Bubble Volume Formed at Submerged Nozzles

Constant gas flow condition

Abstract

Much work has been done on the bubble volume formed at submerged single nozzles. Some of these studies concerned theoretical analysis under constant gas flow condition, that is, infinitesimal chamber volume. These results, however, agree with the experimental results only in a limited range of gas flow rate.
In the present work, it was observed experimentally that the constant gas flow condition was attained either by making the chamber number given by Tadaki et al. less than unity or the nozzle length long enough to be compared with the nozzle diameter. Furthermore, when the two-stage model presented by Ramakrishnan et al., was modified in the groups of surface tension and drag force, it was found that the theoretical results agree well with experimental values.