Numerical Studies Of Overtopping Over Slope Dike Based On Mass Source

Slope dike is an effective barrier against the disasters of waves and an important part of the coastal port which is artificial covered. Overtopping is an important design parameter to design a slope dike, and this parameter is mainly used to determine the top elevation of the slope dike. Considering the security and economic cost, it is particularly important to predict the overtopping of slope dike and to formulate the overtopping standards.The numerical model is developed based on FLUENT software, Reynolds-Average N-S equation and k-ε turbulence model. A two dimensional numerical wave flume which can eliminate the secondary reflection wave is developed based on the source wave-generation method and source wave-dissipating method, and it used the VOF method to trace free surface. We compare numerical result with theoretical result of regular wave and irregular wave to check the accuracy of wave generation.The numerical wave flume is used to simulation the overtopping on slope dike under regular wave, and it included slope dike with parapet and no parapet slope dike. The wave motion characteristics in the process of overtopping is analyzed through decomposing a period of vector. We simulate some conditions in the literature and find that the trend is consistent through comparing with the result of numerical and physical simulation. It shows that the model is efficient and accurate on dealing with the overtopping and it has some applicability in the project.Then we research the overtopping on slope dike under irregular waves. The influence of relative height, gradient and relative depth on overtopping is analyzed through modeling. the trend is consistent through comparing with the result of numerical and physical simulation.