RADIATION EFFECTS ON UNSTEADY FREE CONVECTION HEAT AND MASS TRANSFER IN A WALTERS-B VISCOELASTIC FLOW PAST AN IMPULSIVELY STARTED VERTICAL PLATE WITH UNIFORM HEAT AND MASS FLUX.

Abstract

A numerical solution of the unsteady radiative, free convection flow of an incompressible 
viscoelastic fluid past an impulsively started vertical plate with uniform heat and mass flux is presented here. 
The Walters-B liquid model is employed to simulate medical cream manufacturing, chemical engineering, and 
medical bio-technological applications. The Rosseland approximation is used to describe the radiative heat 
transfer in the limit of the optically thin fluid. The governing non-linear coupled equations are solved using an 
implicit finite difference scheme. Numerical results are shown graphically. It is also observed that, when the 
radiation parameter (F) increases, the velocity and temperature decreases in the boundary layer. The local 
skin-friction increases with the increase viscoelasticity parameter.