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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| Format: | Article |
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Penerbit ukm
2006
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| Online Access: | http://journalarticle.ukm.my/1821/ http://www.ukm.my/~ppsmfst/jqma/index.html |
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| author | Nor Azizah M. Yacob, Roslinda Mohd Nazar , |
| author_facet | Nor Azizah M. Yacob, Roslinda Mohd Nazar , |
| author_sort | Nor Azizah M. Yacob, |
| building | Tun Sri Lanang Library |
| collection | Institutional Repository |
| content_provider | Universiti Kebangsaan Malaysia |
| content_source | UKM Journal Article Repository |
| continent | Asia |
| country | Malaysia |
| 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 |
| id | my-ukm.journal-1821 |
| institution | Universiti Kebangsaan Malaysia |
| publishDate | 2006 |
| publisher | Penerbit ukm |
| record_format | eprints |
| spelling | my-ukm.journal-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 |
| spellingShingle | Nor Azizah M. Yacob, Roslinda Mohd Nazar , Mixed convection boundary layer on a solid sphere with constant surface heat flux |
| title | 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_short | 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 |
| url | http://journalarticle.ukm.my/1821/ http://www.ukm.my/~ppsmfst/jqma/index.html |
| url_provider | http://journalarticle.ukm.my/ |