Late dynamics of large-scale vortices in periodic two-dimensional flows

doi:10.1016/j.physleta.2021.127889

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Late dynamics of large-scale vortices in periodic two-dimensional flows
	Cai J 2,3,4; Fang L 1,2
刊名	PHYSICS LETTERS A
	2022-02-28
卷号	426 页码:11
关键词	Homogeneous isotropic turbulence Two-dimensional turbulence Point vortex Direct numerical simulation
ISSN号	0375-9601
DOI	10.1016/j.physleta.2021.127889
通讯作者	Fang, L.(le.fang@zoho.com)
英文摘要	The inverse cascade in freely decaying two-dimensional flows with periodic boundary conditions will lead to a quasi-steady long-term system of vortices, which has not been well investigated in literature. By performing a series of direct numerical simulations, we focus on the late dynamics of these large-scale vortices. It is found that the theories of point vortices can be also approximately employed for both quadrate and hexagonal periodic conditions, however, in real flows the dynamics can switch among different motions, which differs from the theory of point vortices. It is observed as a special case of the wandering motions that the weakest vortex can migrate among different periods, with the other two vortices co-rotating. This phenomenon can be analogical to the physics of current flow. In addition, the merging procedure of large-scale vortices can be described by using the skewness of vorticity. (C) 2021 Elsevier B.V. All rights reserved.
分类号	二类
资助项目	National Science Foundation in China[11772032] ; National Science Foundation in China[11572025]
WOS关键词	3 POINT VORTICES ; STATISTICAL-MECHANICS ; MOTION ; EVOLUTION ; STABILITY
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000734135700002
资助机构	National Science Foundation in China
其他责任者	Fang, L.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88254]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Beihang Hangzhou Innovat Inst Yuhang, Hangzhou 310023, Peoples R China 2.Beihang Univ, Ecole Cent Pekin, Lab Complex Syst, Beijing 100191, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Cai J,Fang L. Late dynamics of large-scale vortices in periodic two-dimensional flows[J]. PHYSICS LETTERS A,2022,426:11.
APA	Cai J,&Fang L.(2022).Late dynamics of large-scale vortices in periodic two-dimensional flows.PHYSICS LETTERS A,426,11.
MLA	Cai J,et al."Late dynamics of large-scale vortices in periodic two-dimensional flows".PHYSICS LETTERS A 426(2022):11.