Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid
The steady mixed convection boundary layer flow of a micropolar fluid about a sphere with a constant surface temperature is considered for both the assisting and opposing flow cases. The transformed conservation equations of the non-similar boundary layers are solved numerically using a very efficie...
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| Format: | Article |
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Elsevier SAS.
2003
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| Online Access: | http://eprints.utm.my/7237/ |
| _version_ | 1848891429413191680 |
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| author | Nazar, Roslinda Amin, Norsarahaida Pop, Ioan |
| author_facet | Nazar, Roslinda Amin, Norsarahaida Pop, Ioan |
| author_sort | Nazar, Roslinda |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | The steady mixed convection boundary layer flow of a micropolar fluid about a sphere with a constant surface temperature is considered for both the assisting and opposing flow cases. The transformed conservation equations of the non-similar boundary layers are solved numerically using a very efficient finite-difference method known as the Keller-box scheme. Numerical results are presented for different values of the material and mixed convection parameters K and λ, respectively, and with the Prandtl number Pr = 0.7 and 7. It is found that assisting flow (λ > 0) delays separation of the boundary layer and can, if the assisting flow is strong enough, suppress it completely. The opposing flow (λ<0), on the other hand, brings the separation point nearer to the lower stagnation point of the sphere and for sufficiently strong opposing flows there will not be a boundary layer on the sphere. Some results were given in the form of tables. Such tables are very important and they can serve as a reference against which other exact or approximate solutions can be compared in the future |
| first_indexed | 2025-11-15T20:57:50Z |
| format | Article |
| id | utm-7237 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T20:57:50Z |
| publishDate | 2003 |
| publisher | Elsevier SAS. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utm-72372009-01-02T01:03:52Z http://eprints.utm.my/7237/ Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid Nazar, Roslinda Amin, Norsarahaida Pop, Ioan QA Mathematics The steady mixed convection boundary layer flow of a micropolar fluid about a sphere with a constant surface temperature is considered for both the assisting and opposing flow cases. The transformed conservation equations of the non-similar boundary layers are solved numerically using a very efficient finite-difference method known as the Keller-box scheme. Numerical results are presented for different values of the material and mixed convection parameters K and λ, respectively, and with the Prandtl number Pr = 0.7 and 7. It is found that assisting flow (λ > 0) delays separation of the boundary layer and can, if the assisting flow is strong enough, suppress it completely. The opposing flow (λ<0), on the other hand, brings the separation point nearer to the lower stagnation point of the sphere and for sufficiently strong opposing flows there will not be a boundary layer on the sphere. Some results were given in the form of tables. Such tables are very important and they can serve as a reference against which other exact or approximate solutions can be compared in the future Elsevier SAS. 2003 Article PeerReviewed Nazar, Roslinda and Amin, Norsarahaida and Pop, Ioan (2003) Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid. International Journal of Thermal Sciences, 42 (3). pp. 283-293. ISSN 1290-0729 http://dx.doi.org/10.1016/S1290-0729(02)00027-3 10.1016/S1290-0729(02)00027-3 |
| spellingShingle | QA Mathematics Nazar, Roslinda Amin, Norsarahaida Pop, Ioan Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid |
| title | Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid |
| title_full | Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid |
| title_fullStr | Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid |
| title_full_unstemmed | Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid |
| title_short | Mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid |
| title_sort | mixed convection boundary layer flow about an isothermal sphere in a micropolar fluid |
| topic | QA Mathematics |
| url | http://eprints.utm.my/7237/ http://eprints.utm.my/7237/ http://eprints.utm.my/7237/ |