NUMERICAL PREDICTION FOR COMPLICATED-SHAPED BLOCKS DUMPED INTO WATER WITH A MULTI-PHASE NUMERICAL MODEL

Abstract

It is important to evaluate the falling and accumulating processes of the complicated-shaped blocks dumped to river and sea bottoms to create artificial fishery area. This paper presents a computational method for multiphase fields with a T-type solid model, which allows us to deal with the movements and collisions of the complicated-shaped objects in free-surface flows. In the T-type model, an object is represented by multiple tetrahedron elements and contact-spheres are placed near the surfaces. Thus, the volume, mass and inertial tensors are accurately represented, while the computational load to treat collisions of the objects is quite small. It was shown that the accumulation of the multiple blocks dumped into a water tank was reasonably predicted by the present method.