Probability Distribution Function of Near-Wall Turbulent Velocity Fluctuations

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	Probability Distribution Function of Near-Wall Turbulent Velocity Fluctuations
	Zhou JF(周济福); Zhang Q(张强); Li JC(李家春)
刊名	Applied Mathematics and Mechanics (English Edition)
	2005
通讯作者邮箱	zhoujf@imech.ac.cn
卷号	26 期号:10 页码:1245-1254
ISSN号	0253-4827
通讯作者	Zhou, JF (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
中文摘要	By large eddy simulation (LES), turbulent databases of channel flows at different Reynolds numbers were established. Then, the probability distribution functions of the streamwise and wall-normal velocity fluctuations were obtained and compared with the corresponding normal distributions. By hypothesis test, the deviation from the normal distribution was analyzed quantitatively. The skewness and flatness factors were also calculated. And the variations of these two factors in the viscous sub-layer, buffer layer and log-law layer were discussed. Still illustrated were the relations between the probability distribution functions and the burst events-sweep of high-speed fluids and ejection of low-speed fluids-in the viscous sub-layer, buffer layer and log-law layer. Finally the variations of the probability distribution functions with Reynolds number were examined.
学科主题	力学
类目[WOS]	Mathematics, Applied ; Mechanics
研究领域[WOS]	Mathematics ; Mechanics
关键词[WOS]	CHANNEL FLOW ; SEDIMENT TRANSPORT
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000232934000001
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/15386]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Zhou JF,Zhang Q,Li JC. Probability Distribution Function of Near-Wall Turbulent Velocity Fluctuations[J]. Applied Mathematics and Mechanics (English Edition),2005,26(10):1245-1254.
APA	周济福,张强,&李家春.(2005).Probability Distribution Function of Near-Wall Turbulent Velocity Fluctuations.Applied Mathematics and Mechanics (English Edition),26(10),1245-1254.
MLA	周济福,et al."Probability Distribution Function of Near-Wall Turbulent Velocity Fluctuations".Applied Mathematics and Mechanics (English Edition) 26.10(2005):1245-1254.