Strain self-amplification is larger than vortex stretching due to an invariant relation of filtered velocity gradients

doi:10.1017/jfm.2022.1072

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	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)
刊名	JOURNAL OF FLUID MECHANICS
	2023-01-25
卷号	955 页码:14
关键词	homogeneous turbulence turbulence theory
ISSN号	0022-1120
DOI	10.1017/jfm.2022.1072
通讯作者	He, G. W.(hgw@lnm.imech.ac.cn)
英文摘要	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.
分类号	一类/力学重要期刊
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]
WOS关键词	LOCAL ENERGY FLUX ; REYNOLDS-NUMBER ; TURBULENT ; GEOMETRY ; TENSOR ; VORTICITY ; DYNAMICS ; MODELS
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001091249400001
资助机构	Natural Science Foundation of China (NSFC) Basic Science Center Program for 'Multiscale Problems in Nonlinear Mechanics' ; NSFC
其他责任者	He, G. W.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93346]
专题	力学研究所_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.
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.