Cavitation Bubble Dynamics inside Liquid Drops in Microgravity

Details Cavitation Bubble Dynamics inside Liquid Drops in Microgravity Cavitation Bubble Dynamics inside Liquid Drops in Microgravity

2006-10-21

arxiv.org/abs/physics/0610166v1

PRL 97, 094502 (2006)

Physics

Fluid Dynamics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.97.094502

We studied spark-generated cavitation bubbles inside water drops produced in microgravity. High-speed visualizations disclosed unique effects of the spherical and nearly isolated liquid volume. In particular, (1) toroidally collapsing bubbles generate two liquid jets escaping from the drop, and the "splash jet" discloses a remarkable broadening. (2) Shockwaves induce a strong form of secondary cavitation due to the particular shockwave confinement. This feature offers a novel way to estimate integral shockwave energies in isolated volumes. (3) Bubble lifetimes in drops are shorter than in extended volumes in remarkable agreement with herein derived corrective terms for the Rayleigh-Plesset equation.

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