3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement

In this paper, 3D Simulation of turbulent Fe3O4/Nanofluid annular flow and heat transfer in sudden expansion are presented. k-ε turbulence standard model and FVM are applied with Reynolds number different from 20000 to 50000, enlargement ratio (ER) varied 1.25, 1.67, and 2, , and volume concentratio...

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Autor principal:	Togun Hussein
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	abrupt enlargement nanofluids turbulent flow separation flow thermal performance Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/982e14b7717941a5a092ac13a15aba0c
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spelling	oai:doaj.org-article:982e14b7717941a5a092ac13a15aba0c2021-11-12T11:44:34Z3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement2267-124210.1051/e3sconf/202132104014https://doaj.org/article/982e14b7717941a5a092ac13a15aba0c2021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/97/e3sconf_icchmt2021_04014.pdfhttps://doaj.org/toc/2267-1242In this paper, 3D Simulation of turbulent Fe3O4/Nanofluid annular flow and heat transfer in sudden expansion are presented. k-ε turbulence standard model and FVM are applied with Reynolds number different from 20000 to 50000, enlargement ratio (ER) varied 1.25, 1.67, and 2, , and volume concentration of Fe3O4/Nanofluid ranging from 0 to 2% at constant heat flux of 4000 W/m2. The main significant effect on surface Nusselt number found by increases in volume concentration of Fe3O4/Nanofluid for all cases because of nanoparticles heat transport in normal fluid as produced increases in convection heat transfer. Also the results showed that suddenly increment in Nusselt number happened after the abrupt enlargement and reach to maximum value then reduction to the exit passage flow due to recirculation flow as created. Moreover the size of recirculation region enlarged with the rise in enlargement ratio and Reynolds number. Increase of volume Fe3O4/nanofluid enhances the Nusselt number due to nanoparticles heat transport in base fluid which raises the convection heat transfer. Increase of Reynolds number was observed with increased Nusselt number and maximum thermal performance was found with enlargement ratio of (ER=2) and 2% of volume concentration of Fe3O4/nanofluid. Further increases in Reynolds number and enlargement ratio found lead to reductions in static pressure.Togun HusseinEDP Sciencesarticleabrupt enlargementnanofluidsturbulent flowseparation flowthermal performanceEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 321, p 04014 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	abrupt enlargement nanofluids turbulent flow separation flow thermal performance Environmental sciences GE1-350
spellingShingle	abrupt enlargement nanofluids turbulent flow separation flow thermal performance Environmental sciences GE1-350 Togun Hussein 3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement
description	In this paper, 3D Simulation of turbulent Fe3O4/Nanofluid annular flow and heat transfer in sudden expansion are presented. k-ε turbulence standard model and FVM are applied with Reynolds number different from 20000 to 50000, enlargement ratio (ER) varied 1.25, 1.67, and 2, , and volume concentration of Fe3O4/Nanofluid ranging from 0 to 2% at constant heat flux of 4000 W/m2. The main significant effect on surface Nusselt number found by increases in volume concentration of Fe3O4/Nanofluid for all cases because of nanoparticles heat transport in normal fluid as produced increases in convection heat transfer. Also the results showed that suddenly increment in Nusselt number happened after the abrupt enlargement and reach to maximum value then reduction to the exit passage flow due to recirculation flow as created. Moreover the size of recirculation region enlarged with the rise in enlargement ratio and Reynolds number. Increase of volume Fe3O4/nanofluid enhances the Nusselt number due to nanoparticles heat transport in base fluid which raises the convection heat transfer. Increase of Reynolds number was observed with increased Nusselt number and maximum thermal performance was found with enlargement ratio of (ER=2) and 2% of volume concentration of Fe3O4/nanofluid. Further increases in Reynolds number and enlargement ratio found lead to reductions in static pressure.
format	article
author	Togun Hussein
author_facet	Togun Hussein
author_sort	Togun Hussein
title	3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement
title_short	3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement
title_full	3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement
title_fullStr	3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement
title_full_unstemmed	3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement
title_sort	3d numerical simulation of turbulent heat transfer and fe3o4/nanofluid annular flow in sudden enlargement
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/982e14b7717941a5a092ac13a15aba0c
work_keys_str_mv	AT togunhussein 3dnumericalsimulationofturbulentheattransferandfe3o4nanofluidannularflowinsuddenenlargement
_version_	1718430566955614208

3D Numerical simulation of turbulent heat transfer and Fe3O4/nanofluid annular flow in sudden enlargement

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