Numerical Simulation of Nonlinear Behavior of Three-Dimensional Ocean Waves Interacting with Obstacles

A three-dimensional finite-difference method for ocean wave problems called TUMMAC-IVw is developed. The method can cope with the interaction of ocean waves with floating or submerged bodies of an arbitrary shape. The treatment of free surface condition is especially modified in order to suit to the oscillatory motion of ocean waves. Simulated results are presented and discussed for the two problems, namely, the wave diffraction at the bow of a blunt ship and the wave deformation over a submerged mountainous obstacle.