NUMERICAL SIMULATION OF WAVES OVERTOPPING A BREAKWATER

The concept on the development of a numerical wave tank is described. The mathematical model is based on the two-dimensional Navier-Stokes equations and the continuity equation with the k-ε turbulence model involved. The SMAC method is employed to trace the time evolution of the velocity and the pressure field. To deal with the free surface, the Volume of Fluid (VOF) function, satisfying the advection equation, is introduced. The numerical wave tank is utilized to study waves overtopping over a vertical breakwater. The computed overtopping rate is compared with an existing chart based on laboratory experiments. The effects of the incident wave irregularity are also investigated.