AN IMPROVEMENT OF DIRICHLET BOUNDARY CONDITIONS IN NUMERICAL SIMULATIONS USING MPS METHOD

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  • MPS法における圧力ポアソン方程式のディリクレ境界条件判定の改善

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 In the coastal engineering field, the particle method called MPS method is expected to apply to simulate fluid-structure interaction problems such as wave pressure on a breakwater. However, it has been revealed that the accuracy of the particle method for hydraulic pressure is less than other numerical method, since the numerical result by the particle method usually has numerical irregular oscillations of pressure value. The authors propose improvement methods of judgment of dirichlet boundary conditions for the Poisson equation of pressure. The accuracy of the proposed method is verified for the simulation of a static water problem and the collapse of water column. In addition, the results of numerical simulation of a tank sloshing of water are compared with experimental results. The improved MPS method showed high reduction of irregular numerical oscillations of pressure. It can be expected to apply to numerical simulations of high frequency hydraulic pressure oscillations such as a shock wave pressure.

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