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首页> 外文期刊>Journal of Hydroinformatics >Moving particle semi-implicit method with improved pressures stability properties
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Moving particle semi-implicit method with improved pressures stability properties

机译:具有改进的压力稳定性能的运动粒子半隐式方法

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Moving particle semi-implicit (MPS) method is one of the Lagrangian methods widely used in engineering issues. This method, however, suffers from unphysical oscillations in its original form. In the present study, a modified incompressible MPS method is proposed to suppress these oscillations and is used for simulating free surface problems. To demonstrate the stability of the presented method, different kernel functions are used in the case of numerical dam break modeling as a benchmark simulation. A simple form of definition of curved wall boundaries is suggested which eliminates dummy particles and subsequently saves CPU time. Flow over an ogee spillway is simulated for the first time with the I-MPS method and as a new test case which has several curved lines in its geometry. The comparisons between theoretical solutions/experimental data and simulation results in terms of free surface and pressure show the accuracy of the method.
机译:移动粒子半隐式(MPS)方法是在工程问题中广泛使用的拉格朗日方法之一。然而,该方法遭受其原始形式的非物理振荡。在本研究中,提出了一种改进的不可压缩MPS方法来抑制这些振荡,并用于模拟自由表面问题。为了证明所提出方法的稳定性,在数值溃坝建模的情况下,使用不同的内核函数作为基准仿真。提出了一种定义弯曲墙边界的简单形式,它消除了虚拟粒子,从而节省了CPU时间。首次使用I-MPS方法模拟了ogee溢洪道上的水流,并将其作为一个新的测试用例进行了仿真,其几何形状具有多条曲线。理论解/实验数据与模拟结果在自由表面和压力方面的比较表明了该方法的准确性。

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