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分析了二维情况下平面几何、柱几何和球几何中瑞利 泰勒不稳定性发生非线性偏离的阈值问题 ,给出了三种几何中密度扰动振幅的定义 ,以及与界面扰动振幅的关系 .由此得到了三种几何中密度扰动的非线性阈值公式 ,用高精度流体程序对三种几何中的不稳定性进行了数值模拟 ,验证了得到的非线性阈值公式
The threshold problem of Rayleigh Taylor instability in plane geometry, column geometry and sphere geometry is analyzed. The definition of the amplitude of three kinds of geometric medium density disturbances and the relationship between them are also given. Three kinds of geometric thresholds of medium density perturbation are obtained, and the instabilities in the three geometries are numerically simulated with a high precision fluid program. The obtained nonlinear threshold formula