AN AQUEOUS MODELING STUDY ON MOTIONS OF BUBBLES INJECTED INTO SQUARE CROSS-SECTION MOLD

摘要

Presented in this paper is an experimental study on a complex flow system occuring in a square cross-section mold, into which a water jet mixed with gas bubbles is injected. Flow visualization technique is used to reveal both flow patterns and the motion features of injected bubbles. External controlling parameters, which are of great concern to engineering applications such as gas supply pressure, gas flow rate, orifice diameter, ... applicable for production operation were experimental-ly determined. Size, size distribution of bubbles, their rising velocities were measured and the effect of bubbles motion on inclusion removal was also explored.