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Peristaltic transport of a couple stress fluid permeated with suspended particles

A B S T R A C T The peristaltic motion of a couple stress fluid permeated with suspended particles through a two dimensional flexible channel under long wave length approximation is studied. A perturbation method of solution is obtained in terms of wall slope parameter and closed form of expressions has been derived for axial velocity and transverse velocity in fluid phase and particle phase. The expression for pressure rise and friction force has been computed numerically using mathematics software mathematica. The graphical results have been presented to discuss the physical behavior of various physical parameters on pressure rise and friction force. It is observe that pressure rise decreases with increase in couple stress parameter and Dust concentration parameter. The friction force has an opposite behavior compared with pressure rise.