3-Dimensional Analysis of Flow Pattern in a Bath with PIV Measurement under Offset Agitation

Abstract

Water flow in a cylindrical bath under mechanical offset agitation is investigated by PIV measurement from two directions. Velocity vectors in the vertical and horizontal cross-sections are presented. An inclined-vortex forms under certain conditions in this agitation method. A fast flow toward impeller blades is observed above the impeller. A radial flow is observed below the impeller. Low-density particles widely disperse into the bath through the effects of these two kinds of flows.