Radiation effects on heat and mass transfer in MHD stagnation-point flow over a permeable flat plate with thermal convective surface boundary condition, temperature dependent viscosity and thermal conductivity

We study a steady laminar 2-D MHD viscous incompressible flow over a permeable flat plate with thermal convective boundary condition and radiation effects. The viscosity and thermal conductivity of fluid are assumed to vary linearly with temperature. Similarity representation of the governing partial differential equations is obtained via group method. Similarity equations are then solved numerically by implicit finite difference technique. Effects of convective heat transfer parameter (b), radiation parameter (R,) magnetic field parameter (M), the thermal conductivity parameter (S), suction parameter (fw), Prandtl number (Pr) and Schmidt number (Sc) on the dimensionless axial velocity, temperature, concentration, wall temperature, the rate of heat transfer and the rate of mass transfer are investigated. Good agreement is found between the numerical results of the present paper with published result for special case.

► We study radiation effects and the effect of the thermal convective boundary condition, variable viscosity and thermal conductivity on coupled heat and mass transfer by MHD mixed convective flow.
► The governing boundary layer equations are formulated and transformed into a set of similarity equations by Lie group analysis.
► The resulting equations are then solved numerically using Maple 13 which uses a fourth-fifth order Runge-Kutta-Fehlberg algorithm for solving nonlinear boundary value problems.
► Effects of pertinent parameters on the skin friction factor, the rate of heat and the rate of mass transfer are obtained and displayed graphically and in tabular form.
► Good agreement is found between the numerical results of the present paper with the earlier published works under some special cases.