Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis

doi:10.1063/1.4908070

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	Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis
	Geng, CH; He GW(何国威); Wang, YS; Xu, CX; Lozano-Duran, A; Wallace, JM; Geng, CH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
发表期刊	PHYSICS OF FLUIDS
	2015-02
卷号	27 期号:2 页码:25111
ISSN	1070-6631
摘要	Direct numerical simulations of turbulent channel flow at Re-tau = 205 and 932 have been carried out to examine Taylor's "frozen turbulence" hypothesis. The terms in Taylor's hypothesis appear in the transport equation for instantaneous momentum (Navier-Stokes) in this flow. The additional terms, i.e., the additional convective acceleration term and the pressure gradient and viscous force terms, act to diminish the validity of Taylor's hypothesis when they are relatively large compared to the Taylor's hypothesis terms and are not in balance. A similar analysis has been applied to the transport equation for instantaneous vorticity. The additional terms in this equation, namely, the additional convective rates of change of vorticity terms, the stretching/compression/rotation of vorticity terms, and the viscous diffusion of vorticity terms, similarly act to diminish the validity of Taylor's hypothesis when they are relatively large compared to the terms in the hypothesis and are not in balance. Where in the channel flow this diminishment occurs, and to what degree, and which of the non-Taylor's hypothesis terms in the momentum and vorticity equations contribute most to this diminishment are unraveled here. (C) 2015 AIP Publishing LLC.
学科领域	Mechanics ; Physics, Fluids & Plasmas
DOI	10.1063/1.4908070
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000350551300037
关键词[WOS]	NAVIER-STOKES EQUATIONS ; CONVECTION VELOCITIES ; ISOTROPIC TURBULENCE ; REYNOLDS-NUMBER ; SHEAR FLOWS ; WALL FLOWS ; STATISTICS ; APPROXIMATION ; APPLICABILITY ; ACCELERATIONS
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
项目资助者	Institute of Mechanics of the Chinese Academy of Science ; Burgers Program for Fluid Dynamics of the University of Maryland ; National Natural Science Foundation of China [11232011, 11021262] ; National Basic Research Program of China (973 Program) [2013CB834100]
课题组名称	LNM湍流
论文分区	一类/力学重要期刊
引用统计	被引频次：57[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/311007/49912
专题	非线性力学国家重点实验室
通讯作者	Geng, CH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Geng, CH,He GW,Wang, YS,et al. Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis[J]. PHYSICS OF FLUIDS,2015,27,2,:25111.
APA	Geng, CH.,何国威.,Wang, YS.,Xu, CX.,Lozano-Duran, A.,...&Geng, CH .(2015).Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis.PHYSICS OF FLUIDS,27(2),25111.
MLA	Geng, CH,et al."Taylor's hypothesis in turbulent channel flow considered using a transport equation analysis".PHYSICS OF FLUIDS 27.2(2015):25111.

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