In order to better understand the contribution of bubble collapse to stone comminution in shockwave lithotripsy, the shock-induced and Rayleigh collapse of a spherical air bubble is investigated using numerical simulations, and the free-field collapse of a cavitation bubble is studied experimentally. In shock-induced collapse near a wall, it is found that the presence of the bubble greatly amplifies the pressure recorded at the stone surface; the functional dependence of the wall pressure on the initial standoff distance and the amplitude are presented. In Rayleigh collapse near a solid surface, the proximity of the wall retards the flow and leads to a more prominent jet. Experiments show that re-entrant jets form in the collapse of cavitation bubbles excited by lithotripter shockwaves in a fashion comparable to previous studies of collapse near a solid surface.
Non-Spherical Collapse of an Air Bubble Subjected to a Lithotripter Pulse
- Views Icon Views
- Share Icon Share
- Search Site
Johnsen, E, Colonius, T, Kreider, W, & Bailey, MR. "Non-Spherical Collapse of an Air Bubble Subjected to a Lithotripter Pulse." Proceedings of the ASME 2007 International Mechanical Engineering Congress and Exposition. Volume 2: Biomedical and Biotechnology Engineering. Seattle, Washington, USA. November 11–15, 2007. pp. 285-294. ASME. https://doi.org/10.1115/IMECE2007-43156
Download citation file: