Proceedings of the
International Conference on Mechanical Engineering 2009
(ICME2009) 26- 28 December 2009, Dhaka, Bangladesh

ICME09-FM-31

EFFECTS OF RADIATION AND PRESSURE WORK ON MHD
NATURAL CONVECTION FLOW AROUND A SPHERE

M. A. Alim1 and Tahmina Akhter2
1Department of Mathematics, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
2Department of Mathematics, The University of Asia Pacific, Dhaka, Bangladesh

ABSTRACT

The effects of radiation and pressure work on magnetohydrodynamic (MHD) natural convection flow on a sphere have been investigated in this paper. The governing boundary layer equations are first transformed into a non-dimensional form and the resulting nonlinear partial differential equations are then solved numerically using finite-difference method with Keller-box scheme. We have focused our attention on the evaluation of shear stress in terms of local skin friction and rate of heat transfer in terms of local Nusselt number, velocity as well as temperature profiles. Numerical results have been shown graphically and tabular form for some selected values of parameters set consisting of radiation parameter Rd, pressure work parameter Ge, Magnetohydrodynamic parameter M and the Prandtl number Pr.
 

Keywords: Thermal Radiation, Natural Convection, Pressure Work, Magnetohydrodynamics.

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