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Unsteady boundary layer flow of a micropolar fluid near a stagnation point with uniform suction or injection

Lok, Yian Yian and Amin, Norsarahaida and Pop, Loan (2007) Unsteady boundary layer flow of a micropolar fluid near a stagnation point with uniform suction or injection. Jurnal Teknologi, 46 (C). pp. 15-32. ISSN 0126-9797 (Print); 2180–3722 (Electronics)

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Abstract

This paper studies the effect of suction or injection on unsteady bounday layer flow of a micropolar fluid near the forward stagnation point of a permeable wall. The velocity of the external flow as well as that of suction or injection are assumed to start impulsively from rest and are maintained thereafter. The model is governed by a set of coupled partial differential equations that is solved numerically for some values of the suction, injection and material parameters. Profiles for the velocity, microrotation and skin friction coeffiecient are determinedand presented in tables and graphical forms. The results show that suction increases the skin friction while the opposite behaviour is observed for the case of injection. It is also found that an increase in the material parameter will enhance the flow near the wall. On the other hand, it can be seen that in the case of injection, longer time is required to approach the steady flow than in the case of suction

Item Type:Article
Additional Information:C (Sains & Matematik)
Uncontrolled Keywords:unsteady boundary layer flow, micropolar fluid, forward stagnation point, suction, injection
Subjects:Q Science > QA Mathematics
Divisions:Science
ID Code:5701
Deposited By: Pn Norhayati Abu Ruddin
Deposited On:19 Jun 2008 07:57
Last Modified:05 Jan 2014 07:08

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