Reynolds number dependence of the inertial range scaling of energy   dissipation rate and enstrophy in a cylinder wake

doi:10.1007/s00348-007-0400-5

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	Reynolds number dependence of the inertial range scaling of energy dissipation rate and enstrophy in a cylinder wake
	Hao, Z. ; Zhou, T. ; Zhou, Y. ; Mi, J.
刊名	流体力学实验
	2008
关键词	TRANSVERSE STRUCTURE FUNCTIONS FULLY-DEVELOPED TURBULENCE ORDER STRUCTURE FUNCTIONS ISOTROPIC TURBULENCE VELOCITY INCREMENTS INITIAL CONDITIONS GRID TURBULENCE HYPOTHESES EXPONENTS VORTICITY
DOI	10.1007/s00348-007-0400-5
英文摘要	The full energy dissipation rate and enstrophy are measured simultaneously using a probe consisting of four X-wires in the intermediate region of a cylinder wake for Taylor microscale Reynolds number in the range of 120-320. Longitudinal and transverse velocity increments are also obtained temporally using Taylor's hypothesis. The inertial range scaling exponents indicate that the full enstrophy field has a stronger intermittency than does the full dissipation field for all the Reynolds numbers considered. The approximations of the energy dissipation rate and enstrophy based on isotropy are more intermittent than their corresponding true values. While the scaling exponents of the full energy dissipation rate remain approximately constant for different Reynolds numbers, those of the enstrophy decrease slightly and consistently with the increase of Reynolds number. It is conjectured that the scaling of the energy dissipation rate and the enstrophy may be the same when Reynolds number is extremely high, a trend that is consistent with that suggested by Nelkin (Phys Fluids 11:2202-2204, 1999; Am J Phys 68:310-318, 2000).; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000252474600009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Mechanical; Mechanics; SCI(E); EI; 4; ARTICLE; 2; 279-289; 44
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/249544]
专题	工学院
推荐引用方式 GB/T 7714	Hao, Z.,Zhou, T.,Zhou, Y.,et al. Reynolds number dependence of the inertial range scaling of energy dissipation rate and enstrophy in a cylinder wake[J]. 流体力学实验,2008.
APA	Hao, Z.,Zhou, T.,Zhou, Y.,&Mi, J..(2008).Reynolds number dependence of the inertial range scaling of energy dissipation rate and enstrophy in a cylinder wake.流体力学实验.
MLA	Hao, Z.,et al."Reynolds number dependence of the inertial range scaling of energy dissipation rate and enstrophy in a cylinder wake".流体力学实验 (2008).