Faculty of Mechanical Engineering, Lj. (FSLJ)
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Investigation of a cavitation bubble between a rigid boundary and a free surfaceGregorčič, Peter ; Petkovšek, Rok ; Možina, Janez, fizik, 1945-When a high-intensity laser pulse is focused into a liquid the energy is converted into mechanical energy via an optodynamic process. The conversion starts with plasma formation: this is followed by ... shock-wave propagation and the expansion of a cavitation bubble. A cavitation bubble developed near boundaries results in an asymmetrical collapse, with the generation of a liquid jet during the bubble's rebound. In the case of a free surface this liquid jet is directed away from the surface and the oscillation times are prolonged. On the other hand, in the case of a rigid boundary, the liquid jet is directed toward the boundary and the oscillation times are shortened. We present measurements of a cavitation bubble oscillating between a free surfaceand a rigid boundary using deflections of a laser beam as the optical probe. Shadow photography was used simultaneously as a comparison during the experiments. With the beam-deflection probe we also measured the shortening ofthe oscillation times near a free surface as well as the prolongation of oscillation times near a rigid boundary. In order to explain this shortening of the cavitation-bubble oscillation times near a free surface, Rayleighćs model was extended and compared with our experimental results.Source: Journal of applied physics. - ISSN 0021-8979 (Issue 9, Vol. 102, 2007, 8 str.)Type of material - article, component partPublish date - 2007Language - englishCOBISS.SI-ID - 10236699
Author
Gregorčič, Peter |
Petkovšek, Rok |
Možina, Janez, fizik, 1945-
Topics
optodinamika |
kavitacija |
mehurčki |
pulzni laserji |
laserske meritve |
optodynamic process |
caviation bubbles |
jets |
oscillations |
plasma shock waves |
Rayleigh waves
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Gregorčič, Peter | 29224 |
Petkovšek, Rok | 15646 |
Možina, Janez, fizik, 1945- | 01649 |
Source: Personal bibliographies
and: SICRIS
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