| 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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| Corresponding Author | Wang, Zhiying([email protected]) |
| Source Publication | OCEAN ENGINEERING
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| 2023-11-01 | |
| Volume | 287Pages:10 |
| ISSN | 0029-8018 |
| Abstract | 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)). |
| Keyword | Stratified flow Turbulent wakes Large-eddy simulation Surface signatures |
| DOI | 10.1016/j.oceaneng.2023.115818 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001082502700001 |
| WOS Keyword | DIRECT NUMERICAL-SIMULATION ; TURBULENT WAKE ; REYNOLDS-NUMBER ; LEVEL-SET |
| WOS Research Area | Engineering ; Oceanography |
| WOS Subject | Engineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography |
| Funding Project | 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] |
| Funding Organization | National Natural Science Foundation of China (NSFC) project ; NSFC project ; Basic Science Centre Program for Multiscale Problems in Nonlinear Mechanics |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Wang, Zhiying |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/93277 |
| Collection | 流固耦合系统力学重点实验室 |
| Recommended Citation 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.Rp_Au:Wang, Zhiying |
| 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. |
| MLA | Sun, Jun,et al."Characteristics of the surface signatures induced by a sphere in a linearly stratified flow".OCEAN ENGINEERING 287(2023):10. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2023Fa235.pdf（2774KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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