Heat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins

A novel microchannel heat sink with oval-shaped micro pin fins (MOPF) is proposed and the characteristics of fluid flow and heat transfer are studied numerically for Reynolds number (<i>Re</i>) ranging from 157 to 668. In order to study the influence of geometry on flow and heat transfer...

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Autores principales:	Yuting Jia, Jianwei Huang, Jingtao Wang, Hongwei Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	microchannel oval-shaped micro pin fins heat transfer enhancement fluid flow structural design Science Q Astrophysics QB460-466 Physics QC1-999
Acceso en línea:	https://doaj.org/article/9aa2c8507d3844a0884886290e0c8c1d
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spelling	oai:doaj.org-article:9aa2c8507d3844a0884886290e0c8c1d2021-11-25T17:30:00ZHeat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins10.3390/e231114821099-4300https://doaj.org/article/9aa2c8507d3844a0884886290e0c8c1d2021-11-01T00:00:00Zhttps://www.mdpi.com/1099-4300/23/11/1482https://doaj.org/toc/1099-4300A novel microchannel heat sink with oval-shaped micro pin fins (MOPF) is proposed and the characteristics of fluid flow and heat transfer are studied numerically for Reynolds number (<i>Re</i>) ranging from 157 to 668. In order to study the influence of geometry on flow and heat transfer characteristics, three non-dimensional variables are defined, such as the fin axial length ratio (<i>α</i>), width ratio (<i>β</i>), and height ratio (<i>γ</i>). The thermal enhancement factor (<i>η</i>) is adopted as an evaluation criterion to evaluate the best comprehensive thermal-hydraulic performance of MOPF. Results indicate that the oval-shaped pin fins in the microchannel can effectively prevent the rise of heat surface temperature along the flow direction, which improves the temperature distribution uniformity. In addition, results show that for the studied Reynolds number range and microchannel geometries in this paper, the thermal enhancement factor <i>η</i> increases firstly and then decreases with the increase of <i>α</i> and <i>β</i>. In addition, except for <i>Re</i> = 157, <i>η</i> decreases first and then increases with the increase of the fin height ratio <i>γ</i>. The thermal enhancement factor for MOPF with <i>α</i> = 4, <i>β</i> = 0.3, and <i>γ</i> = 0.5 achieves 1.56 at <i>Re</i> = 668. The results can provide a theoretical basis for the design of a microchannel heat exchanger.Yuting JiaJianwei HuangJingtao WangHongwei LiMDPI AGarticlemicrochanneloval-shaped micro pin finsheat transfer enhancementfluid flowstructural designScienceQAstrophysicsQB460-466PhysicsQC1-999ENEntropy, Vol 23, Iss 1482, p 1482 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	microchannel oval-shaped micro pin fins heat transfer enhancement fluid flow structural design Science Q Astrophysics QB460-466 Physics QC1-999
spellingShingle	microchannel oval-shaped micro pin fins heat transfer enhancement fluid flow structural design Science Q Astrophysics QB460-466 Physics QC1-999 Yuting Jia Jianwei Huang Jingtao Wang Hongwei Li Heat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins
description	A novel microchannel heat sink with oval-shaped micro pin fins (MOPF) is proposed and the characteristics of fluid flow and heat transfer are studied numerically for Reynolds number (<i>Re</i>) ranging from 157 to 668. In order to study the influence of geometry on flow and heat transfer characteristics, three non-dimensional variables are defined, such as the fin axial length ratio (<i>α</i>), width ratio (<i>β</i>), and height ratio (<i>γ</i>). The thermal enhancement factor (<i>η</i>) is adopted as an evaluation criterion to evaluate the best comprehensive thermal-hydraulic performance of MOPF. Results indicate that the oval-shaped pin fins in the microchannel can effectively prevent the rise of heat surface temperature along the flow direction, which improves the temperature distribution uniformity. In addition, results show that for the studied Reynolds number range and microchannel geometries in this paper, the thermal enhancement factor <i>η</i> increases firstly and then decreases with the increase of <i>α</i> and <i>β</i>. In addition, except for <i>Re</i> = 157, <i>η</i> decreases first and then increases with the increase of the fin height ratio <i>γ</i>. The thermal enhancement factor for MOPF with <i>α</i> = 4, <i>β</i> = 0.3, and <i>γ</i> = 0.5 achieves 1.56 at <i>Re</i> = 668. The results can provide a theoretical basis for the design of a microchannel heat exchanger.
format	article
author	Yuting Jia Jianwei Huang Jingtao Wang Hongwei Li
author_facet	Yuting Jia Jianwei Huang Jingtao Wang Hongwei Li
author_sort	Yuting Jia
title	Heat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins
title_short	Heat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins
title_full	Heat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins
title_fullStr	Heat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins
title_full_unstemmed	Heat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins
title_sort	heat transfer and fluid flow characteristics of microchannel with oval-shaped micro pin fins
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9aa2c8507d3844a0884886290e0c8c1d
work_keys_str_mv	AT yutingjia heattransferandfluidflowcharacteristicsofmicrochannelwithovalshapedmicropinfins AT jianweihuang heattransferandfluidflowcharacteristicsofmicrochannelwithovalshapedmicropinfins AT jingtaowang heattransferandfluidflowcharacteristicsofmicrochannelwithovalshapedmicropinfins AT hongweili heattransferandfluidflowcharacteristicsofmicrochannelwithovalshapedmicropinfins
_version_	1718412300215386112

Heat Transfer and Fluid Flow Characteristics of Microchannel with Oval-Shaped Micro Pin Fins

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