Universal scaling law for jets of collapsing bubbles.
- Obreschkow D Laboratoire des Machines Hydrauliques, EPFL, Lausanne, Switzerland.
- Tinguely M
- Dorsaz N
- Kobel P
- de Bosset A
- Farhat M
- 2011-12-21
Published in:
- Physical review letters. - 2011
English
Cavitation bubbles collapsing and rebounding in a pressure gradient ∇p form a "microjet" enveloped by a "vapor jet." This Letter presents unprecedented observations of the vapor jets formed in a uniform gravity-induced ∇p, modulated aboard parabolic flights. The data uncover that the normalized jet volume is independent of the liquid density and viscosity and proportional to ζ ≡ |∇p|R(0)/Δp, where R(0) the maximal bubble radius and Δp is the driving pressure. A derivation inspired by "Kelvin-Blake" considerations confirms this law and reveals its negligible dependence of surface tension. We further conjecture that the jet only pierces the bubble boundary if ζ ≳ 4 × 10(-4).
- Language
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- English
- Open access status
- hybrid
- Identifiers
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- DOI 10.1103/PhysRevLett.107.204501
- PMID 22181734
- Persistent URL
- https://sonar.ch/global/documents/16008
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