Smoothed particle hydrodynamics in complex shapes
Smoothed particle hydrodynamics in complex shapes
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DOI：
10.1145/2614348.2614375
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
T. Harada;S. Koshizuka;Y. Kawaguchi
中科院分区：
文献类型：
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作者：
T. Harada;S. Koshizuka;Y. Kawaguchi
在本文中，我们提出了一种改进的平滑粒子流体动力学（一种用于流体模拟的粒子方法）中的壁边界计算模型。通常，粒子方法通过将其转换为壁粒子来计算壁边界。所提出的方法使用根据多边形模型计算的距离函数作为墙边界。因此，可以轻松模拟复杂形状的流体运动。由于该方法不使用壁粒子，因此能够在不增加粒子分辨率的情况下表示壁边界。当边界由壁粒子表示时，我们必须生成大量的壁粒子。壁粒子数占粒子总数的比例较高。然而所提出的方法不需要壁粒子，它可以减少粒子总数。模拟之后，通常会构建表面网格以可视化粒子的模拟结果。然而，很难用它们产生光滑的表面。我们还提出了一种可视化方法，可以构造与壁边界接触的光滑流体表面。
In this paper, we propose an improved computation model of wall boundary in Smoothed Particle Hydrodynamics, a particle method for fluid simulation. Generally, particle methods calculate a wall boundary by converting it to wall particles. The proposed method uses a distance function calculated from a polygon model as a wall boundary. As a result, fluid motion in complex shapes can be simulated easily. Since the method does not use wall particles, it is able to represent a wall boundary without increasing the particle resolution. When a boundary is represented by wall particles, we have to generate a large number of wall particles. The proportion of the number of wall particles in total number of particles is high. However the proposed method does not need wall particles, it can reduce the total number of particles. After the simulation, surface mesh is usually constructed to visualize a simulation result from particles. However, it is difficult to generate smooth surface from them. We also propose a visualization method which can construct smooth fluid surfaces contacting with a wall boundary.