Analysis of Entropy Generation of Casson Fluid Flow Over a Stretching Surface with Second-Order Velocity Slip in Presence of Radiation and Chemical Reaction

Abstract

A two dimensional time independent casson fluid flow over a exponentially permeable stretching surface with viscous dissipation, radiation and chemical reaction has been analysed. An invariable magnetic field B0 is acted upon the fluid flow in the transverse direction. With the help of some suitable similarity transformation, the governing partial differential equations are transformed into a set of non-linear ordinary differential equations. These equations are further solved numerically using MATLAB routine bvp4c technique. The important outcomes of this problem are discussed with the help of graphs and tables for various values of flow parameters. A special importance is given in the effect of flow parameters on the entropy generation rate. It is perceived that the porosity parameter enhances the heat transfer rate and mass accumulation rate at the surface and control the drag force of the fluid. One of the most important advantages of this fluid model is that it reduces the irreversibility present during the fluid streaming above an extending surface. A comparison of the entropy generation of casson fluid with that of Newtonian fluid is also given.