Soret and Dufour effects on flow of Casson fluid over a stretching sheet with chemical reaction

Casson fluid model is extensively used for modeling of blood flow in thin arteries at low shear rates. The article explores the effects Dufour and Soret on free convective flow of Casson fluid over a non-linearly stretching sheet embedded in a porous matrix. Further, the thermal and solutal buoyancies in the momentum equation, the exponential space-based heat source/sink (ESHS) and thermal radiation are also incorporated in the heat transfer equation. Similarity solutions are obtained by using appropriate transformations and the transformed equations are solved by the help of MATLAB bvp4c code. The impacts of operating parameters on velocity, temperature and concentration distributions are explained through graphs and tables. It is concluded that Dufour and Soret effects serve as the surface coolant and also for the maintenance of solutal deposition-free surface. Applied magnetic field and heavier diffusing species with suction lead to thinner boundary layer preventing vorticity diffusion.