Chemical Reaction on Unsteady MHD Flow over a Vertical Stretching Plate Embedded in Porous Medium with Richardson Number

Abstract

The chemical reaction of heat and mass transfer in an unsteady magnetohydrodynamics (MHD) mixed convection stagnation point flow towards a vertical stretching plate embedded in porous medium was studied. Richardson number and concentration were taken into consideration in this study. By selecting suitable similarity variables, the non-linear partial differential equations (PDEs) are transformed into a set of ordinary differential equations (ODEs), and then solved numerically using the boundary value problem solver (bvp4c) in MATLAB software. The solution is dependent on the governing parameters including Prandtl number, reaction rate parameter, Schmidt number, thermal Richardson number and buoyancy ratio parameter. The numerical results are depicted graphically in velocity, temperature and concentration profiles. The findings have shown that as the chemical reaction parameter increases, the temperature profile and Sherwood number also increases.