| 基于格子Boltzmann方法的斜坡堤越浪数值模拟研究 |
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| 引用本文： | 李薪丰,张庆河,张金凤,刘光威.基于格子Boltzmann方法的斜坡堤越浪数值模拟研究[J].海洋工程,2020,38(3):22-30. |
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| 作者姓名： | 李薪丰 张庆河 张金凤 刘光威 |
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| 作者单位： | 天津大学 水利工程仿真与安全国家重点实验室, 天津 300350;天津大学 水利工程仿真与安全国家重点实验室, 天津 300350;清华大学 水沙科学与水利水电工程国家重点实验室, 北京 100084 |
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| 基金项目： | 国家重点研发计划项目（2017YFC1404200）；广东省水利科技创新项目（2017-17）；天津市交通运输科技发展计划项目（2020-12） |
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| 摘 要： | 准确确定越浪量对于斜坡堤设计有重要意义。利用格子Boltzmann方法(LBM),并采用主动吸收式速度入口造波、出流边界消波、VOF方法追踪自由表面以及静态Smagorinsky模型模拟紊流运动,建立二维数值波浪水槽,对光滑斜坡堤上规则波与不规则波越浪进行数值模拟。模拟结果与试验值及其他数值模型结果比较表明,二维LBM数值波浪水槽具有模拟斜坡堤越浪的能力,但对于破碎较为剧烈的越浪过程模拟,该模型还存在一定的不足,未来可从提高自由表面模型精度等方面进一步改善其性能。
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| 关 键 词： | 格子Boltzmann方法 斜坡堤 越浪 数值波浪水槽 波浪破碎 不规则波 |
| 收稿时间： | 2019/7/19 0:00:00 |
Numerical simulation of wave overtopping over the sloping seawall based on the lattice Boltzmann method |
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| LI Xinfeng,ZHANG Qinghe,ZHANG Jinfeng,LIU Guangwei.Numerical simulation of wave overtopping over the sloping seawall based on the lattice Boltzmann method[J].Ocean Engineering,2020,38(3):22-30. |
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| Authors: | LI Xinfeng ZHANG Qinghe ZHANG Jinfeng LIU Guangwei |
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| Institution: | State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China; State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China;State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | It is one of important factors of the accurate determination of the overtopping discharges for the design of sloping seawall. Based on the lattice Boltzmann method, a two-dimensional numerical wave flume was developed using the wave-maker with active absorption velocity at inlet, the wave eliminating method at outflow boundary, the volume of fluid algorithm to track the free surface and the static Smagorinsky model to simulate turbulence. The numerical wave flume was applied to simulate the wave overtopping over smooth sloping seawall due to regular and irregular waves. Comparisons among the simulation results, the experimental data and other numerical model results show that the numerical wave flume using the two-dimensional LBM has the ability to simulate wave overtopping of sloping seawall, though some deficiencies exit in the simulation of the wave-breaking process. In the future, the performance of the model can be improved through methods such as improving the accuracy of the free surface model. |
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| Keywords: | lattice Boltzmann method sloping seawall wave overtopping numerical wave tank wave breaking irregular wave |
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