Magnetohydrodynamic Flow and Heat Transfer Characteristics in Micropolar-Casson Fluid over a Stretching Surface with Temperature-dependent Material Properties.

Abstract

The current investigation communicates the flow and heat transfer characteristics of an electrically conducting micropolar-Casson fluid over a two-dimensional stretching surface with variable thermal conductivity and viscosity. Thermal radiation, viscous dissipation and heat source effects are also accounted for in the energy equation. The formulated equations of flow and heat transfer are converted from partial to ordinary differential equations using suitable similarity transformations while the dimensionless equations are solved by Runge-Kutta Fehlberg integration scheme. The effects of the physical parameters are publicized through graphs and validated by related published studies in the limiting situations. It is found from the investigation that there is accelerated flow due to the material micropolar term whereas the presence of Casson fluid and magnetic field terms decelerate the velocity. Besides, the surface temperature improves with a rise in the Casson fluid term, Eckert number and thermal conductivity parameter whereas the trend is reversed for micropolarity influence. Keywords: Micropolar-Casson fluid; Magnetohydrodynamic, Variable viscosity; Variable thermal conductivity;Viscous dissipation