Mixed convection flow and heat transfer over different geometries of backward-facing step
Mixed convective flow and heat transfer characteristics for two-dimensional laminar flow in a channel with different geometries of a backward-facing step are presented for various Grashof numbers. The wall downstream of the step was maintained at a constant temperature; TH, while the upper wall was...
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Kuwait University
2013-12-01
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Online Access: | http://www.kuwaitjournals.org/jer_data/december_issue/12.pdf |
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doaj-0510a6ccb5de474f8088bf3d397aa87c2020-11-24T23:32:09ZengKuwait UniversityMaǧallaẗ al-abḥāṯ al-handasiyyaẗ2307-18772307-18852013-12-0113211233Mixed convection flow and heat transfer over different geometries of backward-facing stepBADER SHABEEB ALSHURAIAANMixed convective flow and heat transfer characteristics for two-dimensional laminar flow in a channel with different geometries of a backward-facing step are presented for various Grashof numbers. The wall downstream of the step was maintained at a constant temperature; TH, while the upper wall was considered isothermal at TC. The wall upstream of the step and the backward-facing step were considered as adiabatic surfaces. Navier-Stokes equations were employed to represent the transport phenomena in the channel. Further, the governing equations were solved using a finite element formulation based on the Galerkin method of weighted residuals. The numerical results of the reattachement lengths for recirculation region in a vertical channel with a backward-facing step (Re = 100) were validated by comparing them against documented studies in the literature. The results of this investigation show that the local skin friction coefficient increases with an increase in Grashof numbers. The results of this investigation show that configuration II of the backward-facing step (inclined) exhibited an absence of vortices for all values of Grashof numbers and consequently the minimum skin friction coefficient. However, configuration I is found to have the largest local skin friction coefficient.http://www.kuwaitjournals.org/jer_data/december_issue/12.pdfInclined stepmixed convectionnumerical analysisstep flow |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
BADER SHABEEB ALSHURAIAAN |
spellingShingle |
BADER SHABEEB ALSHURAIAAN Mixed convection flow and heat transfer over different geometries of backward-facing step Maǧallaẗ al-abḥāṯ al-handasiyyaẗ Inclined step mixed convection numerical analysis step flow |
author_facet |
BADER SHABEEB ALSHURAIAAN |
author_sort |
BADER SHABEEB ALSHURAIAAN |
title |
Mixed convection flow and heat transfer over different geometries of backward-facing step |
title_short |
Mixed convection flow and heat transfer over different geometries of backward-facing step |
title_full |
Mixed convection flow and heat transfer over different geometries of backward-facing step |
title_fullStr |
Mixed convection flow and heat transfer over different geometries of backward-facing step |
title_full_unstemmed |
Mixed convection flow and heat transfer over different geometries of backward-facing step |
title_sort |
mixed convection flow and heat transfer over different geometries of backward-facing step |
publisher |
Kuwait University |
series |
Maǧallaẗ al-abḥāṯ al-handasiyyaẗ |
issn |
2307-1877 2307-1885 |
publishDate |
2013-12-01 |
description |
Mixed convective flow and heat transfer characteristics for two-dimensional laminar flow in a channel with different geometries of a backward-facing step are presented for various Grashof numbers. The wall downstream of the step was maintained at a constant temperature; TH, while the upper wall was considered isothermal at TC. The wall upstream of the step and the backward-facing step were considered as adiabatic surfaces. Navier-Stokes equations were employed to represent the transport phenomena in the channel. Further, the governing equations were solved using a finite element formulation based on the Galerkin method of weighted residuals. The numerical results of the reattachement lengths for recirculation region in a vertical channel with a backward-facing step (Re = 100) were validated by comparing them against documented studies in the literature. The results of this investigation show that the local skin friction coefficient increases with an increase in Grashof numbers. The results of this investigation show that configuration II of the backward-facing step (inclined) exhibited an absence of vortices for all values of Grashof numbers and consequently the minimum skin friction coefficient. However, configuration I is found to have the largest local skin friction coefficient. |
topic |
Inclined step mixed convection numerical analysis step flow |
url |
http://www.kuwaitjournals.org/jer_data/december_issue/12.pdf |
work_keys_str_mv |
AT badershabeebalshuraiaan mixedconvectionflowandheattransferoverdifferentgeometriesofbackwardfacingstep |
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1725535071654379520 |