Abstract
The present investigation deals with the effects of thermal dispersion, radiation and MHD on free convection boundary layer over a vertical cone in a Non-Newtonian fluid saturated porous medium with variable wall temperature and an exponentially decaying internal heat generation. The coefficient of thermal diffusivity has been assumed to be the sum of molecular and dispersion thermal diffusivity due to mechanical dispersion. Rosseland approximation is used to describe the radiative heat flux in the energy equation. The resulting similarity equations are solved numerically for two cases, one with internal heat generation (IHG) and the other without internal heat generation (WIHG). Numerical results for the dimensionless heat transfer rate in terms of the local Nusselt number are presented in tabular form and in graphical form to illustrate the influence of the various parameters on the temperature profiles with and without heat generation.