Exploration of the Pulsation Characteristics of a Bubble Adjacent to the Structure with Multiple Air Bubble Adhesions

Abstract

The dynamics of bubbles have garnered extensive interest among researchers both domestically and internationally due to their applications in engineering and military fields. The exploration of the mechanisms behind bubble loading, cavitation damage, and impact destruction has always been a focal point of study. However, in practical applications, bubbles often do not occur in isolation, and the interactions between multiple bubbles are highly complex. Therefore, this study investigates the pulsation characteristics of bubbles near rigid boundaries with multiple air bubbles attached in different spatial arrangements, focusing on the coupled pulsation phenomenon between cavitation clusters and bubbles. The research indicates that this coupled pulsation phenomenon is primarily influenced by the dimensionless distance parameter γs from the bubble to the boundary, the spacing γL between the air bubbles, and the spatial arrangement. Compared to Layout II, the bubble exhibits off-axis migration and jet direction only under Layout I conditions; for spatial Layout I, when the air bubble spacing γL is fixed, the displacement of the air bubble directly above the bubble is proportional to the distance parameter γs. This research underscores the potential for mitigating cavitation-induced damage through the strategic adhesion of multiple air bubbles.

Keywords

• multibubble coupling
• bubble dynamics
• bubble experiment
• air bubble