Moving-particle semi-implicit method for fragmentation of incompressible fluid
Moving-particle semi-implicit method for fragmentation of incompressible fluid
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DOI：
10.13182/nse96-a24205
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发表时间：
1996-07-01
影响因子：
1.2
通讯作者：
Oka, Y
中科院分区：
文献类型：
--
作者：
Koshizuka, S;Oka, Y
提出了一种模拟不可压缩流体破碎的移动粒子半隐式（MPS）方法。每个粒子的运动通过与覆盖有核函数的相邻粒子的相互作用来计算。确定性粒子相互作用模型表示梯度，拉普拉斯，和自由表面的建议。流体密度被隐含地要求为常数作为不可压缩性条件，而其他项被显式地计算。采用不完全Cholesky共轭梯度法求解压力的Poisson方程。使用MPS计算水柱的塌陷。模型中的参数的影响进行了研究，在测试计算。即使发生流体的破碎和聚结，也能获得与实验良好的一致性。
A moving-particle semi-implicit (MPS) method for simulating fragmentation of incompressible fluids is presented. The motion of each particle is calculated through interactions with neighboring particles covered with the kernel function. Deterministic particle interaction models representing gradient, Laplacian, and free surfaces are proposed. Fluid density is implicitly required to be constant as the incompressibility condition, while the other terms are explicitly calculated. The Poisson equation of pressure is solved by the incomplete Cholesky conjugate gradient method. Collapse of a water column is calculated using MPS. The effect of parameters in the models is investigated in test calculations. Good agreement with an experiment is obtained even if fragmentation and coalescence of the fluid take place.