Study For The Three-Dimensional Tidal Current Numerical Model In Xiamen Bay

In order to develop and utilize the ocean, solve the actual project question such as the engineering construction, the resources development, the route scour, the reduction of the city and the industry pollution and so on, we first must understand its hydrodynamic condition. The numerical simulation is an effective and economical method.The main task of this dissertation is to establish a three-dimensional numerical tidal model based on the three-dimensional tidal governing equations.1. The three-dimensional unconstringent hydro-control- equations for tidal flow are derived from the Navier-Stokes equations based on static pressure assumption, successional assumption and Boussinesq Approaching . The model is based on the Arakawa-C method, and forward-backward scheme has been used. The model is more accurate and efficient than Euler scheme.2. A numerical experiment concerned with the 3-D unsteady flow in a rectangular channel driven by tidal forcing at the open boundary has been done. By comparing the result with the analytical solution, the accuracy of the model has been verified.3. The tidal flow around Xiamen Bay has been simulated and discussed. The accuracy of the model has been verified further.4. Simulated W velocity of flow of direction of Z, and find seasonal movement of W velocity of flow.5. discuss the water body's movement using Lagrange particle analytical method.The simulative result tally with the actual survey situation, and has successfully simulated the tidal flow field w direction slight structural change.