High-frequency capillary waves excited by oscillating microbubbles
Angelo Pommella, Jeanne Lantz, Vincent Poulichet, Valeria Garbin
TL;DR
This study demonstrates how oscillating microbubbles driven by ultrasound can excite high-frequency capillary waves, revealing wave patterns from single and multiple bubbles near a free surface.
Contribution
It introduces a novel visualization of capillary waves excited by microbubbles oscillating at controlled ultrasound frequencies.
Findings
Capillary wave frequency matches bubble oscillation frequency
Interference patterns observed from multiple bubbles
Wave excitation controllable via ultrasound parameters
Abstract
This fluid dynamics video shows high-frequency capillary waves excited by the volumetric oscillations of microbubbles near a free surface. The frequency of the capillary waves is controlled by the oscillation frequency of the microbubbles, which are driven by an ultrasound field. Radial capillary waves produced by single bubbles and interference patterns generated by the superposition of capillary waves from multiple bubbles are shown.
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Taxonomy
TopicsUltrasound and Cavitation Phenomena · Combustion and Detonation Processes · Fluid Dynamics and Mixing