Entropy analysis in MHD convective flow of Carreau fluid over a curved stretching surface with soret and dufour effects

Abstract

The purpose of this study is to provide a mathematical model of the process of entropy formation that occurs during the MHD convective transport of Carreau fluid across a curved stretched surface with soret and dufour effects. The energy equation is explored with the combined characteristics of joule heating, viscous dissipation and heat absorption/generation. The modeled governing equations are converted into nonlinear ordinary differential equations using similarity variables, and the results are acquired through the utilization of the built-in command NDSolve. It is revealed that entropy generation and Bejan number increase for higher values of Brinkman number. The impact of the Hartman number increase the entropy generation and reduced the Bejan behavior. The curvature parameter reduced the flow and temperature of fluid but increased the concentration profile. A small change in the heat absorption parameter strengthens the temperature profile. Graphical representations are used to discuss the behavior of Bejan number, entropy generation, velocity, temperature, and concentration profiles for the different values of physical parameters. The results of computations of drag force, the local nusselt number, and the Sherwood number are shown in tabular form for numerous values of the parameters.

Keywords:

• Curved stretching surface
• Joule heating
• Soret and Dufour effects: heat absorption/generation