| Abstract: | ![]()
The mechanical effect induced by the cavitati- on bubble collapse in the neighborhood of a solid boundary was 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 was detected at the epicenter of the rear metal surface. Furthermore, by combining a widely used laser ablation model with the detection principles of this detector, the transient impact force exerting on the target material could be easily estimated. Besides, according to experimental results and the modified Ray leigh theory, the maximum bubble radius and the liquid-jet pressure were also obtained, which are in good agreement with previous results, |
