Characteristics of the surface signatures induced by a sphere in a linearly stratified flow
文献类型:期刊论文
作者 | Sun, Jun; Wang, Zhiying2; Chai, Jin; Wang, Zhan; Yang, Zixuan; Wang Z(王展) |
刊名 | OCEAN ENGINEERING |
出版日期 | 2023-11-01 |
卷号 | 287页码:10 |
ISSN号 | 0029-8018 |
关键词 | Stratified flow Turbulent wakes Large-eddy simulation Surface signatures |
DOI | 10.1016/j.oceaneng.2023.115818 |
通讯作者 | Wang, Zhiying(wangzhiying@imech.ac.cn) |
英文摘要 | Internal waves generated by a moving body submerged in a stratified fluid typically yield modest surface signatures. Large-eddy simulation (LES) is employed to capture the surface signatures generated using a moving sphere in a linearly stratified fluid with various Froude numbers (Fr) and diving depths (D). For surface Kelvin wakes, with increasing Froude numbers (Fr), the wake angle (theta) decreases, the wavelength (L) and the maximum surface wave amplitude (A(max)) increases. Within the range of our simulation, the influence of diving depth (D) on wake angle (theta) and wavelength (L) is insignificant, while the maximum surface wave amplitude (A(max)) decreases as diving depth (D) increases. Additionally, surface turbulent signatures characterised by horizontal divergence (div(h)) are identified in the near wake. The results demonstrated the following: the horizontal divergence (div(h)) is transported upstream and downstream from internal wakes to the free surface, whereas the vertical vorticity (omega(y)) is only transported downstream. And the horizontal divergence (div(h)) can be transmitted for a larger distance than the vertical vorticity (omega(y)). |
WOS关键词 | DIRECT NUMERICAL-SIMULATION ; TURBULENT WAKE ; REYNOLDS-NUMBER ; LEVEL-SET |
资助项目 | National Natural Science Foundation of China (NSFC) project[11902323] ; NSFC project[12202453] ; NSFC project[12132018] ; NSFC project[11988102] ; Basic Science Centre Program for Multiscale Problems in Nonlinear Mechanics ; [11972038] |
WOS研究方向 | Engineering ; Oceanography |
语种 | 英语 |
WOS记录号 | WOS:001082502700001 |
资助机构 | National Natural Science Foundation of China (NSFC) project ; NSFC project ; Basic Science Centre Program for Multiscale Problems in Nonlinear Mechanics |
源URL | [http://dspace.imech.ac.cn/handle/311007/93276] |
专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
通讯作者 | Wang, Zhiying |
作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, Jun,Wang, Zhiying,Chai, Jin,et al. Characteristics of the surface signatures induced by a sphere in a linearly stratified flow[J]. OCEAN ENGINEERING,2023,287:10. |
APA | Sun, Jun,Wang, Zhiying,Chai, Jin,Wang, Zhan,Yang, Zixuan,&王展.(2023).Characteristics of the surface signatures induced by a sphere in a linearly stratified flow.OCEAN ENGINEERING,287,10. |
MLA | Sun, Jun,et al."Characteristics of the surface signatures induced by a sphere in a linearly stratified flow".OCEAN ENGINEERING 287(2023):10. |
入库方式: OAI收割
来源:力学研究所
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