Far East Journal of Mechanical Engineering and Physics
Volume 1, Issue 1, Pages 63 - 78
(March 2010)
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VISCO-ELASTIC MHD FREE CONVECTIVE FLOW PAST A POROUS PLATE
Rita Choudhury and Kamal Debnath
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Abstract:
An unsteady laminar free convective flow of a visco-elastic fluid through a porous medium bounded by an infinite vertical porous plate whose temperature is oscillating with time about a constant non-zero mean value has been investigated under the influence of a uniform transverse magnetic field by taking into account the effect of energy dissipation. The fluid is assumed to be slightly conducting and hence the magnetic Reynolds number is much less than unity and the induced magnetic field is negligible in comparison with the transverse magnetic field. Under the usual Boussinesq’s approximation, the governing equations are solved analytically by using a regular perturbation technique. The expressions for the velocity, temperature, skin friction and the rate of heat transfer coefficient are obtained and presented graphically to observe the visco-elastic effects in combination of other flow parameters involved in the solution. |
| Keywords and phrases: visco-elastic, free convective, MHD, Porous plate, energy dissipation. |
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