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我们提出了一种跟踪活动相变界面的计算方法,以模拟激光—靶相互作用下物质的相变过程。方法的基本思想是:在远离相变界面的区域采用 von-Neumann 计算格式,在相变界面的附近利用连接条件与流体力学方程的双曲型特性建立特定的差分格式。利用一系列的计算公式和复杂的逻辑处理,把这些差分格式联系在一起形成一套完整的计算方法。
We propose a method of calculating the phase change interface of the tracking activity to simulate the phase transition of a material under laser-target interaction. The basic idea of the method is that the von-Neumann calculation format is used in the area far away from the phase change interface and a special difference format is established by using the hyperbolic characteristics of the connection condition and the hydrodynamic equation in the vicinity of the phase change interface. Using a series of computational formulas and complex logic processes, these differencing schemes are linked together to form a complete set of computational methods.