论文标题
自由表面流的平滑粒子流体动力学中的高临界性三维表面检测
High-accuracy three-dimensional surface detection in smoothed particle hydrodynamics for free-surface flows
论文作者
论文摘要
在这项研究中，我们研究了自由表面流的平滑颗粒流体动力学中的高临界性三维表面检测。首先开发了一种新的几何方法，以增强复杂流中自由表面粒子检测的准确性。该方法通过锥形区域的粒子球体内部连续的全局扫描来检测自由表面的颗粒，其顶点对应于粒子位置。如果存在没有相邻颗粒的锥体区域，则该粒子被识别为自由地面粒子。接下来，提出了一种基于几何方法来降低计算成本的有效的半地形方法。它包括通过位置差异在自由表面附近找到颗粒，然后使用几何方法检测这些颗粒以识别自由表面颗粒。通过对几个模型问题进行测试来证明所提出方法的准确性和鲁棒性。
In this study, we investigate high-accuracy three-dimensional surface detection in smoothed particle hydrodynamics for free-surface flows. A new geometrical method is first developed to enhance the accuracy of free-surface particle detection in complex flows. This method detects free-surface particles via continuous global scanning inside the sphere of a particle through a cone region whose vertex corresponds to the particle position. The particle is identified as a free-surface particle if there exists a cone region with no neighboring particles. Next, an efficient semi-geometrical method is proposed based on the geometrical method to reduce the computational cost. It consists of finding particles near the free surface via position divergence and then detecting these particles using the geometrical method to identify free-surface particles. The accuracy and robustness of the proposed method are demonstrated by performing tests on several model problems.
