Oscillatory motion of a viscoelastic fluid over a stretching sheet in porous media

Abstract

The effects of an oscillatory motion of a viscoelastic fluid over infinite stretching sheet in porous media have been studied. The surface absorbs the fluid with a porous medium, and the velocity oscillates depending on the stretching rate (b) and the vertical distance (z). Analytical expressions for the velocity and coefficient of skin friction have been studied, first by the perturbation technique and then by Taylor series method. The effect of viscoelastic parameter (K1), permeability parameter (K2), and the vertical distance (z) on the velocity and on the flow characteristics are discussed. The velocity of the viscoelastic fluid is found to decrease in the presence of porous media, as compared to the viscous fluid. Copyright © 2000 by Begell House, Inc.