Wall effects on the terminal velocity of a single non-spherical particle moving through a non-newtonian fluid

Abstract

The wall efects on the terminal falling velocity of short rigid cylinders and square prisms moving through non-Newtonian polymer solutions of different degree of pseudoplasticity and elasticity have been examined experimentally in the creeping flow region. In the experiments, terminal falling velociteis of particles were measured in Perspex cylindrical test comumns of various diameters. The wall effect results have been evaluated and the relationship based on the power law and Carriau viscosity models have been proposed for prediction of the wall effect correction factor for non-spherical particles and cylindrical confining walls.