Versatile Rigid-Fluid Coupling for Incompressible SPH
Versatile Rigid-Fluid Coupling for Incompressible SPH
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DOI：
10.1145/2185520.2185558
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发表时间：
2012-07-01
影响因子：
6.2
通讯作者：
Teschner, Matthias
中科院分区：
文献类型：
--
作者：
Akinci, Nadir;Ihmsen, Markus;Teschner, Matthias
提出了一种基于流体动力的SPH流体与任意刚体的动量守恒双向耦合方法。我们的方法对具有与流体相互作用的边界粒子的刚体表面进行采样，从而防止缺陷问题以及空间和时间的不连续性。非均匀边界采样的问题是通过考虑一个边界粒子的相对贡献的物理量。这不仅有利于初始化过程，而且还允许模拟多个动态对象。仅由一层或一条边界粒子线组成的薄结构以及非流形几何形状可以在没有任何额外处理的情况下处理。我们已经将我们的方法集成到WCSPH和PCISPH中，并在包括多相流在内的几种情况下证明了其稳定性和灵活性。
We propose a momentum-conserving two-way coupling method of SPH fluids and arbitrary rigid objects based on hydrodynamic forces. Our approach samples the surface of rigid bodies with boundary particles that interact with the fluid, preventing deficiency issues and both spatial and temporal discontinuities. The problem of inhomogeneous boundary sampling is addressed by considering the relative contribution of a boundary particle to a physical quantity. This facilitates not only the initialization process but also allows the simulation of multiple dynamic objects. Thin structures consisting of only one layer or one line of boundary particles, and also non-manifold geometries can be handled without any additional treatment. We have integrated our approach into WCSPH and PCISPH, and demonstrate its stability and flexibility with several scenarios including multiphase flow.