| 内孤立波与海脊相互作用的模拟研究 |
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| 引用本文： | 李群,徐振华,尹宝树,白涛,刘昆,王洋.内孤立波与海脊相互作用的模拟研究[J].海洋学报(英文版),2015,34(11):32-37. |
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| 作者姓名： | 李群 徐振华 尹宝树 白涛 刘昆 王洋 |
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| 作者单位： | 中国极地研究中心, 上海 200136, 中国,中国科学院海洋研究所, 青岛 266071, 中国;中国科学院海洋环流与波动重点实验室, 青岛 266071, 中国,中国科学院海洋研究所, 青岛 266071, 中国;中国科学院海洋环流与波动重点实验室, 青岛 266071, 中国,国家海洋局北海预报中心, 青岛 266033, 中国,中国科学院海洋研究所, 青岛 266071, 中国;中国科学院海洋环流与波动重点实验室, 青岛 266071, 中国;中国科学院大学, 北京 100049, 中国,中国科学院海洋研究所, 青岛 266071, 中国;中国科学院海洋环流与波动重点实验室, 青岛 266071, 中国;中国科学院大学, 北京 100049, 中国 |
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| 基金项目： | The National Natural Science Foundation of China under contract Nos 41528601 and 41376029; the Youth Innovation Promotion Association of Chinese Academy of Sciences under contract No. Y4KY07103L, the Strategic Priority Research Program of the Chinese Academy of Sciences under contract No. XDA11020101. |
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| 摘 要： | A nonhydrostatic numerical model was developed and numerical experiments performed on the interaction of an internal solitary wave(ISW) with a sill, for a two-layer fluid with a diffusive interface. Based on the blocking parameter(Br), the flow was classified into three cases:(1) when bottom topography has little influence on the propagation and spatial structure of the ISW(Br0.5),(2) where the ISW is distorted significantly by the blocking effect of the topography(though no wave breaking occurs,(0.5Br0.7), and(3) where the ISW is broken as it encounters and passes over the bottom topography(0.7Br). The numerical results obtained here are consistent with those obtained in laboratory experiments. The breaking process of the incident ISW when Br≈0.7 was completely reproduced. Dissipation rate was linearly related to the blocking parameter when Br0.7, and the maximum dissipation rate could reach about 34% as Br raised to about 1.0. After that, instead of breaking, more reflection happened. Similarly, breaking induced mixing was also most effective during Br around 1.0, and can be up to 0.16.
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| 收稿时间： | 2015/3/19 0:00:00 |
| 修稿时间： | 2015/6/14 0:00:00 |
Modeling the interaction of an internal solitary wave with a sill |
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| LI Qun,XU Zhenhu,YIN Baoshu,BAI Tao,LIU Kun and WANG Yang.Modeling the interaction of an internal solitary wave with a sill[J].Acta Oceanologica Sinica,2015,34(11):32-37. |
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| Authors: | LI Qun XU Zhenhu YIN Baoshu BAI Tao LIU Kun and WANG Yang |
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| Institution: | Polar Research Institute of China, Shanghai 200136, China,Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves (KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China,Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves (KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China,North China Sea Marine Forecasting Center of State Oceanic Administration, Qingdao 266033, China,Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves (KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China and Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves (KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A nonhydrostatic numerical model was developed and numerical experiments performed on the interaction of an internal solitary wave (ISW) with a sill, for a two-layer fluid with a diffusive interface. Based on the blocking parameter (Br), the flow was classified into three cases: (1) when bottom topography has little influence on the propagation and spatial structure of the ISW (Br<0.5), (2) where the ISW is distorted significantly by the blocking effect of the topography (though no wave breaking occurs, (0.5< Br <0.7), and (3) where the ISW is broken as it encounters and passes over the bottom topography (0.7r). The numerical results obtained here are consistent with those obtained in laboratory experiments. The breaking process of the incident ISW when Br≈0.7 was completely reproduced. Dissipation rate was linearly related to the blocking parameter when Br<0.7, and the maximum dissipation rate could reach about 34% as Br raised to about 1.0. After that, instead of breaking, more reflection happened. Similarly, breaking induced mixing was also most effective during Br around 1.0, and can be up to 0.16. |
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| Keywords: | internal solitary wave nonhydrostatic model wave breaking blocking degree |
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