Mixed convection boundary layer on a solid sphere with constant surface heat flux

Mixed convection boundary layer on a solid sphere with constant surface heat flux

The steady mixed convection boundary layer flow of an incompressible viscous fluid on a solid sphere with a constant surface heat flux qw is considered for both the assisting and the opposing flow cases. The transformed governing equations of the non-similar boundary layers are solved numerically...

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Main Authors: Nor Azizah M. Yacob, Roslinda Mohd Nazar
Format: Article
Published: Penerbit ukm 2006
Online Access:http://journalarticle.ukm.my/1821/
http://journalarticle.ukm.my/1821/
id ukm-1821
recordtype eprints
spelling ukm-18212011-06-21T07:10:09Z http://journalarticle.ukm.my/1821/ Mixed convection boundary layer on a solid sphere with constant surface heat flux Nor Azizah M. Yacob, Roslinda Mohd Nazar , The steady mixed convection boundary layer flow of an incompressible viscous fluid on a solid sphere with a constant surface heat flux qw is considered for both the assisting and the opposing flow cases. The transformed governing equations of the non-similar boundary layers are solved numerically using the Keller-box method. Numerical results are presented for different values of the mixed convection parameter λ and for the Prandtl number, Pr = 0.7 (air) and Pr = 7 (water). The numerical results obtained include local skin friction coefficient Cf, local wall temperature distribution θw (x) , velocity and temperature profiles. It is found that the assisting flow (λ > 0) delays the separation of the boundary layers, and if the assisting flow is strong enough, it suppresses the separation completely. On the other hand, the opposing flow (λ < 0) brings the separation point nearer to the lower stagnation point ( x ≈ 0 ) of the sphere, and for sufficiently strong opposing flows, there will not be a boundary layer on the sphere Penerbit ukm 2006-07 Article PeerReviewed Nor Azizah M. Yacob, and Roslinda Mohd Nazar , (2006) Mixed convection boundary layer on a solid sphere with constant surface heat flux. Journal of Quality Measurement and Analysis, 2 (1). pp. 63-74. ISSN 1823-5670 http://www.ukm.my/~ppsmfst/jqma/index.html
repository_type Digital Repository
institution_category Local University
institution Universiti Kebangasaan Malaysia
building UKM Institutional Repository
collection Online Access
description The steady mixed convection boundary layer flow of an incompressible viscous fluid on a solid sphere with a constant surface heat flux qw is considered for both the assisting and the opposing flow cases. The transformed governing equations of the non-similar boundary layers are solved numerically using the Keller-box method. Numerical results are presented for different values of the mixed convection parameter λ and for the Prandtl number, Pr = 0.7 (air) and Pr = 7 (water). The numerical results obtained include local skin friction coefficient Cf, local wall temperature distribution θw (x) , velocity and temperature profiles. It is found that the assisting flow (λ > 0) delays the separation of the boundary layers, and if the assisting flow is strong enough, it suppresses the separation completely. On the other hand, the opposing flow (λ < 0) brings the separation point nearer to the lower stagnation point ( x ≈ 0 ) of the sphere, and for sufficiently strong opposing flows, there will not be a boundary layer on the sphere
format Article
author Nor Azizah M. Yacob,
Roslinda Mohd Nazar ,
spellingShingle Nor Azizah M. Yacob,
Roslinda Mohd Nazar ,
Mixed convection boundary layer on a solid sphere with constant surface heat flux
author_facet Nor Azizah M. Yacob,
Roslinda Mohd Nazar ,
author_sort Nor Azizah M. Yacob,
title Mixed convection boundary layer on a solid sphere with constant surface heat flux
title_short Mixed convection boundary layer on a solid sphere with constant surface heat flux
title_full Mixed convection boundary layer on a solid sphere with constant surface heat flux
title_fullStr Mixed convection boundary layer on a solid sphere with constant surface heat flux
title_full_unstemmed Mixed convection boundary layer on a solid sphere with constant surface heat flux
title_sort mixed convection boundary layer on a solid sphere with constant surface heat flux
publisher Penerbit ukm
publishDate 2006
url http://journalarticle.ukm.my/1821/
http://journalarticle.ukm.my/1821/
first_indexed 2023-09-18T19:34:26Z
last_indexed 2023-09-18T19:34:26Z
_version_ 1777405176225726464

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