Numerical studies on the degeneration of internal waves induced by an initial tilted pycnocline
文献类型：CNKI期刊论文
| 作者 | LIN Zhenhua; SONG Jinbao |
| 发表日期 | 2014-07-15 |
| 出处 | Acta Oceanologica Sinica
 |
| 关键词 | internal wave,numerical model,wave breaking,energy dissipation |
| 英文摘要 | The pycnocline in a closed domain is tilted by external wind forcing and tends to restore to a level position when the wind falls. An internal seiche oscillation exhibits if the forcing is weak, otherwise internal surge and internal solitary waves emerge, which serve as a link to cascade energy to small-scale processes. A two-dimensional non-hydrostatic code with a turbulence closure model is constructed to extend previous laboratory studies. The model could reproduce all the key phenomena observed in the corresponding laboratory experiments. The model results further serve as a comprehensive and reliable data set for an in-depth understanding of the related dynamical process. The comparative analyses indicate that nonlinear term favors the generation of internal surge and subsequent internal solitary waves, and the linear model predicts the general trend reasonably well. The vertical boundary can approximately reflect all the incoming waves, while the slope boundary serves as an area for small-scale internal wave breaking and energy dissipation. The temporal evolutions of domain integrated kinetic and potential energy are also analyzed, and the results indicate that about 20% of the initial available potential energy is lost during the first internal wave breaking process. Some numerical tactics such as grid topology and model initialization are also briefly discussed. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | The Fund for Creative Research Groups by the National Natural Science Foundation of China under contract No.41121064 ; the Strategic Priority Research Program of the Chinese Academy of Sciences under contract No.XDA11010104 ; the Open Fund of State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences under contract No.LTO1104 |
| 卷 | v.33期:07页:29-41 |
| 语种 | 英文; |
| 分类号 | P731.2 |
| ISSN号 | 0253-505X |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/190384]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.InstituteofOceanology,ChineseAcademyofSciences 2.KeyLaboratoryofOceanCirculationandWaves(KLOCAW),ChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | LIN Zhenhua,SONG Jinbao. Numerical studies on the degeneration of internal waves induced by an initial tilted pycnocline. 2014. |
入库方式： OAI收割
来源：海洋研究所
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