3次元流体中を運動する接触と変形を考慮した任意形状固体モデルの数値解法

抄録

This paper presents a computational method to predict the movements of the arbitrarily-shaped solid objects transported in 3D free-surface flows. This method can deal with the collisions among the objects and their deformations as well as the fluid-solid interactions. A T-type model is employed, in which an object is represented by multiple tetrahedron elements and contact spheres are set up near the boundaries of the object. The T-type model allows us to evaluate the inertial tensors and fluid forces exactly, while it makes the evaluation of the contact forces much easy. Both T-type rigid and mass-spring models were implemented in the MICS, which is a solver for incompressible multiphase fluids, and their validity was discussed through the comparisons with experimental results.