栅栏板护面斜坡堤越浪数值模拟研究

Numerical simulation of overtopping on sloping dike with fence panels

基于计算流体力学开源软件Open FOAM,利用数值波浪水槽建立了斜坡堤越浪模拟模型。模拟了规则波作用下光滑坡面斜坡堤的越浪过程,并将越浪量计算结果与已有的断面实验数据进行了比较,两者较为吻合,从而验证了模型的合理性。进一步针对规则波作用下栅栏板护面斜坡堤越浪过程进行模拟,通过网格细分,刻画出了栅栏板凹槽的形状,比较了斜坡堤在铺设栅栏板斜坡堤的情况下和光滑堤面情况下的波浪爬坡示意图,结果表明栅栏板对波浪爬坡有阻碍作用。计算得到栅栏板凹槽内的流场图和波浪爬坡过程中的湍动能耗散图,讨论了栅栏板的消能过程。比较了无栅栏板和有栅栏板情况下的越浪量,结果表明栅栏板护面对斜坡堤越浪量的折减系数约为0.81。

Based on the open source software OpenFOAM, we established a numerical model of overtopping using the numerical wave tank, simulated the overtopping on a smooth slope dike under regular waves. The results are compared with physical model experiment data, proved that the results are in good agreement with the experimental data, which verifies the reasonably of numerical model. We further simulated the overtopping on a sloping dike with fence panels under regular waves, described the grooves of fence panels by subdividing the mesh in them, compared the sketches of wave run up under the slope dike and smooth dike with fence panels, the result shows that fence panels can hinder wave running up. Sketches of velocity fields in the groove and the turbulent dissipation rate distribution are showed in the article. The energy dissipation process of fence panels is also discussed. By comparing the overtopping discharges on slopes with and without fence panels, we obtained that the overtopping discharge friction of fence panels is 0.81.