EFFECTS OF THERMAL RADIATION AND VISCOUS DISSIPATION ON POWELLEYRING NANOFLUID WITH VARIABLE THICKNESS

摘要

A steady boundary layer flow of Powell-Eyring nanofluid past a stretching sheet with variable thickness in the presence of thermal radiation and viscous dissipation is studied numerically. The model is used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The suitable transformations are applied to convert the governing partial differential equations into a set of nonlinear coupled ordinary differential equations. Runge-Kutta-based shooting technique is employed to yield the numerical solutions for the model. The obtained results for the velocity, temperature and concentration are analyzed graphically for several physical parameters. It is found that an increment in wall thickness parameter results in decrease of velocity, temperature and concentration profiles. Further, in tabular form the numerical values are given for the local skin friction coefficient, local Nusselt number and Sherwood number. A remarkable agreement is noticed by comparing the present results with the results reported in the literature as a special case.