Edge State in Pipe Flow Experiments

被引：54

作者：

de Lozar, A. ^{[1
,2
]}

Mellibovsky, F. ^{[3
]}

Avila, M. ^{[1
,4
]}

Hof, B. ^{[1
]}

机构：

[1] Max Planck Inst Dynam & Self Org, D-37073 Gottingen, Germany

[2] Max Planck Inst Meteorol, D-20146 Hamburg, Germany

[3] Univ Politecn Cataluna, ES-08034 Barcelona, Spain

[4] Univ Erlangen Nurnberg, Inst Fluid Mech, D-91058 Erlangen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 21期

关键词：

TRAVELING-WAVES; TURBULENCE; TRANSITION; DYNAMICS;

D O I：

10.1103/PhysRevLett.108.214502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent numerical studies suggest that in pipe and related shear flows, the region of phase space separating laminar from turbulent motion is organized by a chaotic attractor, called an edge state, which mediates the transition process. We here confirm the existence of the edge state in laboratory experiments. We observe that it governs the dynamics during the decay of turbulence underlining its potential relevance for turbulence control. In addition we unveil two unstable traveling wave solutions underlying the experimental flow fields. This observation corroborates earlier suggestions that unstable solutions organize turbulence and its stability border.

引用

页数：5

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