The Problem of peristaltic transport of a magnetic fluid with variable viscosity through the gap between coaxial tubes where the outer tube is nonuniform with sinusoidal wave traveling down its wall and the inner tube is rigid. The relation between the pressure gradient and friction force on the inner and outer tubes is obtained in terms of magnetic and viscosity parameter. The numerical solutions of pressure gradient, outer friction and inner friction force, and flow rate are shown graphically.
V. P. Rathod. S. K. Asha. "Effects of Magnetic Field and an Endoscope on Peristaltic Motion." J. Appl. Math. 2011 1 - 14, 2011. https://doi.org/10.1155/2011/148561