Research Of Numerical Simulation For Offshore Wave Field Considering Different Revetments

The wave is one of the main dynamical factors to offshore engineering. Its calculation is always regarded. When the wind wave or the swell at the deep water area of the open sea propagate to the shallow water area near the seacoast, the wave propagation velocity, length, height, surface condition and so on all change obviously, because of the influences caused by the factors such as the water depth, the topography, the bottom friction, the obstacle, current and so on. Because the shallow water area is the main area for humanity practices active, the wave change at the shallow water area has the greatest influences to marine environment, resources and engineering construction and so on.In the coastal engineering,wave deformation and wave-induced current has been an important topic in coastal dynamics. A comprehensive numerical model for wave deformation and wave breaking plays an important role not only in practical application but also intheoretical research.At the same time, because of the different wave reflection on different revetments, rationally defining wave reflection also play an important role in numerical simulation.This paper summarized various Boussinesq-type wave-breaking models and analyzed some problems related to the application to the wave-induced current. In this thesis, first a full nonlinear Boussinesq wave model is established to simulate wave deformation in coastal area, and several terms are added into governing equations to simulate the effect of bottom friction, wave breaking and subgrid turbulent mixing. A Predictor-Corrector finite difference scheme was employed to solve the extended equations numerically.In order to verify the accuracy and applicability of the model, several numerical results from the model are compared with available physical experiment data. Comparisons show that numerical results agreed well with experimental data. Simultaneously, this paper has also discussed the wave reflection considering the different revetments based on two-point method conbined with model experiment, and provied the rational parameters of boundary condition in numerical simulation, and therefore, accuracy of sumulation has been improved.