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Proceedings Paper

Study Of The Cavitation Induced By A High Power Laser Beam
Author(s): P. Testud-Giovanneschi; P. Alloncle; D. Dufresne; Ph. Bournot; M. Autric
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Paper Abstract

This paper is concerned with a basic study of the cavitation induced by a high intensity laser beam. The present work is dealt in a first approach with the model of the initially only one spherical bubble, then followed by exploring the collective effects between several bubbles. The experimental setups producing one or several cavitation bubbles in the liquid (water) are at once described. The experimental apparatus (shadowgraph or Schlieren type) used to visualize bubbles and shock waves at high speed are also presented. Bubbles dynamics in infinite medium and near a solid wall are showed on sequential photographs (framing and streak). Oscillations, shock waves radiated upon collapse and jets developped towards the wall are also displayed. The comparison between experimental dynamics and numerical calculations prove that the evolution of optical cavitation bubbles is in good agreement with classical laws. This study of cavitation is extended to interacting effects when four bubbles are induced independently and simultaneously. The achieved visualizations show such interesting results as strong asymmetries, deformations, attraction or repulsion and premature collapses.

Paper Details

Date Published: 20 June 1989
PDF: 6 pages
Proc. SPIE 1031, 7th Intl Symp on Gas Flow and Chemical Lasers, (20 June 1989); doi: 10.1117/12.950572
Show Author Affiliations
P. Testud-Giovanneschi, Institut de Mecanique des Fluides (France)
P. Alloncle, Institut de Mecanique des Fluides (France)
D. Dufresne, Institut de Mecanique des Fluides (France)
Ph. Bournot, Institut de Mecanique des Fluides (France)
M. Autric, Institut de Mecanique des Fluides (France)

Published in SPIE Proceedings Vol. 1031:
7th Intl Symp on Gas Flow and Chemical Lasers
Dieter Schuoecker, Editor(s)

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