CAVITATION BUBBLE COLLAPSE IN VISCOUS COMPRESSIBLE LIQUIDS - NUMERICAL ANALYSIS
CAVITATION BUBBLE COLLAPSE IN VISCOUS COMPRESSIBLE LIQUIDS - NUMERICAL ANALYSIS
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DOI：
10.1115/1.3650853
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发表时间：
1965-01-01
期刊：
影响因子：
--
通讯作者：
HAMMITT, FG
中科院分区：
文献类型：
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作者：
IVANY, RD;HAMMITT, FG
通过流体动力学方程的数值解，研究了可压缩液体中球形气泡的坍缩，包括表面张力、粘度和气泡内气体绝热压缩的影响。对于可压缩和不可压缩的液体，剪切粘度的极限值会使气泡的破裂速度明显减慢，而中等粘度对破裂速度的影响很小。由于表面张力和粘度的加入，溶液中引入了两个结垢参数，因此单一的归一化溶液不再足以描述坍塌行为。可压缩液体的密度变化幅度和随时间的极快变化表明，通常的纳维-斯托克斯运动方程可能不合适。考虑了液体弛豫现象的可能性及其对声致发光的贡献。在离坍缩中心的初始半径相等的距离上，在液体中坍缩时不会产生激波或破坏性的高压，尽管如果气泡反弹，它们会在这样的距离上出现。
Collapse of a spherical bubble in a compressible liquid, including the effects of surface tension, viscosity, and an adiabatic compression of gas within the bubble is investigated by numerical solutions of the hydrodynamic equations. A limiting value of shear viscosity causes the bubble collapse to slow down markedly, for both compressible and incompressible liquids, whereas moderate viscosities have very little effect on the rate of collapse. The inclusion of surface tension and viscosity introduces two scaling parameters into the solution, so that a single normalized solution is no longer sufficient to describe collapse behavior. The magnitude of the density changes calculated for the compressible liquid and the extremely rapid changes with time suggest that the usual Navier-Stokes equation of motion may not be appropriate. The possibility of liquid relaxational phenomenon and its contribution to sonoluminescence is considered. Shock waves or damagingly high pressures are not generated during collapse at a distance in the liquid equal to the initial radius from the center of collapse, although they will appear at such a distance if the bubble rebounds.