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.
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ASME 2007 International Mechanical Engineering Congress and Exposition
November 11–15, 2007
Seattle, Washington, USA
Conference Sponsors:
- ASME
ISBN:
0-7918-4296-7
PROCEEDINGS PAPER
Non-Spherical Collapse of an Air Bubble Subjected to a Lithotripter Pulse
Eric Johnsen,
Eric Johnsen
California Institute of Technology, Pasadena, CA
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Tim Colonius,
Tim Colonius
California Institute of Technology, Pasadena, CA
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Wayne Kreider,
Wayne Kreider
University of Washington, Seattle, WA
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Michael R. Bailey
Michael R. Bailey
University of Washington, Seattle, WA
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Eric Johnsen
California Institute of Technology, Pasadena, CA
Tim Colonius
California Institute of Technology, Pasadena, CA
Wayne Kreider
University of Washington, Seattle, WA
Michael R. Bailey
University of Washington, Seattle, WA
Paper No:
IMECE2007-43156, pp. 285-294; 10 pages
Published Online:
May 22, 2009
Citation
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
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