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光滑离子流体动力学(SPH)法是一种纯拉格朗日(Lagrange)无网格方法,近年来发展日趋成熟。对SPH法的基本原理、核函数及控制方程离散格式、边界处理方法等进行了介绍。在此基础上建立了数值水槽模型,模拟了立面二维溃坝流动问题,并将所得结果与VOF法及模型试验得到的结果进行比较,结果表明:SPH法能够捕捉到流体的飞溅及融合现象,适于模拟具有瞬时极大变形等物理力学问题。
The Smooth Ion Hydrodynamics (SPH) method is a pure Lagrange meshless method and its maturation has been matured in recent years. The basic principles of the SPH method, the discrete function of the kernel function and control equations, the boundary treatment methods are introduced. On the basis of this, a numerical model of sink was established to simulate the two-dimensional dam flow problem. The results obtained were compared with those obtained by the VOF method and the model test. The results show that the SPH method can capture the spatter and fusion Phenomenon, suitable for simulating physical and mechanical problems with instantaneous great deformation.