| 波生沿岸流数值模拟 |
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| 引用本文： | 房克照,刘忠波,邹志利,孙家文,尹继伟.波生沿岸流数值模拟[J].水科学进展,2013,24(2):258-265. |
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| 作者姓名： | 房克照 刘忠波 邹志利 孙家文 尹继伟 |
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| 作者单位： | 1.大连理工大学海岸和近海工程国家重点实验室,辽宁大连 116024; |
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| 基金项目： | 国家自然科学基金资助项目，国家海洋局海域管理技术重点实验室资助项目 |
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| 摘 要： | 为了更好地研究近岸海域波生沿岸流,建立了基于高阶Boussinesq水波方程的波生沿岸流时域数值模型。控制方程在中等水深范围内具有较好的色散性和变浅作用性能,同时具有二阶完全非线性特征,适合描述近岸区域波浪强非线性运动。通过采用松弛造波方法实现了非线性波浪的无反射入射,采用周期性侧边界条件模拟开敞边界。通过数值试验,讨论了模型中主要参数对数值结果的影响。利用率定后的参数模拟了均匀坡度海岸上产生的沿岸流,通过和实验数据的对比验证了模型的准确性和适用性。利用模型数值模拟了不同波浪入射条件(包括周期、波高和波浪入射角度)对波生沿岸流的影响。
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| 关 键 词： | Boussinesq水波方程 数值模拟 波浪破碎 沿岸流 |
| 收稿时间： | 2012-05-28 |
Numerical simulation of longshore currents |
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| FANG Kezhao,LIU Zhongbo,ZOU Zhili,SUN Jiawen,YIN Jiwei.Numerical simulation of longshore currents[J].Advances in Water Science,2013,24(2):258-265. |
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| Authors: | FANG Kezhao LIU Zhongbo ZOU Zhili SUN Jiawen YIN Jiwei |
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| Affiliation: | 1.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2.National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian 116023, China |
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| Abstract: | To better understand the wave-induced longshore currents in nearshore region, a numerical model is developed based on the second order fully nonlinear Boussinesq equations.The governing equations possess optimum linear properties and second order fully nonlinearity characteristics in medium water depths.The relaxation zone method is used to generate non-reflective and higher-order nonlinear waves, and the periodic lateral boundary conditions are imposed to mimic open sea boundaries.Utilizing the developed model, the effect of involved parameter values on the numerical results are investigated by conducting numerical experiments.Good agreements between numerical results and experimental data demonstrate the accuracy and applicability of the model.The effects of different wave conditions on longshore currents are also investigated numerically. |
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| Keywords: | Boussinesq equations numerical simulation wave breaking longshore currents |
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