Generation and Evolution of Cavitation Bubbles in Volume Alternate Cavitation (VAC)

Abstract Cavitation generation methods have been used in multifarious directions because of their diversity, and numerous studies discussions conducted on cavitation methods. This study aims to explore the generating mechanism evolution law volume alternate (VAC). In VAC, liquid water is placed an airtight container with a variable volume. As alternately changes, inside continues cavitate. Then, mixture turbulence model in-cylinder dynamic grid are adopted conduct computational fluid dynamics simulation cavitation. simulation, cloud images at seven heights central axis monitored, phenomenon height eccentricity analyzed detail. By employing flow visualization method, revealed. The synergistic effects experiments high-speed camera capturing confirm correctness results. experiment, change stroke set 20 mm, frequency 18 Hz, shooting 10000 FPS. experimental results indicate that position has reasonable during whole cycle cloud. Also, alternation corresponds generation, development, collapse stages bubbles.