Characteristics of the surface signatures induced by a sphere in a linearly stratified flow

doi:10.1016/j.oceaneng.2023.115818

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Characteristics of the surface signatures induced by a sphere in a linearly stratified flow
	Sun, Jun ; Wang, Zhiying 2; Chai, Jin ; Wang, Zhan ; Yang, Zixuan
刊名	OCEAN ENGINEERING
	2023-11-01
卷号	287 页码:10
关键词	Stratified flow Turbulent wakes Large-eddy simulation Surface signatures
ISSN号	0029-8018
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)).
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关键词	DIRECT NUMERICAL-SIMULATION ; TURBULENT WAKE ; REYNOLDS-NUMBER ; LEVEL-SET
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
内容类型	期刊论文
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.(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.