THERMOPHORESIS AND BROWNIAN MOTION EFFECTS ON MHD MICROPOLAR NANOFLUID FLOW PAST A STRETCHING SURFACE WITH NON-UNIFORM HEAT SOURCE/SINK
K. Anantha Kumar, V. Sugunamma, N. Sandeep
Abstract
This report presents the combined influence of heat and mass transfer on magnetohydrodynamic stagnation point flow of micropolar nanoliquid over a stretching surface. The fluid flow is assumed to be steady and laminar. The impacts of thermal radiation, first order velocity slip, non-uniform heat source/sink, and chemical reaction are considered. The nanofluid model is considered in this work in view of the response of Brownian motion and thermophoresis. Appropriate similarity transformations are used to transform the governing partial differential equations to dimensionless ordinary differential equations (ODEs), which are highly nonlinear and coupled. A fourth order Runge-Kutta-based shooting method is utilized to solve the nonlinear coupled ODEs. Impacts of various physical parameters on the fields of velocity, micro-rotation, and temperature are denoted through graphs. Computations for friction factor, couple stress, local Nusselt number, and Sherwood number are carried out. Results indicate that an increase in the magnitude of Brownian motion and thermophoresis parameters amplifies the thermal field, whereas the fluid concentration becomes reduced with a boost in Brownian motion parameter.