Characterization of the bubble cluster and velocity field in the focal region of a lithotripter

被引：1
|
作者：
Buick, J. M. [1 ]
Cosgrove, J. A.
Eizenhoefer, H.
Higham, R.
Royles, R.
机构：
[1] Univ New England, Armidale, NSW 2351, Australia
[2] Univ Edinburgh, Sch Phys, Fluid & Acoust Grp, Edinburgh EH9 3JZ, Midlothian, Scotland
[3] ETTC Biospace, Profess Sci Ltd, Edinburgh EH9 3JF, Midlothian, Scotland
[4] Dornier MedTech Syst GmbH, D-82234 Wessling, Germany
[5] Univ Edinburgh, Sch Elect Engn, Inst Infrastructrue & Environm, Edinburgh EH9 3JN, Midlothian, Scotland
来源：
NEW JOURNAL OF PHYSICS | 2007年 / 9卷
关键词：
D O I：
10.1088/1367-2630/9/7/240
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The cavitation bubble cluster and the velocity field in the focal region of a lithotripter are investigated. Images of the bubble cluster were captured which show the bubbles increasing in size over approximately 500 mu s before collapsing rapidly. Velocity measurements were obtained using particle image velocimetry. A few milliseconds after the inception of cavitation the velocity field consisted of localized flows with maximum velocities and shear rates of the order of 100mm s(-1) and 50 s(-1) respectively. At times 40 ms after cavitation an average uni-directional flow of the order of 10mm s(-1) was observed. The mechanism by which the flow is generated is also considered.
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页数：16
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