Abstract
In this paper, diffusive effects on hydrodynamic Casson nanofluid boundary layer flow over a stretching surface is studied. A nonuniform magnetic field of strength is imposed in transverse direction. The arising nonlinear problem is governed by Casson fluid, Nanofluid and magnetic field parameter. The governing boundary layer equations are reduced into ordinary differential equations by using suitable similarity transformations. The transformed equations are solved numerically by using an implicit finite difference scheme known as the Keller-box method. A comparison of the obtained results is performed with the published results. It is found that velocity profiles are suppressed by increasing values of magmatic and Casson fluid parameter.