Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs

This study aims to investigate heat transfer and flow characteristics of ethylene glycol/water (EGW) and CuO–EGW nanofluids in circular tubes with and without trapezoid ribs. Nusselt number and friction factor in tubes with trapezoid ribs are analysed under a constant heat flux by changing rib botto...

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Autores principales:	Wang Wei, Zhang Bo, Cui Lanhua, Zheng Hongwei, Klemeš Jiří Jaromír, Wang Jin
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	nanofluids trapezoid rib heat transfer enhancement angle friction factor Physics QC1-999
Acceso en línea:	https://doaj.org/article/c6490946f4394e18b2b2712efb496383
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spelling	oai:doaj.org-article:c6490946f4394e18b2b2712efb4963832021-12-05T14:11:01ZNumerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs2391-547110.1515/phys-2021-0022https://doaj.org/article/c6490946f4394e18b2b2712efb4963832021-04-01T00:00:00Zhttps://doi.org/10.1515/phys-2021-0022https://doaj.org/toc/2391-5471This study aims to investigate heat transfer and flow characteristics of ethylene glycol/water (EGW) and CuO–EGW nanofluids in circular tubes with and without trapezoid ribs. Nusselt number and friction factor in tubes with trapezoid ribs are analysed under a constant heat flux by changing rib bottom angles. This study compares the convective heat transfer coefficients of 6 vol.% CuO–EGW nanofluid and base fluid. It is found that under a constant Reynolds number, the Nusselt number and friction factor for CuO–EGW nanofluid and base fluid increase with an increase in the inclination angle. The Nusselt number for the CuO–EGW nanofluid in the tube with 75° rib bottom angle averagely increases by 135.8% compared to that in the smooth tube, and the performance evaluation criterion is 1.64.Wang WeiZhang BoCui LanhuaZheng HongweiKlemeš Jiří JaromírWang JinDe Gruyterarticlenanofluidstrapezoid ribheat transfer enhancementanglefriction factorPhysicsQC1-999ENOpen Physics, Vol 19, Iss 1, Pp 224-233 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nanofluids trapezoid rib heat transfer enhancement angle friction factor Physics QC1-999
spellingShingle	nanofluids trapezoid rib heat transfer enhancement angle friction factor Physics QC1-999 Wang Wei Zhang Bo Cui Lanhua Zheng Hongwei Klemeš Jiří Jaromír Wang Jin Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs
description	This study aims to investigate heat transfer and flow characteristics of ethylene glycol/water (EGW) and CuO–EGW nanofluids in circular tubes with and without trapezoid ribs. Nusselt number and friction factor in tubes with trapezoid ribs are analysed under a constant heat flux by changing rib bottom angles. This study compares the convective heat transfer coefficients of 6 vol.% CuO–EGW nanofluid and base fluid. It is found that under a constant Reynolds number, the Nusselt number and friction factor for CuO–EGW nanofluid and base fluid increase with an increase in the inclination angle. The Nusselt number for the CuO–EGW nanofluid in the tube with 75° rib bottom angle averagely increases by 135.8% compared to that in the smooth tube, and the performance evaluation criterion is 1.64.
format	article
author	Wang Wei Zhang Bo Cui Lanhua Zheng Hongwei Klemeš Jiří Jaromír Wang Jin
author_facet	Wang Wei Zhang Bo Cui Lanhua Zheng Hongwei Klemeš Jiří Jaromír Wang Jin
author_sort	Wang Wei
title	Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs
title_short	Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs
title_full	Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs
title_fullStr	Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs
title_full_unstemmed	Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs
title_sort	numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/c6490946f4394e18b2b2712efb496383
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Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs

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