基于OpenFOAM的挡板透空式防波堤水动力特性数值分析

基于有限体积法理论,应用开源计算流体力学软件OpenFOAM求解黏性不可压缩流体的连续性方程和动量方程,建立了二维数值波浪水槽,并通过规则波作用下挡板式透空结构的物理模型试验数据(波面、压力和流速)对数值波浪水槽进行了验证;计算并比较分析了不同入射波浪条件下挡板相对入水深度对透射系数和挡板底部流速的影响。结果表明,当挡板相对入水深度大于0.8时,透射系数可降低至0.5以下;随着挡板相对入水深度的增加,底部水体往复流动的速度也明显增大,这需要引起工程技术人员的额外关注。

Numerical simulation on hydrodynamic performance of baffle type breakwater based on OpenFOAM

A two-dimensional numerical wave flume model was set up using the open source CFD software OpenFOAM to solve the continuity and momentum equations for viscous incompressible fluid based on fluid finite volume method. The numerical wave flume was verified by the experimental data of wave elevations, pressures and the bottom velocity from the physical model test of a baffle structure under regular waves. The transmission coefficients and the bottom velocity of the battle structure in different incident wave conditions were computed and compared alone with the relative depth. It shows that the transmission coefficients can be less than 0. 5 if the relative depth is greater than 0. 8. The bottom velocity of the oscillating flow can obviously be enhanced with the increase of the relative depth and extra attention should be focused on by engineering technicians.