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Proceedings Paper

Interactions of laser-induced cavitation bubbles with a rigid boundary
Author(s): Barry Ward; David C. Emmony
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Paper Abstract

Although the dynamics of cavitation bubbles near rigid boundaries have been widely studied using conventional high-speed photographic and schlieren techniques, no quantitative optical measurements of the pressure changes which arise within the liquid and solid media have previously been reported. In this paper, we present a series of high-speed Mach-Zehnder video interferograms of a Nd:YAG laser-induced cavity in water at a distance of 2.7 mm from a plane PMMA boundary. During the first cycle of oscillation, a maximum cavity radius of 1 mm is attained and a translational motion towards the solid wall is observed during which three complete radial oscillations occur. The asymmetrical build-up of pressure in the surrounding liquid during bubble collapse and the subsequent emission of spherical acoustic transients with peak pressures in the order of 100 bars are related to the initial cavity position and size. By viewing the propagation of these acoustic waves across the rigid boundary and into the PMMA, direct measurements of peak stresses in the bulk solid are made.

Paper Details

Date Published: 1 April 1991
PDF: 11 pages
Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); doi: 10.1117/12.23948
Show Author Affiliations
Barry Ward, Univ. of Technology (United Kingdom)
David C. Emmony, Univ. of Technology (United Kingdom)

Published in SPIE Proceedings Vol. 1358:
19th Intl Congress on High-Speed Photography and Photonics
Peter W. W. Fuller, Editor(s)

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