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首页> 外文期刊>Journal of Computational Physics >Fast free-surface detection and level-set function definition in SPH solvers
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Fast free-surface detection and level-set function definition in SPH solvers

机译：SPH求解器中的快速自由表面检测和水平设置功能定义

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摘要

The present paper proposes a novel algorithm to detect the free-surface in particle simulations, both in two and three dimensions. Since the proposed algorithms are based on SPH interpolations their implementation does not require complex geometrical procedures. Thus the free-surface detection can be easily embedded in SPH solvers, without a significant increase of the CPU time. Throughout this procedure accurate normal vectors to the free-surface are made available. Then it is possible to define a level-set function algorithm which is presented in detail. The latter allows in-depth analyses of three-dimensional free-surface simulations by using standard visualization tools, including internal features of the flow. The algorithms proposed for detecting free-surface particles and defining the level-set function are validated on simple and complex two- and three-dimensional flow simulations. The usefulness of the proposed procedures to post-process and analyze complex flows are illustrated on realistic examples.
机译：本文提出了一种新颖的算法来检测二维和三维粒子模拟中的自由表面。由于所提出的算法基于SPH插值，因此其实现不需要复杂的几何过程。因此，自由表面检测可以轻松地嵌入到SPH求解器中，而不会显着增加CPU时间。在整个过程中，提供了自由表面的准确法线矢量。然后可以定义一个详细介绍的水平集函数算法。后者允许使用标准可视化工具（包括流的内部特征）对三维自由表面模拟进行深入分析。提出的用于检测自由表面粒子和定义水平集功能的算法在简单和复杂的二维和三维流动仿真中得到了验证。在现实的例子中说明了所提出的程序对后处理和分析复杂流的有用性。

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