Spatial properties of velocity structure functions in turbulent wake flows

被引:32
作者
Gaudin, E
Protas, B
Goujon-Durand, S
Wojciechowski, J
Wesfreid, JE
机构
[1] Ecole Super Phys & Chim Ind Ville Paris, Phys & Mecan Milieux Heterogenes Lab, CNRS, URA 857, F-75231 Paris 05, France
[2] Warsaw Univ Technol, Inst Aeronaut & Appl Mech, Dept Aerodynam, PL-00665 Warsaw, Poland
[3] Univ Paris 12, Fac Sci & Technol, F-94010 Creteil, France
来源
PHYSICAL REVIEW E | 1998年 / 57卷 / 01期
关键词
D O I
10.1103/PhysRevE.57.R9
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
In this paper we present experimental evidence that the scaling laws for the velocity structure functions S-n(r)=[[V(x+r)-V(x)](n)] n=2,4,6,8 hold in various parts of the flow domain. The exponents that characterize the scaling are, however, a function of the position in the wake that is the local strength and ubiquity of coherent structures. This variation is shown to be systematic and considerably exceeds the inaccuracy involved in the determination of the exponents. This is an objective indication of the influence that the organized how structures and inhomogeneity may have on intermittency. In the analysis we invoke the concept of the extended self-similarity (ESS).
引用
收藏
页码:R9 / R12
页数:4
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