Nanosecond near-spinodal homogeneous boiling of water superheated by a pulsed CO{sub 2} laser
- Department of Physics, Arkansas State University, State University, Arkansas 72467-0419 (United States)
The fast boiling dynamics of superheated surface layers of bulk water cavitating under near-spinodal conditions during nanosecond CO{sub 2} laser heating pulses was studied using contact broad-band photoacoustic spectroscopy. Characteristic pressure-tension cycles recorded by an acoustic transducer at different incident laser fluences represent (a) weak random oscillations of transient nanometer-sized near-critical bubbles-precursors and (b) well-defined stimulated oscillations of micron-sized supercritical bubbles and their submicrosecond coalescence products. These findings provide an important insight into basic thermodynamic parameters, spatial and temporal scales of bubble nucleation during explosive liquid/vapor transformations in absorbing liquids ablated by short laser pulses in the thermal confinement regime.
- OSTI ID:
- 21072405
- Journal Information:
- Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 75, Issue 3; Other Information: DOI: 10.1103/PhysRevE.75.036313; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-651X
- Country of Publication:
- United States
- Language:
- English
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