Open AccessEffects of Thermal Diffusion and Viscous Dissipation on Unsteady MHD Free Convection Flow Past a Vertical Porous Plate Under Oscillatory Suction Velocity with Heat Sink
Author(s) -
B. Prabhakar Reddy
Publication year - 2014
Publication title -
international journal of applied mechanics and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.189
H-Index - 8
eISSN - 2353-9003
pISSN - 1734-4492
DOI - 10.2478/ijame-2014-0020
Subject(s) - nusselt number , grashof number , mechanics , porous medium , natural convection , materials science , sherwood number , heat transfer , magnetohydrodynamics , darcy number , thermodynamics , porosity , physics , rayleigh number , magnetic field , reynolds number , composite material , turbulence , quantum mechanics
The thermal diffusion and viscous dissipation effects on an unsteady MHD free convection heat and mass transfer flow of an incompressible, electrically conducting, fluid past an infinite vertical porous plate embedded in a porous medium of time dependent permeability under oscillatory suction velocity in the presence of a heat absorbing sink have been studied. It is considered that the influence of a uniform magnetic field acts normal to the flow and the permeability of the porous medium fluctuates with time. The dimensionless governing equations for this investigation have been solved numerically by using the efficient Galerkin finite element method. The numerical results obtained have been presented through graphs and tables for the thermal Grashof number (Gr > 0) corresponding to the cooling of the porous plate and (Gr < 0) corresponding to heating of the porous plate to observe the effects of various material parameters encountered in the problem under investigation. Numerical data for skin-friction, Nusselt and Sherwood numbers are tabulated and then discussed.