. About 12% improvement in the thermal performance factor and a 7.3% reduction in thermal resistance were observed in the proposed MCHS models. A negligible influence of the PCM channel shape and aspect ratio (AR) was observed on the MCHS performance.

Research limitations/implications

As the present work is a numerical investigation, the computational time and computational cost requirements are the main implication for the research.

Practical implications

High pumping power requirement and expensive manufacturing methods of the microfluidic devices are the main practical implications. Leakage problem is also a challenge for development of these heat sinks.

Originality/value

The surge in the heat generated by electronic components is a limiting factor for the conventional MCHSs. To accommodate the surge, researchers have explored energy storage methods using PCM-based passive MCHS but these are effective only during the phase change process. To address this limitation, novel PCM-based hybrid MCHSs, which combine convective heat transfer with energy storage capabilities, have been modeled in the present work. There is an ample opportunity for further exploration of hybrid MCHSs with PCM.

用于有效热管理的PCM插片微通道散热器热液特性数值研究
本文的目的是开发一种高效的热管理系统,有效地散发电子设备产生的热量。本文重点研究了采用相变材料(PCMs)插入的微通道散热器(MCHSs)的建模,以处理电子元件产生的波动热量。设计/方法/方法本文介绍了一种通过结合共轭传热和能量存储来提高MCHSs热性能的新方法。利用ANSYS-FLUENT软件对6种基于pcm的新型混合MCHSs模型进行了数值研究。分析了6种基于PCM的混合MCHS模型的水热特性,并与不含PCM的MCHS模型进行了比较。研究结果:本研究中使用的数值模型与文献中记录的现有实验和模拟结果有很好的一致性。在本分析中开发的混合MCHS模型与没有PCM的MCHS相比,显示出更好的热特性。在提出的MCHS模型中,热性能因子提高了约12%,热阻降低了7.3%。PCM通道形状和宽高比(AR)对MCHS性能的影响可以忽略不计。由于本研究是数值研究,计算时间和计算成本需求是研究的主要影响因素。微流控器件的主要实际问题是泵送功率要求高和制造方法昂贵。泄漏问题也是这些散热器发展的一个挑战。原创性/价值电子元件产生的热量激增是传统MCHSs的限制因素。为了适应激增,研究人员已经探索了基于pcm的无源MCHS储能方法,但这些方法仅在相变过程中有效。为了解决这一限制,本研究对结合对流传热和能量储存能力的新型基于pcm的混合MCHSs进行了建模。有充分的机会进一步探索混合MCHSs与PCM。
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
CiteScore
9.50
自引率
11.90%
发文量
100
审稿时长
6-12 weeks
期刊介绍: The main objective of this international journal is to provide applied mathematicians, engineers and scientists engaged in computer-aided design and research in computational heat transfer and fluid dynamics, whether in academic institutions of industry, with timely and accessible information on the development, refinement and application of computer-based numerical techniques for solving problems in heat and fluid flow. - See more at: http://emeraldgrouppublishing.com/products/journals/journals.htm?id=hff#sthash.Kf80GRt8.dpuf
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