Step-by-step improvement of MPS method in simulating violent free-surface motions and impact-loads
Step-by-step improvement of MPS method in simulating violent free-surface motions and impact-loads
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DOI：
10.1016/j.cma.2010.12.001
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发表时间：
2011-02
影响因子：
7.2
通讯作者：
Byung-Hyuk Lee;Jong-Chun Park;Moo-Hyun Kim;Sung-Chul Hwang
中科院分区：
文献类型：
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作者：
Byung-Hyuk Lee;Jong-Chun Park;Moo-Hyun Kim;Sung-Chul Hwang
使用移动粒子半隐式（MPS）方法对剧烈的自由表面运动和相应的冲击载荷进行数值模拟，该方法最初由 Koshizuka 和 Oka [10] 针对不可压缩流提出。原始MPS方法存在非最优源项、梯度和碰撞模型、自由表面粒子搜索等缺陷，导致流体运动精度较低和非物理压力波动。在本研究中，通过对修订后的 MPS 方法的各个过程的逐步改进来说明如何弥补这些缺陷。为了便于说明，我们研究了两个例子； (i) 溃坝问题和 (ii) 矩形水箱内的液体晃动。对每个步骤的改进进行了解释和数值论证。数值结果还与 Martin 和 Moyce [12] 针对溃坝问题以及 Kishev 等人的实验结果进行了比较。 [9] 晃动问题。剧烈自由表面运动和冲击压力的数值结果与其实验数据非常吻合。
The violent free-surface motions and the corresponding impact loads are numerically simulated by using the Moving Particle Semi-implicit (MPS) method, which was originally proposed by Koshizuka and Oka [10] for incompressible flows. In the original MPS method, there were several defects including non-optimal source term, gradient and collision models, and search of free-surface particles, which led to less-accurate fluid motions and non-physical pressure fluctuations. In the present study, how those defects can be remedied is illustrated by step-by-step improvements in the respective processes of the revised MPS method. For illustration, two examples are studied; (i) dam breaking problem and (ii) liquid sloshing inside a rectangular tank. The improvement of each step is explained and numerically demonstrated. The numerical results are also compared against the experimental results of Martin and Moyce [12] for dam-breaking problem and Kishev et al. [9] for sloshing problem. The numerical results for violent free-surface motions and impact pressures are in good agreement with their experimental data.