Fluid-Rigid Body Interaction Analysis for Mesh-Free Particle Method with Polygon Boundary Representation
Fluid-Rigid Body Interaction Analysis for Mesh-Free Particle Method with Polygon Boundary Representation
复制标题
具有多边形边界表示的无网格粒子法的流-刚体相互作用分析
DOI：
10.11345/nctam.64.133
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
S. Yoshimura
中科院分区：
文献类型：
--
作者：
Y. Mizuno;N. Mitsume;T. Yamada;S. Yoshimura
本文提出了一种基于粒子的自由面流与基于刚体动力学的刚体动力学相互作用模型。在我们提出的模型中，我们采用多边形壁边界模型来表示二维空间中的刚体。与传统的基于粒子的刚体表示方法相比，多边形表示方法更适合于复杂形状的刚体表示。我们制定的模型，使流体和刚体之间的力平衡的界面。我们采用的是刚体的物理量的基于曲率的计算，它只需要刚体表面的信息。基于自由落体圆柱问题对所提模型进行了验证，并将结果与浮体平衡状态下的理论解进行了比较。
This paper proposes an interaction model between particle-based free-surface flow and polygonbased rigid body dynamics. In our proposed model, we adopt a polygon wall boundary model to represent a rigid body in two-dimensional space. The polygon representation of rigid body is more flexible to express complicated-shaped rigid body compared with conventional particle-based representation. We formulate the model so that forces between fluid and rigid body are balanced on their interface. We employ polygon-based calculations of physical values for a rigid body, which only requires information of rigid body surfaces. A verification test for the proposed model is performed based on a free falling cylinder problem, and the result is compared with a theoretical solution in an equilibrium state of floating body.