Experiments on the three-dimensional incompressible Richtmyer-Meshkov instability
Experiments on the three-dimensional incompressible Richtmyer-Meshkov instability
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DOI：
10.1063/1.2214647
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发表时间：
2006-07
影响因子：
4.6
通讯作者：
P. Chapman;J. Jacobs
中科院分区：
文献类型：
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作者：
P. Chapman;J. Jacobs
研究了具有三维单模初始扰动的不可压缩混相液体的三维richmyer - meshkov不稳定性。本研究使用Niederhaus和Jacobs早期实验的仪器[J]。流体力学，485,243(2003)]，其中不稳定性是由装有两种液体的容器的脉冲加速产生的。然而，目前的研究使用了一个方形横截面的坦克，允许通过沿坦克对角线的横向振荡产生方形模式的3D初始扰动。发现三维不稳定性的幅度测量可以通过二维（2D）研究中使用的无量纲缩放有效地折叠，并且在无量纲时间kν0t≈1之前与线性稳定性理论很好地一致，这比二维流动的结果要晚。后期三维振幅测量显示，与流行的气泡模型预测的相比，二维振幅增长更快。然而，发现后期增长率测量偏离模型…
The three-dimensional (3D) Richtmyer-Meshkov instability of incompressible, miscible liquids with a 3D single-mode initial perturbation is investigated. This study uses the apparatus of the earlier experiments of Niederhaus and Jacobs [J. Fluid Mech. 485, 243 (2003)] in which the instability is generated by impulsively accelerating a tank containing the two liquids. However, the present investigation uses a tank with square cross section allowing the generation of a square-mode 3D initial perturbation by lateral oscillation along the tank’s diagonal. Amplitude measurements of the 3D instability are found to be effectively collapsed by the dimensionless scaling used in the two-dimensional (2D) study and to be in good agreement with linear stability theory up until a dimensionless time kν0t≈1, later than is found for the 2D flow. Late-time 3D amplitude measurements show faster growth than 2D as is predicted by popular bubble models. However, late-time growth rate measurements are found to deviate from model...