Numerical study of heat transfer and flow structure over a microscale backstep

This study presents a two and three-dimensional numerical simulations of a flow-through a sudden expansion and contraction microchannels. The finite element method was used to discretize the equations governing the physical model. By carrying out the numerical simulations, results indicate the appar...

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Main Authors:	Hassnia Hajji, Lioua Kolsi, Kaouther Ghachem, Chemseddine Maatki, Ahmed Kadhim Hussein, Mohamed Naceur Borjini
Format:	Article
Language:	English
Published:	Elsevier 2021-06-01
Series:	Alexandria Engineering Journal
Subjects:	Micro fluidics Sudden expansion microchannel Reynolds number Nusselt number
Online Access:	http://www.sciencedirect.com/science/article/pii/S1110016821000193

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record_format	Article
spelling	doaj-ec120ad2a62f45768dc3dcc776696a262021-06-02T18:17:01ZengElsevierAlexandria Engineering Journal1110-01682021-06-0160327592768Numerical study of heat transfer and flow structure over a microscale backstepHassnia Hajji0Lioua Kolsi1Kaouther Ghachem2Chemseddine Maatki3Ahmed Kadhim Hussein4Mohamed Naceur Borjini5Laboratory of Metrology and Energy systems, National Engineering School of Monastir, University of Monastir, TunisiaDepartment of Mechanical Engineering, College of Engineering, Ha’il University, Ha’il City, Saudi Arabia; Corresponding author.Department of Industrial Engineering and Systems, College of Engineering, Princess Nourah bint Abdulrahman University, Riyadh, Saudi ArabiaDepartment of Mechanical Engineering, College of Engineering, Al Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi ArabiaDepartment of Mechanical Engineering, University of Babylon, Babylon City, Hilla, IraqLaboratory of Metrology and Energy systems, National Engineering School of Monastir, University of Monastir, TunisiaThis study presents a two and three-dimensional numerical simulations of a flow-through a sudden expansion and contraction microchannels. The finite element method was used to discretize the equations governing the physical model. By carrying out the numerical simulations, results indicate the apparition of a separate vortex, situated in the corner after the sudden expansion of the microchannel for low Reynolds numbers. For high values of Reynolds number and expansion ratios, the vortex separation length increases. Also, the three-dimensional character of the flow is more pronounced for higher Reynolds numbers.http://www.sciencedirect.com/science/article/pii/S1110016821000193Micro fluidicsSudden expansion microchannelReynolds numberNusselt number
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Hassnia Hajji Lioua Kolsi Kaouther Ghachem Chemseddine Maatki Ahmed Kadhim Hussein Mohamed Naceur Borjini
spellingShingle	Hassnia Hajji Lioua Kolsi Kaouther Ghachem Chemseddine Maatki Ahmed Kadhim Hussein Mohamed Naceur Borjini Numerical study of heat transfer and flow structure over a microscale backstep Alexandria Engineering Journal Micro fluidics Sudden expansion microchannel Reynolds number Nusselt number
author_facet	Hassnia Hajji Lioua Kolsi Kaouther Ghachem Chemseddine Maatki Ahmed Kadhim Hussein Mohamed Naceur Borjini
author_sort	Hassnia Hajji
title	Numerical study of heat transfer and flow structure over a microscale backstep
title_short	Numerical study of heat transfer and flow structure over a microscale backstep
title_full	Numerical study of heat transfer and flow structure over a microscale backstep
title_fullStr	Numerical study of heat transfer and flow structure over a microscale backstep
title_full_unstemmed	Numerical study of heat transfer and flow structure over a microscale backstep
title_sort	numerical study of heat transfer and flow structure over a microscale backstep
publisher	Elsevier
series	Alexandria Engineering Journal
issn	1110-0168
publishDate	2021-06-01
description	This study presents a two and three-dimensional numerical simulations of a flow-through a sudden expansion and contraction microchannels. The finite element method was used to discretize the equations governing the physical model. By carrying out the numerical simulations, results indicate the apparition of a separate vortex, situated in the corner after the sudden expansion of the microchannel for low Reynolds numbers. For high values of Reynolds number and expansion ratios, the vortex separation length increases. Also, the three-dimensional character of the flow is more pronounced for higher Reynolds numbers.
topic	Micro fluidics Sudden expansion microchannel Reynolds number Nusselt number
url	http://www.sciencedirect.com/science/article/pii/S1110016821000193
work_keys_str_mv	AT hassniahajji numericalstudyofheattransferandflowstructureoveramicroscalebackstep AT liouakolsi numericalstudyofheattransferandflowstructureoveramicroscalebackstep AT kaoutherghachem numericalstudyofheattransferandflowstructureoveramicroscalebackstep AT chemseddinemaatki numericalstudyofheattransferandflowstructureoveramicroscalebackstep AT ahmedkadhimhussein numericalstudyofheattransferandflowstructureoveramicroscalebackstep AT mohamednaceurborjini numericalstudyofheattransferandflowstructureoveramicroscalebackstep
_version_	1721402348678414336

Numerical study of heat transfer and flow structure over a microscale backstep

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