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Energy density, temperature, and pressure upon generation and collapse of spherical cavitation bubbles in water produced by femtosecond optical breakdown

By: Paltauf, G.; Freidank, S.; Linz, N.; Vogel, A.;

2009 / IEEE / 978-1-4244-4079-5

Description

This item was taken from the IEEE Conference ' Energy density, temperature, and pressure upon generation and collapse of spherical cavitation bubbles in water produced by femtosecond optical breakdown ' Optical breakdown and spherical bubble collapse are two different nonlinear mechanisms producing a large energy density within a small spatial region. Extreme states of matter with pressures p up to 107 MPa (100 Megabar) for femtosecond optical breakdown, and temperatures T ranging from 104 up to 108 K for the collapse of bubbles oscillating in a sound field have been reported [1,2]. However, because of the small spatial and temporal scale on which the extremes occur, it is impossible to directly measure p and T but they have to be inferred from other experimental information and equation of state (EOS) data, which is a challenging task.