Structure and dynamics of shock-induced nanobubble collapse in water.
Structure and dynamics of shock-induced nanobubble collapse in water.
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DOI：
10.1103/physrevlett.105.014503
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发表时间：
2010-07
影响因子：
8.6
通讯作者：
M. Vedadi;A. Choubey;K. Nomura;R. Kalia;A. Nakano;P. Vashishta;A. V. van Duin
中科院分区：
文献类型：
--
作者：
M. Vedadi;A. Choubey;K. Nomura;R. Kalia;A. Nakano;P. Vashishta;A. V. van Duin
采用基于反应力场的分子动力学模拟方法，研究了水中纳米气泡在冲击作用下的破裂行为。我们在气泡收缩开始时观察到聚焦射流，在气泡破裂时观察到二次激波。在对微米到毫米大小的气泡的实验中观察到，射流长度与纳米气泡的半径成线性关系。激波引起了剧烈的结构变化，在粒子速度为1公里/S的情况下出现了类似冰VII的结构基元。初始冰VII的形成和计算的Hugoniot曲线与实验结果符合得很好。
Shock-induced collapse of nanobubbles in water is investigated with molecular dynamics simulations based on a reactive force field. We observe a focused jet at the onset of bubble shrinkage and a secondary shock wave upon bubble collapse. The jet length scales linearly with the nanobubble radius, as observed in experiments on micron-to-millimeter size bubbles. Shock induces dramatic structural changes, including an ice-VII-like structural motif at a particle velocity of 1 km/s. The incipient ice VII formation and the calculated Hugoniot curve are in good agreement with experimental results.