Three-dimensional oscillation of an acoustic microbubble between two rigid curved plates

This study investigates three-dimensional microbubble oscillation between two curved rigid plates under a planar acoustic wave using the boundary integral method (BIM).

The research validates the model against nonlinear spherical oscillation cases and examines how wave direction and horizontal standoff distance (h) affect bubble dynamics. Key findings include: wave direction significantly influences jet direction and high-pressure regions but has minimal impact on jet velocity, maximum radius, and total energy; acoustic bubbles generate drastically higher jet velocities and pressure regions than gas bubbles; increasing h from 2 to 4 increases maximum bubble radius and jet velocity while decreasing Kelvin impulse and centroid movement; curved plates produce greater high-pressure regions and shorter bubble lifetimes than flat plates, with different jet directions and velocity vectors. This research has applications in ultrasonic biomedical devices and surface cleaning technologies.