• Effect of Couple stress fluid with variable viscosity and an Endoscope on Peristaltic Motion

Abstract

The Problem of peristaltic transport of a couple stress fluid with variable viscosity through the gap between coaxial tubes where the outer tube is non-uniform with sinusoidal wave traveling down its wall and the inner tube is rigid. The relation between the pressure gradient, friction force on the inner and outer tube are obtained in terms of couple stress parameter and viscosity. The numerical solution of pressure gradient, outer and inner friction force and flow rate are shown graphically.