Direct observation and theoretical study of cavitation bubbles in liquid mercury
Direct observation and theoretical study of cavitation bubbles in liquid mercury
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DOI：
10.1103/physreve.75.046304
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发表时间：
2007-04-01
影响因子：
2.4
通讯作者：
Futakawa, Masatoshi
中科院分区：
文献类型：
--
作者：
Ida, Masato;Naoe, Takashi;Futakawa, Masatoshi
对机械冲击作用下液态汞中产生的空化气泡进行了直接观测，并对实验结果进行了理论研究。通过一面玻璃墙，高速摄像机捕捉到了靠近或接触到玻璃墙的空化气泡的图像。利用考虑气泡-气泡和气泡-壁面相互作用的Rayleigh-Plesset型理论模型，讨论了实验测定的气泡生长速率与单气泡理论给出的气泡生长速率之间的差异。给出了多泡情况下的渐近增长率的理论方程，阐明了恒定负压下增长率随时间的变化关系。
The direct observation of cavitation bubbles emerging in liquid mercury under the action of mechanical impacts and theoretical investigations on the experimental results have been made. Through a glass wall, the image of cavitation bubbles appearing near or in contact with the wall was captured by high-speed cameras. Discrepancies found between the bubbles' growth rates determined experimentally and given by a single-bubble theory have been discussed using a theoretical model of Rayleigh-Plesset type that takes into account bubble-bubble and bubble-wall interactions. A theoretical equation for the asymptotic growth rate in a multibubble case has been given and time dependence of the growth rate under a constant negative pressure has been clarified.