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Numerical Study of the Collapse of a Bubble Subjected to a Lithotripter Pulse

Johnsen, Eric and Colonius, Tim (2006) Numerical Study of the Collapse of a Bubble Subjected to a Lithotripter Pulse. In: Fourth Joint Meeting: ASA and ASJ, 28 November-2 December 2006, Honolulu, HI. https://resolver.caltech.edu/CaltechAUTHORS:20190718-165128473

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Abstract

In shock wave lithotripsy, the combined effect of focused shock waves and cavitation pulverizes kidney stones. Although cavitation has been shown to play an important role in the stone comminution process, the underlying mechanism has yet to be fully understood. The goal of the present study is to quantify the potential damage caused by the collapse of a single bubble near a solid surface. Using a high‐order accurate quasiconservative, shock‐ and interface‐capturing scheme [E. Johnsen and T. Colonius, J. Comput. Phys., in press (2006)], the response of an air bubble subjected to a lithotripter pulse is considered. In particular, quantities important in cavitation erosion, such as wall stresses and reentrant jet velocity, are measured as functions of the properties of the pulse (amplitude, wavelength) and the geometry of the problem (stand‐off distance from the wall, presence of neighboring bubbles). Preliminary two‐dimensional results for a ‘‘cylindrical bubble’’ show that a large water‐hammer pressure is measured along the wall. This pressure increases for smaller stand‐off distances and longer wavelengths. Further results for spherical bubbles will be presented at the meeting.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
https://doi.org/10.1121/1.4787344DOIArticle
https://asa.scitation.org/doi/10.1121/1.4787344PublisherArticle
https://asa.scitation.org/toc/jas/120/5?tocSection=PROGRAM+OF+THE+FOURTH+JOINT+MEETING%3A+ASA+AND+ASJ&expanded=120PublisherConference Program
ORCID:
AuthorORCID
Colonius, Tim0000-0003-0326-3909
Additional Information:© 2006 Acoustical Society of America. Published Online: 24 October 2006. This work was supported by NIH Grant PO1 DK043881.
Funders:
Funding AgencyGrant Number
NIHPO1 DK043881
Subject Keywords:Organs; Shock waves; Reentrant; Medical diagnosis
Issue or Number:5
Record Number:CaltechAUTHORS:20190718-165128473
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190718-165128473
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97280
Collection:CaltechAUTHORS
Deposited By: Melissa Ray
Deposited On:26 Jul 2019 18:11
Last Modified:03 Oct 2019 21:30

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