A multi-state description of roughness effects in turbulent pipe flow

doi:10.1088/1367-2630/14/9/093054

CORC > 北京大学 > 工学院

	A multi-state description of roughness effects in turbulent pipe flow
	She, Zhen-Su ; Wu, You ; Chen, Xi ; Hussain, Fazle
刊名	新物理学学报
	2012
关键词	SIMILARITY WALLS
DOI	10.1088/1367-2630/14/9/093054
英文摘要	Despite persistent efforts over the last century, a theory for predicting the effects of surface roughness on the mean flow is still missing. Here, we extend a recently proposed multi-state theory to incorporate roughness effects. A formula for the roughness function is constructed by applying the Lie-group invariance theory, giving excellent agreement with the fully collapsed data of both the Nikuradze sand-coated and Princeton honed pipes. A major advantage of the theory is its ability to successfully describe the non-universality-either inflectional or monotonic variations-in a transitionally rough regime with a single sharpness parameter. This model then yields an analytic prediction for the friction factor and mean velocity profiles in rough pipes, agreeing with the empirical data. Consistent with classical understanding (e.g. Townsend's similarity hypothesis), our results confirm the multi-layer theory of wall turbulence, regardless of smooth or rough surfaces.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000309393400012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Physics, Multidisciplinary; SCI(E); EI; 10; ARTICLE; 14
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/315941]
专题	工学院
推荐引用方式 GB/T 7714	She, Zhen-Su,Wu, You,Chen, Xi,et al. A multi-state description of roughness effects in turbulent pipe flow[J]. 新物理学学报,2012.
APA	She, Zhen-Su,Wu, You,Chen, Xi,&Hussain, Fazle.(2012).A multi-state description of roughness effects in turbulent pipe flow.新物理学学报.
MLA	She, Zhen-Su,et al."A multi-state description of roughness effects in turbulent pipe flow".新物理学学报 (2012).