| Characteristics of the surface signatures induced by a sphere in a linearly stratified flow |
| Sun, Jun; Wang ZY(王志英); Chai J(柴锦); Wang Z(王展) ; Yang ZX(杨子轩)
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| 通讯作者 | Wang, Zhiying(wangzhiying@imech.ac.cn)
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| 发表期刊 | OCEAN ENGINEERING
 |
| 2023-11-01
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| 卷号 | 287页码:10 |
| ISSN | 0029-8018
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| 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)). |
| 关键词 | Stratified flow
Turbulent wakes
Large-eddy simulation
Surface signatures
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| DOI | 10.1016/j.oceaneng.2023.115818
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:001082502700001
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| 关键词[WOS] | DIRECT NUMERICAL-SIMULATION
; TURBULENT WAKE
; REYNOLDS-NUMBER
; LEVEL-SET
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| WOS研究方向 | Engineering
; Oceanography
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| WOS类目 | Engineering, Marine
; Engineering, Civil
; Engineering, Ocean
; Oceanography
|
| 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]
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| 项目资助者 | National Natural Science Foundation of China (NSFC) project
; NSFC project
; Basic Science Centre Program for Multiscale Problems in Nonlinear Mechanics
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| 论文分区 | 一类
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| 力学所作者排名 | 1
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| RpAuthor | Wang, Zhiying
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/93277
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| 专题 | 流固耦合系统力学重点实验室
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推荐引用方式
GB/T 7714 |
Sun, Jun,Wang ZY,Chai J,et al. Characteristics of the surface signatures induced by a sphere in a linearly stratified flow[J]. OCEAN ENGINEERING,2023,287:10.
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| APA |
Sun, Jun,王志英,柴锦,王展,&杨子轩.(2023).Characteristics of the surface signatures induced by a sphere in a linearly stratified flow.OCEAN ENGINEERING,287,10.
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| MLA |
Sun, Jun,et al."Characteristics of the surface signatures induced by a sphere in a linearly stratified flow".OCEAN ENGINEERING 287(2023):10.
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