Re-Occurrence Time of Swirl Motion Caused by Transient Increase in Water Bath Depth

Abstract

The swirl motion of a bubbling jet generated in a bottom blown bath ceases temporarily under a certain gas injection condition due to a sudden increase in the bath depth. Re-occurrence time of the swirl motion, T_s,sa, is defined as the period from the sudden supply of water into the bath to the moment at which re-occurrence of the swirl motion is observed in the bath. Measurements of T_s,sa, are carried out to propose its estimation method.