An innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application

The present study has been numerically surveyed the effect of different expansion angles on the heat transfer and pressure drop characteristics of a sudden expansion in a microtube. For this purpose, Cu/water nanofluids flowing with Reynolds numbers (Re) of 10, 25, 50, and 100 through expansion angl...

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Autores principales:	Mohammad Reza Safaei, Mohamed Abdelghany Elkotb, Abdullah M. Alsharif, Ibrahim B. Mansir, Sagr Alamri, Vineet Tirth, Marjan Goodarzi
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Sudden micro expansion Nanofluid Electronic cooling Heat transfer Coanda effect Expansion angle Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/212a2c98b27b4323ba06821f62b931fc
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id	oai:doaj.org-article:212a2c98b27b4323ba06821f62b931fc
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spelling	oai:doaj.org-article:212a2c98b27b4323ba06821f62b931fc2021-11-12T04:33:54ZAn innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application2214-157X10.1016/j.csite.2021.101637https://doaj.org/article/212a2c98b27b4323ba06821f62b931fc2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214157X21008005https://doaj.org/toc/2214-157XThe present study has been numerically surveyed the effect of different expansion angles on the heat transfer and pressure drop characteristics of a sudden expansion in a microtube. For this purpose, Cu/water nanofluids flowing with Reynolds numbers (Re) of 10, 25, 50, and 100 through expansion angles of 30°, 45°, 60°, and 90° were modeled. Governing equations were solved by the finite volume method (FVM). The findings indicated that the heat transfer coefficient (HTC) could enhance by nanoparticles concentration and Re augmentation. Also, It was revealed that HTC of a sudden expansion with an angle of 45° has optimum hydrodynamic performance; then, sudden expansions of 30°, 90°, and 60° are followed. The highest HTC was achieved for a microtube containing 4 vol% nanofluids at Re = 100 with a 45° expansion angle, 43.63% higher than conventional expansion angle (90°) working with distilled water at Re = 10. By comparing HTC at various angles, it can be found that there is a 14.57% further HTC by changing the expansion angle from α = 90° with α = 45°. Furthermore, the pressure drop investigation showed that the expansion angle with α = 30° has the lowest pressure drop. In contrast, α = 45° produced the highest pressure drop because of giant vortices created along the tube wall. The velocity streamlines and contours explained the reason for a lower pressure drop of α = 30°, 45°, and 60° which was regular streamlines along the tube wall due to the Coanda effect.Mohammad Reza SafaeiMohamed Abdelghany ElkotbAbdullah M. AlsharifIbrahim B. MansirSagr AlamriVineet TirthMarjan GoodarziElsevierarticleSudden micro expansionNanofluidElectronic coolingHeat transferCoanda effectExpansion angleEngineering (General). Civil engineering (General)TA1-2040ENCase Studies in Thermal Engineering, Vol 28, Iss , Pp 101637- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Sudden micro expansion Nanofluid Electronic cooling Heat transfer Coanda effect Expansion angle Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Sudden micro expansion Nanofluid Electronic cooling Heat transfer Coanda effect Expansion angle Engineering (General). Civil engineering (General) TA1-2040 Mohammad Reza Safaei Mohamed Abdelghany Elkotb Abdullah M. Alsharif Ibrahim B. Mansir Sagr Alamri Vineet Tirth Marjan Goodarzi An innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application
description	The present study has been numerically surveyed the effect of different expansion angles on the heat transfer and pressure drop characteristics of a sudden expansion in a microtube. For this purpose, Cu/water nanofluids flowing with Reynolds numbers (Re) of 10, 25, 50, and 100 through expansion angles of 30°, 45°, 60°, and 90° were modeled. Governing equations were solved by the finite volume method (FVM). The findings indicated that the heat transfer coefficient (HTC) could enhance by nanoparticles concentration and Re augmentation. Also, It was revealed that HTC of a sudden expansion with an angle of 45° has optimum hydrodynamic performance; then, sudden expansions of 30°, 90°, and 60° are followed. The highest HTC was achieved for a microtube containing 4 vol% nanofluids at Re = 100 with a 45° expansion angle, 43.63% higher than conventional expansion angle (90°) working with distilled water at Re = 10. By comparing HTC at various angles, it can be found that there is a 14.57% further HTC by changing the expansion angle from α = 90° with α = 45°. Furthermore, the pressure drop investigation showed that the expansion angle with α = 30° has the lowest pressure drop. In contrast, α = 45° produced the highest pressure drop because of giant vortices created along the tube wall. The velocity streamlines and contours explained the reason for a lower pressure drop of α = 30°, 45°, and 60° which was regular streamlines along the tube wall due to the Coanda effect.
format	article
author	Mohammad Reza Safaei Mohamed Abdelghany Elkotb Abdullah M. Alsharif Ibrahim B. Mansir Sagr Alamri Vineet Tirth Marjan Goodarzi
author_facet	Mohammad Reza Safaei Mohamed Abdelghany Elkotb Abdullah M. Alsharif Ibrahim B. Mansir Sagr Alamri Vineet Tirth Marjan Goodarzi
author_sort	Mohammad Reza Safaei
title	An innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application
title_short	An innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application
title_full	An innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application
title_fullStr	An innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application
title_full_unstemmed	An innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application
title_sort	innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: electronic cooling application
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/212a2c98b27b4323ba06821f62b931fc
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An innovative design of a high strength and low weight sudden micro expansion by considering a nanofluid: Electronic cooling application

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