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学科主题: Engineering, Multidisciplinary ; Engineering, Mechanical ; Mechanics
题名: ENERGY BUDGET OF INTERNAL SOLITARY WAVES IN SOUTH CHINA SEA FROM CONTINUOUSLY STRATIFIED NONHYDROSTATIC MODEL
作者: [Chen, Zhi-Wu ; Xie, Jieshuo ; Xu, Jiexin ; Cai, Shuqun] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Xie, Jieshuo ; Xu, Jiexin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
通讯作者: caisq@scsio.ac.cn
关键词: internal solitary waves ; baroclinic energy ; energy flux ; energy conversion ; dissipation
刊名: ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
发表日期: 2013
卷: 7, 期:3, 页:295-307
部门归属: LTO
资助者: This work was jointly supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (No. SQ201107), National Basic Research Program (Nos. 2011CB013701 and 2013CB956101), Guangdong Natural Science Foundation (No. S2012040008082) and NSFC Grant No. 41025019.
摘要: An in-house fully nonlinear, nonhydrostatic numerical code is utilized for simulations of internal solitary waves (ISWs) generated by tidal flow over a Gaussian sill topography. A complete, rigorous theoretical framework is then adopted for the energetics analysis of these ISWs. It is found that ISWs contain most of the baroclinic energy in the internal wave field. The nonhydrostatic energy flux is in opposite direction to the hydrostatic and nonlinear fluxes. For fixed tidal excursion parameter (epsilon), the nonlinear portion of the total baroclinic flux decreases as the slope parameter (gamma) increases. In addition, the ISW energy, energy flux and barotropic-to-baroclinic energy conversion rate all peak when the bottom topography is critical (gamma = 1). For typical ISWs generated in the Luzon Strait, 87.9% of the total barotropic input energy is converted into baroclinic energy, and the other part of the energy is used for barotropic dissipation. 63.7% of the converted baroclinic energy is radiated far away and the remaining part of the baroclinic energy is dissipated through local mixing. When compared to the energy budget of linear internal tides, the percentages of the energy that are converted and radiated decrease, or equivalently, the percentages of the energy that are used for barotropic and baroclinic dissipations increase. Thus, the emergence of ISWs can effectively enhance both barotropic and baroclinic dissipations.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000323105300001
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10890
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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[Chen, Zhi-Wu; Xie, Jieshuo; Xu, Jiexin; Cai, Shuqun] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Xie, Jieshuo; Xu, Jiexin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.ENERGY BUDGET OF INTERNAL SOLITARY WAVES IN SOUTH CHINA SEA FROM CONTINUOUSLY STRATIFIED NONHYDROSTATIC MODEL,ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS,2013,7(3):295-307
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文件名: ENERGY BUDGET OF INTERNAL SOLITARY WAVES IN SOUTH CHINA SEA FROM CONTINUOUSLY STRATIFIED NONHYDROSTATIC MODEL.pdf
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