Abstract
This article presents an electrically conducting Casson fluid flow with homogeneous-heterogeneous reactions past an exponentially stretching/shrinking surface. The aim of this analysis is to examine the Casson fluid for both stretching and shrinking case of the sheet. The transmuted system of equations has been solved by employing homotopy analysis method (HAM). Furthermore to authenticate the correctness of the applied method, HAM is compared with numerical technique and found an excellent agreement. The variation in velocities, temperature, concentration, skin frictions, and local Nusselt number for both stretching and shrinking cases are shown through figures. The results have shown that the skin friction along primary direction has declined for both stretching and shrinking cases. On the other hand, the skin friction along secondary direction has declined for the stretching case, while augmented for the shrinking case. The heat transfer rate has direction relation with the Casson parameter for the stretching case, while there is an inverse relation for the shrinking case. The stretching ratio parameter has reduced the velocity along x-direction and thermal profiles, while reduced the velocity along y-direction and concentration profiles.