Numerical Model Study On The Interaction Of Waves And Tidal Currents

Waves and tidal currents are the major dynamic factors in the area of estuary and coast. The phenomenon of interactions between currents and waves appear frequently. Therefore, the study on the simulation of the interaction between tidal currents and waves is very important. In this paper, the development of tidal currents and waves modeling, calculating methods, the ranges of application, and the used grid have been summarized. On the basis of 2D tidal currents basic equation, the movement basic equation of the interactions between currents and waves is deduced. Then the numerical model of waves and tidal currents is established under the orthogonal curvilinear system. Tidal currents and waves modeling have been verified by the data of flume experiment. The wave heights have been calculated by wave refraction and diffraction model. The flow fields under different wave situations are calculated by the waves and tidal currents numerical model. The tidal level and velocities of flow are compared respectively with the results on the condition of wave and no wave. The effect of wave to the tidal level and velocities is given.