Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface
The unsteady mixed convection boundary-layer flow of a micropolar fluid near the region of the stagnation point on a double-infinite vertical flat plate is studied. It is assumed that the unsteadiness is caused by the impulsive motion of the free stream velocity and by sudden increase or sudden decr...
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| Format: | Article |
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Elsevier Masson SAS.
2006
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| Online Access: | http://eprints.utm.my/7274/ |
| _version_ | 1848891435234885632 |
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| author | Lok, Yian Yian Amin, Norsarahaida Pop, Ioan |
| author_facet | Lok, Yian Yian Amin, Norsarahaida Pop, Ioan |
| author_sort | Lok, Yian Yian |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | The unsteady mixed convection boundary-layer flow of a micropolar fluid near the region of the stagnation point on a double-infinite vertical flat plate is studied. It is assumed that the unsteadiness is caused by the impulsive motion of the free stream velocity and by sudden increase or sudden decrease in the surface temperature from the uniform ambient temperature. The problem is reduced to a system of non-dimensional partial differential equations, which is solved numerically using the Keller-box method. This method may present well-behaved solutions for the transient (small time) solution and those of the steady-state flow (large time) solution. It was found that there is a smooth transition from the small-time solution (initial unsteady-state flow) to the large-time solution (final steady-state flow). Further, it is shown that for both assisting and opposing cases and a fixed value of the Prandtl number, the reduced steady-state skin friction and the steady-state heat transfer from the wall (or Nusselt number) decrease with the increase of the material parameter. On the other hand, it is shown that with the increase of the Prandtl number and a fixed value of the material parameter, the reduced steady-state skin friction decreases when the flow is assisting and it increases when the flow is opposing |
| first_indexed | 2025-11-15T20:57:55Z |
| format | Article |
| id | utm-7274 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T20:57:55Z |
| publishDate | 2006 |
| publisher | Elsevier Masson SAS. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utm-72742009-01-02T01:39:56Z http://eprints.utm.my/7274/ Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface Lok, Yian Yian Amin, Norsarahaida Pop, Ioan QA Mathematics The unsteady mixed convection boundary-layer flow of a micropolar fluid near the region of the stagnation point on a double-infinite vertical flat plate is studied. It is assumed that the unsteadiness is caused by the impulsive motion of the free stream velocity and by sudden increase or sudden decrease in the surface temperature from the uniform ambient temperature. The problem is reduced to a system of non-dimensional partial differential equations, which is solved numerically using the Keller-box method. This method may present well-behaved solutions for the transient (small time) solution and those of the steady-state flow (large time) solution. It was found that there is a smooth transition from the small-time solution (initial unsteady-state flow) to the large-time solution (final steady-state flow). Further, it is shown that for both assisting and opposing cases and a fixed value of the Prandtl number, the reduced steady-state skin friction and the steady-state heat transfer from the wall (or Nusselt number) decrease with the increase of the material parameter. On the other hand, it is shown that with the increase of the Prandtl number and a fixed value of the material parameter, the reduced steady-state skin friction decreases when the flow is assisting and it increases when the flow is opposing Elsevier Masson SAS. 2006 Article PeerReviewed Lok, Yian Yian and Amin, Norsarahaida and Pop, Ioan (2006) Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface. International Journal of Thermal Sciences, 45 (12). pp. 1149-1157. ISSN 1290-0729 http://dx.doi.org/10.1016/j.ijthermalsci.2006.01.015 10.1016/j.ijthermalsci.2006.01.015 |
| spellingShingle | QA Mathematics Lok, Yian Yian Amin, Norsarahaida Pop, Ioan Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface |
| title | Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface |
| title_full | Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface |
| title_fullStr | Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface |
| title_full_unstemmed | Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface |
| title_short | Unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface |
| title_sort | unsteady mixed convection flow of a micropolar fluid near the stagnation point on a vertical surface |
| topic | QA Mathematics |
| url | http://eprints.utm.my/7274/ http://eprints.utm.my/7274/ http://eprints.utm.my/7274/ |