一个矩形计算域中有一个圆形区域，圆形区域内的充满高压气体，计算域其他地方压强较低，当薄膜破裂，将会形成激波（欧拉方程编写）-A rectangular computational domain of a circular area, circular area filled with high-pressure gas within the computational domain elsewhere low pressure, when the film rupture, will form shock (Euler equation written)