界面不稳定性实验的数值研究

采用多介质流体的三阶精度Piecewise Parabolic Method (PPM)计算方法对界面不稳定性实验模型进行数值模拟，通过对Lawrence LivermoreNational Laboratary(LLNL)实验室的果冻环实验模型的数值计算，获得了与其计算和实验图像基本一致的结果，从而验证和确认了计算方法和计算程序. 在此基础上，对于冲击波物理与爆轰物理实验室设计的果冻内外界面10模峰对峰、峰对谷振幅为1,mm扰动的界面不稳定性实验模型，给出了果冻内外界面位置、速度和加速度历史曲线，详细分析了果冻内外界面不稳定性的发展、演化过程，并给出了两种实验模型实验结果和对应的数值模拟结果.

NUMERICAL STUDY OF THE INTERFACE INSTABILITY EXPERIMENT

A multi-fluid parabolic piecewise method (MFPPM) is developed to simulation of the interface instabilities in this paper. To verification and validation our code MFPPM, one experiment model from Lawrence Livermore National Laboratory (LLNL) is simulated by MFPPM, the numerical results of the gelatin-ring excellent agreement with that experiment and simulation by CALE. At the same time, the two experiment models from our Laboratory for Shock Wave and Detonation Physics are given, in which the outer and the inner surfaces of the gelatin-ring are set by mode numbers 10, amplitude 1mm in top-top and top-bottom initially. Shape, position and acceleration of the outer and the inner surfaces of the gelatin-ring simulation results are presented, and the basic physics phenomena and numerical images are excellent consistent each other.