Abstract
The mechanical effect induced by the collapse of cavitation bubbles in the neighborhood of a solid boundary is investigated by focusing a Q-switched laser pulse on a metal target in water. By means of a fiber-coupling optical beam deflection technique, the displacement generated by liquid-jet impact at the final stage of the bubble collapse is detected at the epicenter of the rear metal surface. Furthermore, combining a widely used laser-ablation model with the detection principles of this detector, the transient impact-force value loading on the target material can be easily estimated. Besides, according to experimental results and the modified Rayleigh theory, the maximum bubble radius and the liquid-jet pressure are also obtained, which are in good agreement with the results of other studies. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1525–1528, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21706
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