Abstract
In the present study we have analyzed the steady stagnation point flow of a non-Newtonian fluid (Casson model) towards a stretching surface with heat transfer and Nano particles. It is assumed that the fluid impinges on the wall obliquely. The model used for the Nano fluid incorporates the effects of Brownian motion and thermophoresis. The governing equations of the model under consideration are presented. The governing nonlinear partial differential equations are converted into nonlinear ordinary differential equations by using similar and non-similar variables. The resulting ordinary differential equations are successfully solved analytically with the help of a newly developed scheme known as Homotopy analysis method (HAM). Graphically results are shown for non-dimensional velocities, temperature and Nano particle concentration. Numerical values of skin friction coefficients, diffusion mass flux and heat flux are computed. It is found that boundary layer is formed when the stretching velocity of the surface is less than the in viscid free-stream velocity and velocity at a point decreases with the increase in non-Newtonian (Casson) parameter of the fluid.