Late dynamics of large-scale vortices in periodic two-dimensional flows
文献类型：期刊论文
| 作者 | Cai J2,3,4; Fang L1,2
|
| 刊名 | PHYSICS LETTERS A
 |
| 出版日期 | 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 |
| WOS关键词 | 3 POINT VORTICES ; STATISTICAL-MECHANICS ; MOTION ; EVOLUTION ; STABILITY |
| 资助项目 | National Science Foundation in China[11772032] ; National Science Foundation in China[11572025] |
| 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. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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