Entropy Analysis of Mixed Convective Magnetohydrodynamic Flow of a Viscoelastic Fluid over a Stretching Sheet

In the present article, an investigation is made on entropy generated within a mixed convective magnetohydrodynamic flow of a viscoelastic fluid over a stretching sheet. In performing the analysis, it is assumed that the flow is steady, laminar, and fully developed. The governing equations for velocity and temperature fields are transformed into nonlinear ordinary differential equations by using suitable similarity transformations and are solved using the homotopy analysis method. The expressions for local entropy generation number Ns, average entropy [Ns]_avg, Bejan number Be, and average Bejan number [Be]_avg are obtained using the corresponding velocity and temperature data. A comprehensive parametric study is presented through graphs.