Effects of Slip and Radiation on Convective MHD Casson Nanofluid Flow over a Stretching Sheet Influenced by Variable Viscosity

Abstract: The aim of the present investigation is framing the effect of thermalradiation and slip on a magnetohydrodynamic (MHD) Casson nanofluid flowover a stretching surface under the influence of variable viscosity andconvective boundary condition. First, non-dimensionally developedboundary layer equations are deduced with suitable transformations. Thenthey are solved numerically by the Runge–Kutta–Fehlberg method with theshooting technique for different values of parameters. The most relevantresult of the present study is the fact that the augmented magneticfield strength, Casson fluid parameter, and the inclined angle underminethe flow velocity, establishing thinner hydrodynamics boundary layer,while the thermal slip and radiation parameters show the opposite trend.Another most important outcome is the fact that increase in the Prandtlnumber, radiation, viscosity, thermal slip, and radiation upsurges thefluid temperature, leading to improvement in the thermal boundary layer.The effects of different natural parameters on the skin frictioncoefficient and the Nusselt and Sherwood numbers are examinedgraphically. For a limiting case of the present model, the obtainedsolution was found to be in excellent agreement with the existingliterature.