Cavitation inception from transverse waves in a thin liquid gap
| Autor: | Julien Rapet, Claus-Dieter Ohl, Pedro A. Quinto-Su |
|---|---|
| Přispěvatelé: | School of Physical and Mathematical Sciences |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Shock wave
Cavitation Materials science Tension (physics) Nucleation General Physics and Astronomy Transverse wave 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology 01 natural sciences Elastic Deformation Physics::Fluid Dynamics symbols.namesake Physics [Science] 0103 physical sciences Solid mechanics symbols Rayleigh wave 010306 general physics 0210 nano-technology Longitudinal wave |
| Popis: | It is well known that dielectric breakdown in a liquid generates cavitation bubbles and shock waves. Here we demonstrate that when the liquid is bounded by two solid glass boundaries (10--20-$\ensuremath{\mu}\mathrm{m}$ separation), rings of microscopic bubbles can be nucleated around the laser-induced cavitation bubble. While generally acoustic nucleation is achieved with longitudinal waves of sufficient tension, this work demonstrates that acoustic cavitation can also be generated from transverse waves. Our experiments identify three waves originating at the boundaries: the fastest is the bulk wave in the solid, followed by a leaky Rayleigh wave at the liquid-solid contact, which is trailed by a Lamb-type wave. For the latter, the two solid boundaries act as a wave guide and generate intense and short-lived cavitation activity within the gap. Streak photography and high-speed photography reveal the microsecond-duration cavitation-bubble dynamics, and subpicosecond strobe photography visualizes the mechanism of bubble nucleation from the accelerated surface. Simulations coupling the solid mechanics with the acoustics support the experimentally observed mechanisms of transverse-wave-induced cavitation inception. |
| Databáze: | OpenAIRE |
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