MHD non-orthogonal stagnation point flow of a nanofluid towards a stretching surface in the presence of thermal radiation

Abstract

This article investigates the theoretical study of steady stagnation point flow with heat transfer of a nanofluid towards a stretching surface. It is assumed that the fluid impinges on the wall obliquely. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The basic partial differential equations are reduced to ordinary differential equations which are solved numerically using the fourth-order Runge–Kutta method. Numerical results are obtained for distributions of velocity, temperature and concentration, as well as, for the local Nusselt number and local Sherwood number for several values of governing parameters. The results indicate that the local Nusselt number decreases with an increase in both Brownian motion parameter Nb and thermophoresis parameter Nt. However, the local Sherwood number increases with an increase in both thermophoresis parameter Nb and radiation effect R, but it decreases as the values of Nt increase. Keywords: Nanofluid, MHD stagnation flow, Stretching sheet, Thermal radiation effects, Heat and mass transfer