Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows

doi:10.1017/jfm.2023.39

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	Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows
	Wu T(吴霆); He GW(何国威)
发表期刊	JOURNAL OF FLUID MECHANICS
	2023-02-07
卷号	956 页码:A31
ISSN	0022-1120
摘要	Composite sweeping enhanced resolvents, referred to as the R s(2) model, are proposed to predict the space time statistics of large scale structures in turbulent channel flows. This model incorporates two key mechanisms: (i) eddy damping is introduced to represent random sweeping decorrelation caused by nonlinear forcing, leading to a sweeping enhanced resolvent R s; and (ii) the sweeping enhanced resolvent R s is composited into its iterations R s(2) to yield non zero Taylor time microscales. The resulting R s(2) model can correctly predict the frequency spectra and two point cross spectra of large scale structures. This model is compared numerically with eddy viscosity enhanced resolvent models. The latter are designed to represent energy transfer instead for time decorrelation, and thus underpredict the characteristic decay time scales. The R s(2) model correctly yields the characteristic decay time scales in turbulent channel flows.
关键词	turbulence modelling turbulent boundary layers
DOI	10.1017/jfm.2023.39
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000927887700001
WOS研究方向	Mechanics ; Physics, Fluids & Plasmas
WOS类目	Mechanics ; Physics
项目资助者	NSFC Basic Science Center Program for Multiscale Problems inNonlinear Mechanics' [11988102] ; National Natural Science Foundation of China [12002344, 11232011, 11572331] ; China PostdoctoralScience Foundation [2020M670478] ; Strategic Priority Research Program [XDB22040104]
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	He, GW (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; He, GW (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91811
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu T,He GW. Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows[J]. JOURNAL OF FLUID MECHANICS,2023,956:A31.Rp_Au:He, GW (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China., He, GW (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
APA	吴霆,&何国威.(2023).Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows.JOURNAL OF FLUID MECHANICS,956,A31.
MLA	吴霆,et al."Composition of resolvents enhanced by random sweeping for large scale structures in turbulent channel flows".JOURNAL OF FLUID MECHANICS 956(2023):A31.

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