Improvement of stability in moving particle semi‐implicit method
Improvement of stability in moving particle semi‐implicit method
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DOI：
10.1002/fld.2207
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发表时间：
2011-02
影响因子：
1.8
通讯作者：
M. Kondo;S. Koshizuka
中科院分区：
文献类型：
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作者：
M. Kondo;S. Koshizuka
移动粒子半隐式（MPS）方法是粒子方法中的一种，它可以用来分析不可压缩的自由表面流动，而不需要用网格或标量进行表面跟踪。然而，MPS引起了高压的非物理数值振荡。提出了压力泊松方程源项的一个新表达式。所提出的源项由三个部分组成，一个主要部分和两个误差补偿部分。通过适当选择误差补偿部分的系数，可以抑制非物理压力振荡。在静水压力和溃坝问题中得到了更平滑的压力分布。版权所有©2010 John Wiley & Sons， Ltd
Moving particle semi‐implicit (MPS) method is one of the particle methods, which can be used to analyze incompressible free surface flow without surface tracking by a mesh or a scalar quantity. However, MPS causes unphysical numerical oscillation of pressure with high frequencies. We proposed a new formulation for the source term of Poisson equation of pressure. The proposed source term consists of three parts, one main part and two error‐compensating parts. With proper selection of the coefficients for the error‐compensating parts, we can suppress the unphysical pressure oscillation. Smoother pressure distributions are obtained in hydrostatic pressure and dam break problems. Copyright © 2010 John Wiley & Sons, Ltd.