中文摘要：

适应的树网孔的技术是根据必要性通过房间尺寸的自动调整减少计算费用的一个有效方法。在现在的学习， 2D 数字 N-S 解答者基于适应 quadtree 网孔系统被扩大到 3D，一个空间地适应的 octree 网孔系统和多重粒子水平集合方法在被采用多重媒介的共存让便利处理 air-water-structure 域。一个哑铃的拉长的过程被模仿，结果显示网孔对免费表面很好能适应。侵犯圆柱体的水列的崩溃过程被模仿并且从结果，切开并且合并的液体的过程适当地被模仿，这能被看见。秒顺序的相互作用司烧有方形的柱体的波浪被模仿并且获得拖力量与由有马厩的价值拖部件和惯性的力量部件正在被放作为 2.54 的系数的 Morisons 波浪力量公式的结果一致。

英文摘要：

The technique of adaptive tree mesh is an effective way to reduce computational cost through automatic adjustment of cell size according to necessity. In the present study, the 2D numerical N-S solver based on the adaptive quadtree mesh system was extended to a 3D one, in which a spatially adaptive oetree mesh system and multiple particle level set method were adopted for the convenience to deal with the air-water-structure multiple-medium coexisting domain. The stretching process of a dumbbell was simulated and the results indicate that the meshes are well adaptable to the free surface. The collapsing process of water column impinging a circle cylinder was simulated and from the results, it can be seen that the processes of fluid splitting and merging are properly simulated. The interaction of second-order Stokes waves with a square cylinder was simulated and the obtained drag force is consistent with the result by the Morison＇s wave force formula with the coefficient values of the stable drag component and the inertial force component bein~ set as 2.54.