Entropy generation analysis in an unsteady hydromagnetic micropolar fluid flow along an exponentially stretchable sheet with slip properties

Abstract

ABSTRACT This present study communicates entropy generation analysis in an unsteady flow of a reactive hydromagnetic micropolar fluid passing an exponentially stretchable sheet with multiple slip properties. The developed model scrutinizes the impacts of varying viscosity alongside with non-uniform heat source coupled with nonlinear thermal radiation. The formulated nonlinear equations describing the problem are carefully transformed into ordinary differential equations via similar transformations approach, while the solutions to the modified equations are sought using the Galerkin weighted residual method. A strong relationship exists between the results obtained in this study with the related published ones in literature in some limiting conditions. The current investigation reveals that the dimensionless velocity, temperature and concentration profiles depreciate with the unsteadiness parameter, whereas the micropolar material term accelerates the velocity profiles. Besides, the analysis shows that the hydrodynamic slip parameter improves heat and mass transfer irreversibilities while growth in the material micropolar term, Eckert and Prandtl numbers cause a rise in the entropy generation in the system.