Numerical simulations of single-mode Richtmyer-Meshkov experiments
Numerical simulations of single-mode Richtmyer-Meshkov experiments
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DOI：
10.1103/physreve.58.4548
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发表时间：
1998-10
影响因子：
2.4
通讯作者：
C. Mügler;S. Gauthier
中科院分区：
文献类型：
--
作者：
C. Mügler;S. Gauthier
对激波加速的轻、重流体界面的流体不稳定性进行了二维数值模拟，得到了与实验非常相似的流型。此外，数值和实验的幅度增长率是一致的，并且以类似的方式在时间上衰减。利用两种不同的方法对流动进行了频谱分析。峰峰值在波长上可以用50个网格区重现，而分子粘性耗散引起的流动动能在时间上的衰减需要360个波长区和一个二阶精确的时空数值格式才能正确描述。
Two-dimensional numerical simulation of the fluid instability of a shock-accelerated interface between a light fluid and a heavy one shows a flow pattern very similar to experimental pictures. Furthermore, numerical and experimental amplitude growth rates are in good agreement and are decaying in time in a similar way. Spectral analysis of the flow is performed with the help of two different methods. The peak-to-peak amplitude can be reproduced with 50 mesh zones in the wavelength whereas the streamwise kinetic energy decay in time due to molecular viscous dissipation requires 360 zones in the wavelength and a second-order accurate numerical scheme in space and time to be correctly described.