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空化单气泡外围压强分布
引用本文:刘海军,安宇.空化单气泡外围压强分布[J].物理学报,2004,53(5):1406-1412.
作者姓名:刘海军  安宇
作者单位:清华大学物理系,北京,100084
基金项目:国家自然科学基金 (批准号 :10 1740 45 )资助的课题~~
摘    要:关键词

关 键 词:冲击波  激光诱发气泡  声空化  压强分布  非线性谐振  流体力学
文章编号:1000-3290/2004/53(05)/1406-07

Pressure distribution outside a single cavitation bubble
Liu Hai-Jun,An Yu.Pressure distribution outside a single cavitation bubble[J].Acta Physica Sinica,2004,53(5):1406-1412.
Authors:Liu Hai-Jun  An Yu
Abstract:Shape instabilities and diffusive instability are generally employed to investigate the stability of a single sonoluminescencing bubble, but the effect of the pressure outside a cavitation bubble is seldom studied. This paper particularly gives the pressure distribution outside a nonlinear resonance bubble by solving the Navier-Stokes equation outside the bubble. Numerical simulation shows that a negative pressure region appears in the vicinity of the bubble wall for those bubbles with a larger maximum radius, when the bubble is in its compressed phase, and which makes the bubble in the position of unstable equilibrium. We find that when the collapsing bubble approaches its minimum radius, a high pressure layer just outside the bubble is generated which gradually moves outward and subsequently forms a shock wave. Analysis indicates that the shock wave affects the measurement of the minimum radius of the bubble by Mie scattering; however, the effect is not dominant.
Keywords:acoustic cavitation  pressure distribution  shock wave  laser-induced bubble
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