An experimental study on the influence of fluid flow pattern on microbubble generation

摘要

Geometrical properties of generated microbubbles induced by different fluid flow patterns were investigated experimentally. Image processing method has been used to find microbubble size distribution and to determine bubbles’ roundness as well. Three types of flow patterns were produced by changing microbubble generator configuration in order to improve bubbles’ size distribution. These different geometrical configurations of designed microbubble generator were used to generate microbubbles in various air volume fractions. Obtained results confirm direct relation between generated microbubbles size and their distribution with fluid flow patterns. More complex geometry creating high turbulent regions are suggested to increase bubble breaking up especially for high values of void fractions.