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Effect of Hall current on MHD natural convection flow from vertical permeable flat plate with uniform surface heat flux

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  • 1. Department of Mathematics, University of Dhaka, Dhaka 1000, Bangladesh;
    2. Department of Mathematics, COMSATS Institute of Information Technology, Park Road, Chak Shahzad, Islamabad 44000, Pakistan

Received date: 2010-09-17

  Revised date: 2011-05-30

  Online published: 2011-09-02

Abstract

The effect of the Hall current on the magnetohydrodynamic (MHD) natural convection flow from a vertical permeable flat plate with a uniform heat flux is analyzed in the presence of a transverse magnetic field. It is assumed that the induced magnetic field is negligible compared with the imposed magnetic field. The boundary layer equations are reduced to a suitable form by employing the free variable formulation (FVF) and the stream function formulation (SFF). The parabolic equations obtained from FVF are numerically integrated with the help of a straightforward finite difference method. Moreover, the nonsimilar system of equations obtained from SFF is solved by using a local nonsimilarity method, for the whole range of the local transpiration parameter ζ. Consideration is also given to the regions where the local transpiration parameter ζ is small or large enough. However, in these particular regions, solutions are acquired with the aid of a regular perturbation method. The effects of the magnetic field M and the Hall parameter m on the local skin friction coefficient and the local Nusselt number coefficient are graphically shown for smaller values of the Prandtl number Pr (= 0.005, 0.01, 0.05).  Furthermore, the velocity and temperature profiles are also drawn from various values of the local transpiration parameter ζ.

Cite this article

L. K. SAHA;S. SIDDIQA;M. A. HOSSAIN . Effect of Hall current on MHD natural convection flow from vertical permeable flat plate with uniform surface heat flux[J]. Applied Mathematics and Mechanics, 2011 , 32(9) : 1127 -1146 . DOI: 10.1007/s10483-011-1487-9

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