NUMERICAL PREDICTION FOR COLLAPSE OF PERMEABLE DAM DUE TO OVERFLOWS WITH 3D MULTIPHASE-FLOW SOLVER (3D MICS)

The collapse of a permeable dam mainly due to overflows has been investigated with experiments and numerical studies. In order to numerically predict this process, the treatment of fluid forces acting on permeable materials is essentially important. In contrast to the previous numerical methods, 3D MICS, a computational method for incompressible multiphase fields, allows us to deal with the movement of solid bodies included in free-surface flows without any empirical formulations, such as a resistance coefficient, Cd. The validity of 3D MICS is discussed through the comparison with the experimental results.