Authors: Masamichi Sano, Kazumi Mori
Abstract: A study on the size of bubbles dispersed in memory has been made using the electroresistivity probe technique. Nitrogen was injected through a nozzle into the bath at gas-flow rates of 50~1330 (cm3/sec, 1 atm). Measurements were made on the size of bubbles formed at the nozzle and rising in the bath. The size of bubbles formed at a nozzle in the present gas-flow range could be described by the empirical equation applied previously to estimate the size of bubbles in a lower gas-flow range. The volume-surface mean diameter of the bubble swarms in mercury increased with increasing superficial gas velocity. An equation is obtained to describe the effects of liquid physical properties on the average size of bubbles in the swarms. The equation is used to estimate the average size of bubbles rising in molten iron.