| Late dynamics of large-scale vortices in periodic two-dimensional flows | |
Cai J1,2,3; Fang L3,4
| |
| Corresponding Author | Fang, L.([email protected]) |
| Source Publication | PHYSICS LETTERS A
 |
| 2022-02-28 | |
| Volume | 426Pages:11 |
| ISSN | 0375-9601 |
| Abstract | 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. |
| Keyword | Homogeneous isotropic turbulence Two-dimensional turbulence Point vortex Direct numerical simulation |
| DOI | 10.1016/j.physleta.2021.127889 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000734135700002 |
| WOS Keyword | 3 POINT VORTICES ; STATISTICAL-MECHANICS ; MOTION ; EVOLUTION ; STABILITY |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| Funding Project | National Science Foundation in China[11772032] ; National Science Foundation in China[11572025] |
| Funding Organization | National Science Foundation in China |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Fang, L. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/88255 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Beihang Univ, Ecole Cent Pekin, Lab Complex Syst, Beijing 100191, Peoples R China; 4.Beihang Hangzhou Innovat Inst Yuhang, Hangzhou 310023, Peoples R China |
| Recommended Citation 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.Rp_Au:Fang, L. |
| 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. |
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| Jp2022FA511.pdf（2588KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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