| Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients |
| Yang PF(杨鹏飞) ; Zhou ZD(周志登); Xu H; He GW(何国威)
|
| 通讯作者 | He, G. W.(hgw@lnm.imech.ac.cn)
|
| 发表期刊 | JOURNAL OF FLUID MECHANICS
 |
| 2023-01-25
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| 卷号 | 955页码:14 |
| ISSN | 0022-1120
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| 摘要 | A relation among invariants of filtered velocity gradients with two different filter sizes is derived. Based on this relation and physical reasoning, it is shown analytically that strain self-amplification contributes more to energy transfer than vortex stretching in homogeneous turbulence, as observed in recent numerical investigations of homogeneous isotropic turbulence. We note that the invariant relation studied and hence the inequality between strain self-amplification and vortex stretching apply to all homogeneous flows, not restricted to isotropic turbulence. |
| 关键词 | homogeneous turbulence
turbulence theory
|
| DOI | 10.1017/jfm.2022.1072
|
| 收录类别 | SCI
; EI
|
| 语种 | 英语
|
| WOS记录号 | WOS:001091249400001
|
| 关键词[WOS] | LOCAL ENERGY FLUX
; REYNOLDS-NUMBER
; TURBULENT
; GEOMETRY
; TENSOR
; VORTICITY
; DYNAMICS
; MODELS
|
| WOS研究方向 | Mechanics
; Physics
|
| WOS类目 | Mechanics
; Physics, Fluids & Plasmas
|
| 资助项目 | Natural Science Foundation of China (NSFC) Basic Science Center Program for 'Multiscale Problems in Nonlinear Mechanics'[11988102]
; NSFC[91852104]
; NSFC[12202452]
|
| 项目资助者 | Natural Science Foundation of China (NSFC) Basic Science Center Program for 'Multiscale Problems in Nonlinear Mechanics'
; NSFC
|
| 论文分区 | 一类/力学重要期刊
|
| 力学所作者排名 | 1
|
| RpAuthor | He, G. W.
|
| 引用统计 |
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| 文献类型 | 期刊论文
|
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/93347
|
| 专题 | 非线性力学国家重点实验室
|
推荐引用方式
GB/T 7714 |
Yang PF,Zhou ZD,Xu H,et al. Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients[J]. JOURNAL OF FLUID MECHANICS,2023,955:14.
|
| APA |
杨鹏飞,周志登,Xu H,&何国威.(2023).Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients.JOURNAL OF FLUID MECHANICS,955,14.
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| MLA |
杨鹏飞,et al."Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients".JOURNAL OF FLUID MECHANICS 955(2023):14.
|
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