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...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Published: |
Elsevier SAS.
2003
|
| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/7237/ http://dx.doi.org/10.1016/S1290-0729(02)00027-3 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | 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 |
|---|