Unsteady stagnation point flow of viscous fluid caused by an impulsively rotating disk

This paper describes the influence of mass transfer with first order chemical reaction and concentration buoyancy effect on the unsteady magnetohydrodynamic (MHD) stagnation point flow of a viscous fluid. The governing partial differential equations are reduced into the ordinary differential equations by using similarity transformations. Homotopy analysis method (HAM) is employed for the computations of solution. The effects of some interesting parameters on the dimensionless radial and axial velocities and dimensionless concentration field are examined. The variations of skin friction coefficients and Sherwood number are analyzed through plots.