Mixed Convective Flow of a Powell-Eyring Fluid over a Non-linear Stretching Surface with Thermal Diffusion and Diffusion Thermo

The effect of thermal diffusion (Soret) and diffusion thermo (Dufour) on the heat and mass transfer characteristic in the mixed convective boundary layer flow of Powell-Erying fluid over a nonlinear stretching surface is investigated. Homotopy Analysis Method is applied to obtain an approximate analytic solution for the velocity, temperature and concentration distribution. The effects of non-Newtonian fluid parameters E and δ on the flow, heat and mass transfer are investigated and discussed. It has been found that due to nonlinear stretching of surface and the presence of buoyancy, the Soret number and Dufour number enhance the concentration and temperature in the boundary layer respectively.