0110 Study on the bubble behavior in the high viscous fluids

Abstract

Behavior of bubbles is important in process for production of materials. In process for production of materials, bubbles are mixed in the materials spontaneously. To remove bubbles from high viscous fluid, clarify of behavior of bubbles is needed. In the previous study, behavior of bubbles is observed. However relation between bubbles and surrounding fluids, and pressure are not studied. In this study, to understand behavior of bubbles, we observe shape and velocity of injected bubbles. As a result, the rising velocity of bubble upward flow depends on bubble diameter. Shape of bubble is spherical in high viscous fluids. When two bubbles coalesce, the lower bubble catches up with the upper one. After catching up, bottom of upper bubbles is deforms. After deforming, the lower bubble is absorbed. It can be reproduced to some extent the actual phenomena make the numerical calculations for rise of bubbles was confirmed. It is also confirmed that the numerical simulation can reasonably reproduce bubble rising velocity in high viscous fluid.