Size-dependent transient nature of localized turbulence in transitional channel flow
文献类型：期刊论文
| 作者 | Xu, Duo2,3 ; Song, Baofang1; Xu D(徐多)
|
| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2022-10-26 |
| 卷号 | 950页码:13 |
| ISSN号 | 0022-1120 |
| 关键词 | transition to turbulence intermittency shear-flow instability |
| DOI | 10.1017/jfm.2022.839 |
| 通讯作者 | Song, Baofang(baofang_song@tju.edu.cn) |
| 英文摘要 | It has been reported that a fully localized turbulent band in channel flow becomes sustained when the Reynolds number is above a threshold. Here we show evidence that turbulent bands are of a transient nature instead. When the band length is controlled to be fixed, the lifetime of turbulent bands appears to be stochastic and exponentially distributed, a sign of a memoryless transient nature. Besides increasing with the Reynolds number, the mean lifetime also strongly increases with the band length. Given that the band length always changes over time in real channel flow, this size dependence may translate into a time dependence, which needs to be taken into account when clarifying the relationship between channel flow transition and the directed percolation universality class. |
| WOS关键词 | PIPE |
| 资助项目 | National Natural Science Foundation of China[11988102] ; National Natural Science Foundation of China[91852105] ; National Natural Science Foundation of China[91752113] ; National Natural Science Foundation of China[92152106] ; Tianjin University[2018XRX-0027] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000874315400001 |
| 资助机构 | National Natural Science Foundation of China ; Tianjin University |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/90639]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Song, Baofang |
| 作者单位 | 1.Tianjin Univ, Ctr Appl Math, Tianjin 300072, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Duo,Song, Baofang,Xu D. Size-dependent transient nature of localized turbulence in transitional channel flow[J]. JOURNAL OF FLUID MECHANICS,2022,950:13. |
| APA | Xu, Duo,Song, Baofang,&徐多.(2022).Size-dependent transient nature of localized turbulence in transitional channel flow.JOURNAL OF FLUID MECHANICS,950,13. |
| MLA | Xu, Duo,et al."Size-dependent transient nature of localized turbulence in transitional channel flow".JOURNAL OF FLUID MECHANICS 950(2022):13. |
入库方式： OAI收割
来源：力学研究所
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