Effect of chemical reaction on heat and mass transfer by mixed convection flow about a sphere in a saturated porous media

Purpose - The purpose of this paper is to study the effects of chemical reaction on mixed convection flow along a sphere in non-Darcian porous media. Design/methodology/approach - The sphere surface is maintained at uniform temperature and species concentration for both cases of heated (assisting flow) and cooled (opposing flow) sphere. An appropriate transformation is employed and the transformed equations are solved numerically using an efficient implicit iterative tri-diagonal finite difference method. Findings - It is found that chemical reactions have significant effect on heat and mass transfer. Comparisons with previously published work are performed and the results are found to be in excellent agreement. Originality/value - The paper is original and describes how a parametric study of the physical parameters was conducted and illustrates graphically a representative set of numerical results for the velocity, temperature, and concentration profiles, as well as the local skin-friction coefficient, local wall temperature, and local wall concentration, to show interesting features of the solutions.