The Breakup Characteristics of Bubbles in Venturi Tubes Under Different Levels of Dissolved Gas

Venturi tube is a microbubbles generator with simple and robust design. Air was injected into the liquid flow, transported through throat of break up as in diverging area. In high-speed liquid, cavitation occurred along air to tube. One factors that affected existence dissolved gas level liquid. Therefore, this study aims compare microbubble collapse phenomena under different further understand effect formation. experiment, two oxygen (DO) were used represent The result showed although breakup mechanism generally same for both DO level, higher at high speed had more wrinkles on its bubbles surfaces during process. Pressure measurement results demonstrated 8.5 mg/L slightly inlet pressure than 6.5 flow condition. Calculation bulk number loss coefficient suggested occurrence ratio. Higher have number. On other hand, distribution condition produced lower specifically low medium SMD resulted smaller diameter ratio while value almost At speed, all cases.