Soret and Dufour effects on mhd flow of casson fluid on a stretching vertical surface in the presence of nonlinearized thermal radiation and Nth order chemical reaction

This paper investigates the heat and mass transfer characteristics of a mixed convection MHD boundary layer flow on a linearly stretching vertical surface. An incompressible Casson fluid occupying the porous space takes into account Dufour and Soret effects in the presence of nonlinearized thermal radiation, viscous dissipation, Joule heating and chemical reaction of order . The governing partial differential equations are transformed into a set of coupled ordinary differential equations, by invoking similarity transformations. The involved nonlinear differential system is solved numerically using the Runge-Kutta-Fehlberg scheme with shooting method to determine the solutions to the velocity, temperature and species concentration profiles. Numerical values of the skin friction coefficient, Nusselt number and Sherwood numbers are also tabulated for physical interpretations of the pertinent parameters. It was established that for some kind of mixtures of light and medium molecular weight, the Soret and Dufour’s effects should be taken into cognizance and increase in order of chemical reaction is confirmed to enhance Casson fluid velocity, temperature as well as concentration.