A generalized wall boundary condition for smoothed particle hydrodynamics
A generalized wall boundary condition for smoothed particle hydrodynamics
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DOI：
10.1016/j.jcp.2012.05.005
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发表时间：
2012-08-30
影响因子：
4.1
通讯作者：
Adams, N. A.
中科院分区：
文献类型：
--
作者：
Adami, S.;Hu, X. Y.;Adams, N. A.
在本文中，我们介绍了SPH模拟中静态和移动实心壁的边界条件的新公式。我们的一般方法既适用于两个和三维，并且与以前的壁边界配方相比非常简单。基于壁和流体颗粒之间的局部力量平衡，我们在固体颗粒上施加压力边界条件，以防止壁穿透。该方法可以处理尖锐的角落和复杂的几何形状，如几个示例所示。验证表明，我们在静态储罐中恢复了静水平衡条件，并比较了经典的大坝断裂模拟与最先进的文献导致文献中的比较表现出良好的一致性。我们模拟了各种问题，例如气缸周围的流量以及RE = 100处的向后面向步骤，以证明这种新方法的一般适用性。 （c）2012年由Elsevier Inc.发布
In this paper we present a new formulation of the boundary condition at static and moving solid walls in SPH simulations. Our general approach is both applicable to two and three dimensions and is very simple compared to previous wall boundary formulations. Based on a local force balance between wall and fluid particles we apply a pressure boundary condition on the solid particles to prevent wall penetration. This method can handle sharp corners and complex geometries as is demonstrated with several examples. A validation shows that we recover hydrostatic equilibrium conditions in a static tank, and a comparison of the classical dam break simulation with state-of-the-art results in literature shows good agreement. We simulate various problems such as the flow around a cylinder and the backward facing step at Re = 100 to demonstrate the general applicability of this new method. (C) 2012 Published by Elsevier Inc.