Experimental study of incompressible Richtmyer–Meshkov instability
Experimental study of incompressible Richtmyer–Meshkov instability
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DOI：
10.1063/1.868794
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发表时间：
1996-02
影响因子：
4.6
通讯作者：
J. Jacobs;J. Sheeley
中科院分区：
文献类型：
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作者：
J. Jacobs;J. Sheeley
对两液体系的Richtmyer-Meshkov不稳定性进行了实验研究。这些实验利用了一种新技术，绕过了以前限制Richtmyer-Meshkov不稳定性研究的许多实验困难。这种不稳定性是通过垂直加速装有两层液体的储罐，使其从固定的螺旋弹簧上反弹而产生的。通过在水平方向上振动容器来产生驻波，给界面提供了受控的二维正弦初始形状。在实验过程中，使用标准视频摄影来记录界面的运动。测量了不稳定增长率，并与现有的线性理论进行了比较。测量的增长率与理论之间的不一致归因于有限的反弹长度。当将线性稳定性理论修正为考虑有限持续时间的加速度脉冲时，得到了更好的一致性。许多不同品种的后期生长曲线。
The Richtmyer–Meshkov instability of a two‐liquid system is investigated experimentally. These experiments utilize a novel technique that circumvents many of the experimental difficulties that have previously limited the study of Richtmyer–Meshkov instability. The instability is generated by vertically accelerating a tank containing two stratified liquids by bouncing it off of a fixed coil spring. A controlled two‐dimensional sinusoidal initial shape is given to the interface by oscillating the container in the horizontal direction to produce standing waves. The motion of the interface is recorded during the experiments using standard video photography. Instability growth rates are measured and compared with existing linear theory. Disagreement between measured growth rates and the theory are accredited to the finite bounce length. When the linear stability theory is modified to account for an acceleration pulse of finite duration, much better agreement is attained. Late time growth curves of many differe...