Vortex Cavity Shape and the Associated Path-Line of Discharged Bubbles in an Aerated Vessel Agitated by a Rushton Turbine

Abstract

The vortex cavity behaviour and the path-line of bubbles just dispersed from the cavity at very low gassing rates have been determined by a photographic method. The cavity shows a strong instability. The cavity size increases with increase in gassing rates, with decrease in molecular weight and by the saturation of CO₂ in water, but is independent of impeller speed. The position of path-lines of bubbles is almost the same as that of the vortex axis for a single-phase flow in spite of the different experimental conditions.