Physics – Fluid Dynamics
Scientific paper
2011-09-28
Phys. Rev. Lett. 107, 204501 (2011)
Physics
Fluid Dynamics
4 page letter, 4 figures
Scientific paper
10.1103/PhysRevLett.107.204501
Cavitation bubbles collapsing and rebounding in a pressure gradient grad(p) form a "micro-jet" enveloped by a "vapor jet". This letter presents unprecedented observations of the vapor jets formed in a uniform gravity-induced grad(p), modulated aboard parabolic flights. The data uncovers that the normalized jet volume is independent of the liquid density and viscosity and proportional to zeta=grad(p)*R0/p, where R0 is the maximal bubble radius and p 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 zeta>0.0004.
Bosset Aurele de
Dorsaz Nicolas
Farhat Mohamed
Kobel Philippe
Obreschkow Danail
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