Variable Viscosity on Convective Heat Transfer in a Dusty Fluid over a Vertical Permeable Surface with Thermal Radiation

The effects variable viscosity on a steady free convective boundary layer flow of a dusty fluid past a vertical permeable stretching surface is studied. The system of non linear partial differential equations governing the equations motion are reduced to a system of ordinary differential equations using similarity transformations. The resultant boundary value problems are then solved numerically using shooting technique based on fourth order Runge-Kutta method. The effects of physical parameters viz., viscosity parameter, fluid-particle interaction parameter, local Grashof number, suction parameter, Prandtl number, radiation parameter and Eckert number on the flow and heat transfer are computed and presented graphically. The skin friction coefficient and the temperature gradient which gives the rate of heat transfer at the surface are also obtained and present in Tables. The effects of all the parameters are quite significant.