The flow of a particle-fluid suspension in a non-uniform tube induced by
sinusoidal peristaltic wave motion of the wall has been investigated. The equations
governing the flow for both the fluid and particle phases have been solved and the
expressions for the flow rate, pressure rise and friction force has been derived. It is
shown that pressure rise increases with the particle concentration but decreases with
increasing flow rate. In addition, the pressure rise increases indefinitely with
amplitude ratio for any given set of other parameters. Pressure rise assumes
considerably smaller magnitude in a non-uniform tube as compared to its
corresponding magnitude in uniform diameter tube. Friction force possesses the
characteristics opposite to the pressure rise for any given set of parameters.