摘要
利用水深平均的K—ε紊流模型模拟波浪在斜坡上的爬落,离散格式选用Lax—wendroff格式,直观的予测—修正—光滑过程用于处理移动边界问题。对崩波、破碎立波、激波的计算,表明模拟所得的紊动粘性系数分布,定性上反映了客观规律,对爬高、落深值的计算取得了与实验吻合的结果。在对波浪爬落速度分析时,发现了一些不同于以往实验研究的结果。
In this paper, the Depth Averaged K-e Turbulence model is developed to simulate wave run-up and run-dorwn on beaches. The finite-amplitude-shallow-water equation including the effects of bottom friction and turbulent dissipation is solved numerically by means of an explicit lax-wendroff finite-difference method Predictor-corrector-smoothing procedure is introduced to monitor the location of the moving water front. The distribution of turbulent viscosity coefficient γt resulting from the K-E model in the calculation of different breakers (spilling, collapsing surging) reflects the natural processes qualitatively. The calculation has a good agreement with the experimental result in the case of the run-up and rundown value. Comparing with the previous studies author has found somewhat different conclusions in run-up and run-down speed.
出处
《港工技术》
北大核心
1998年第4期1-8,共8页
Port Engineering Technology
关键词
爬落
K-Ε紊流模型
模拟波浪
斜坡
Numerical Simulation, Wave Run-up and Run-Down K-ε Thrbulence Model
