Non-spherical collapse of an air bubble subjected to a lithotripter pulse
Abstract
In order to better understand the contribution of bubble collapse to stone comminution in shockwave lithotripsy, the shockinduced 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.
Additional Information
© 2007 American Society of Mechanical Engineers. This work was supported by NIH Grant POl DK043881 and ONR Grant NOOO 14-06-1-0730.Attached Files
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Additional details
- Eprint ID
- 19364
- Resolver ID
- CaltechAUTHORS:20100810-092143228
- NIH
- POl DK043881
- Office of Naval Research (ONR)
- N00014-06-1-0730
- Created
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2010-08-10Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field