Irreversibility analysis of thermo‐solutal Marangoni convection in Maxwell power‐law‐fluid flow

Abstract

This article theoretically investigates the entropy generation in unsteady two‐dimensional magnetohydrodynamic flow of Maxwell power‐law‐fluid past a stretching surface in consideration of thermal and solutal Marangoni convection. The heat and mass transport phenomenon of Maxwell power‐law‐fluid has been expressed using Cattaneo–Christov double diffusion (CCDD) model. Governing equations are modeled by using Navier–Stokes equations under suitable consideration. The developed mathematical model of the problem is in the form of nonlinear and coupled partial differential equations. Using similarity transforms, governing equations are converted into non‐linear coupled ordinary differential equations (ODEs) whose numerical solutions have been obtained using Bvp4c routine in MATLAB. Through numerous graphs, a thorough analysis of entropy generation and Bejan number is conducted. It has been observed that the fluid velocity gets accelerated for higher values of thermal and solutal Marangoni parameters in the boundary layer.