Abstract
The effects of variable temperature dependent viscosity on peristaltic flow of Newtonian fluid in an annulus has been investigated with long wave length approximations. A regular perturbation method has been used to obtain explicit form for the velocity, temperature and relation between flow rate and pressure gradient. The expression for the pressure rise, friction force, velocity and temperature were plotted for different values of variable viscosity parameter beta, radius ratio, amplitude ratio phi, heat absorption parameter beta(1), and force convection parameter G(r). It is found that the pressure rise decrease as the viscosity parameter beta increases and increases as the radius ratio as epsilon increases and b decreases. (C) 2010 Elsevier Inc. All rights reserved.