Effects of Variable Viscosity and Thermal Conductivity on Combined Free-Forced Convection Heat and Mass Transfer MHD Flow of Micropolar Fluid past a Vertical Porous Plate in a Porous Medium

Abstract

The effect of temperature dependent viscosity and thermal conductivity on combined free-forced convection heat and mass transfer MHD flow of micropolar fluid past a vertical porous plate in a porous medium is studied where the viscosity and thermal conductivity are assumed to be inverse linear functions of temperature. The partial differential equations governing the flow with heat and mass transfer of the problem are transformed into dimensionless form of ordinary differential equations by using similarity substitutions. The governing boundary value problems are then solved numerically using shooting method. The effects of various parameters viz. viscosity parameter, thermal conductivity parameter, thermal buoyancy parameter, mass buoyancy parameter, coupling constant parameter, Prandtl number and magnetic parameter on velocity, micro-rotation, temperature and species concentration fields are investigated and presented graphically. The coefficient of skin-friction, Nusselt number and Sherwood number are also computed and presented tabular form.