Localized edge states nucleate turbulence in extended plane Couette cells

被引：84

作者：

Schneider, Tobias M. ^{[1
,2
]}

Marinc, Daniel ^{[1
,3
]}

Eckhardt, Bruno ^{[1
,4
]}

机构：

[1] Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany

[2] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[3] Rhein Westfal TH Aachen, Aerodynam Inst, D-52062 Aachen, Germany

[4] Delft Univ Technol, Dept Mech Engn, NL-2928 CA Delft, Netherlands

来源：

JOURNAL OF FLUID MECHANICS | 2010年 / 646卷

关键词：

PIPE-FLOW; TRANSITION; DYNAMICS; INTERMITTENCY; SYSTEMS; ONSET; SPOTS;

D O I：

10.1017/S0022112009993144

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We study the turbulence transition of plane Couette flow in large domains where localized perturbations are observed to generate growing turbulent spots. Extending previous studies on the boundary between laminar and turbulent dynamics we determine invariant structures intermediate between laminar and turbulent flow. In wide but short domains we find states that are localized in spanwise direction, and in wide and long domains the states are also localized in downstream direction. These localized states act as critical nuclei for the transition to turbulence in spatially extended domains.

引用

页码：441 / 451

页数：11

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