Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization

A model of rectangular microchannel heat sink (MCHS) with porous medium (PM) is developed. Aspect ratio of heat sink (HS) cell and length-width ratio of HS are optimized by numerical simulation method for entropy generation minimization (EGM) according to constructal theory. The effects of inlet Rey...

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Autores principales:	Wenlong Li, Zhihui Xie, Kun Xi, Shaojun Xia, Yanlin Ge
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	constructal theory entropy generation minimization microchannel heat sink porous medium electronics cooling generalized thermodynamic optimization Science Q Astrophysics QB460-466 Physics QC1-999
Acceso en línea:	https://doaj.org/article/b88362692dd8473fa3cb76c13a04699d
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spelling	oai:doaj.org-article:b88362692dd8473fa3cb76c13a04699d2021-11-25T17:30:34ZConstructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization10.3390/e231115281099-4300https://doaj.org/article/b88362692dd8473fa3cb76c13a04699d2021-11-01T00:00:00Zhttps://www.mdpi.com/1099-4300/23/11/1528https://doaj.org/toc/1099-4300A model of rectangular microchannel heat sink (MCHS) with porous medium (PM) is developed. Aspect ratio of heat sink (HS) cell and length-width ratio of HS are optimized by numerical simulation method for entropy generation minimization (EGM) according to constructal theory. The effects of inlet Reynolds number (<i>Re</i>) of coolant, heat flux on bottom, porosity and volume proportion of PM on dimensionless entropy generation rate (DEGR) are analyzed. From the results, there are optimal aspect ratios to minimize DEGR. Given the initial condition, DEGR is 33.10% lower than its initial value after the aspect ratio is optimized. With the increase of <i>Re</i>, the optimal aspect ratio declines, and the minimum DEGR drops as well. DEGR gets larger and the optimal aspect ratio remains constant with the increasing of heat flux on bottom. For the different volume proportion of PM, the optimal aspect ratios are diverse, but the minimum DEGR almost stays unchanged. The twice minimized DEGR, which results from aspect ratio and length-width ratio optimized simultaneously, is 10.70% lower than the once minimized DEGR. For a rectangular bottom, a lower DEGR can be reached by choosing the proper direction of fluid flow.Wenlong LiZhihui XieKun XiShaojun XiaYanlin GeMDPI AGarticleconstructal theoryentropy generation minimizationmicrochannel heat sinkporous mediumelectronics coolinggeneralized thermodynamic optimizationScienceQAstrophysicsQB460-466PhysicsQC1-999ENEntropy, Vol 23, Iss 1528, p 1528 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	constructal theory entropy generation minimization microchannel heat sink porous medium electronics cooling generalized thermodynamic optimization Science Q Astrophysics QB460-466 Physics QC1-999
spellingShingle	constructal theory entropy generation minimization microchannel heat sink porous medium electronics cooling generalized thermodynamic optimization Science Q Astrophysics QB460-466 Physics QC1-999 Wenlong Li Zhihui Xie Kun Xi Shaojun Xia Yanlin Ge Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization
description	A model of rectangular microchannel heat sink (MCHS) with porous medium (PM) is developed. Aspect ratio of heat sink (HS) cell and length-width ratio of HS are optimized by numerical simulation method for entropy generation minimization (EGM) according to constructal theory. The effects of inlet Reynolds number (<i>Re</i>) of coolant, heat flux on bottom, porosity and volume proportion of PM on dimensionless entropy generation rate (DEGR) are analyzed. From the results, there are optimal aspect ratios to minimize DEGR. Given the initial condition, DEGR is 33.10% lower than its initial value after the aspect ratio is optimized. With the increase of <i>Re</i>, the optimal aspect ratio declines, and the minimum DEGR drops as well. DEGR gets larger and the optimal aspect ratio remains constant with the increasing of heat flux on bottom. For the different volume proportion of PM, the optimal aspect ratios are diverse, but the minimum DEGR almost stays unchanged. The twice minimized DEGR, which results from aspect ratio and length-width ratio optimized simultaneously, is 10.70% lower than the once minimized DEGR. For a rectangular bottom, a lower DEGR can be reached by choosing the proper direction of fluid flow.
format	article
author	Wenlong Li Zhihui Xie Kun Xi Shaojun Xia Yanlin Ge
author_facet	Wenlong Li Zhihui Xie Kun Xi Shaojun Xia Yanlin Ge
author_sort	Wenlong Li
title	Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization
title_short	Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization
title_full	Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization
title_fullStr	Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization
title_full_unstemmed	Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization
title_sort	constructal optimization of rectangular microchannel heat sink with porous medium for entropy generation minimization
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b88362692dd8473fa3cb76c13a04699d
work_keys_str_mv	AT wenlongli constructaloptimizationofrectangularmicrochannelheatsinkwithporousmediumforentropygenerationminimization AT zhihuixie constructaloptimizationofrectangularmicrochannelheatsinkwithporousmediumforentropygenerationminimization AT kunxi constructaloptimizationofrectangularmicrochannelheatsinkwithporousmediumforentropygenerationminimization AT shaojunxia constructaloptimizationofrectangularmicrochannelheatsinkwithporousmediumforentropygenerationminimization AT yanlinge constructaloptimizationofrectangularmicrochannelheatsinkwithporousmediumforentropygenerationminimization
_version_	1718412307339411456

Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization

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