Journal
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Volume 124, Issue 4, Pages 2011-2020Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.2973229
Keywords
-
Categories
Funding
- NIH [P01 DK043881]
- ONR [N00014-06-1-0730]
Ask authors/readers for more resources
The shock-induced collapse of a pre-existing nucleus near a solid surface in the focal region of a lithotripter is investigated. The entire flow field of the collapse of a single gas bubble subjected to a lithotripter pulse is simulated using a high-order accurate shock- and interface-capturing scheme, and the wall pressure is considered as an indication of potential damage. Results from the computations show the same qualitative behavior as that observed in experiments: a re-entrant jet forms in the direction of propagation of the pulse and penetrates the bubble during collapse, ultimately hitting the distal side and generating a water-hammer shock. As a result of the propagation of this wave, wall pressures on the order of I GPa may be achieved for bubbles collapsing close to the wall. The wall pressure decreases with initial stand-off distance and pulse width and increases with pulse amplitude. For the stand-off distances considered in the present work, the wall pressure due to bubble collapse is larger than that due to the incoming shockwave; the region over which this holds may extend to ten initial radii. The present results indicate that shock-induced collapse is a mechanism with high potential for damage in shockwave lithotripsy. (a) 2008 Acoustical Society of America. [DOI: 10.1121/1.2973229]
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available