Coherent Oscillations of Turbulent Rayleigh-Benard Convection in a Thin Vertical Disk

被引：18

作者：

Song, Hao ^{[1
]}

Villermaux, E. ^{[2
]}

Tong, Penger ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

[2] Univ Provence, IRPHE, F-13384 Marseille 13, France

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 18期

关键词：

THERMAL-CONVECTION;

D O I：

10.1103/PhysRevLett.106.184504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A well-defined oscillation is observed in the power spectrum of several fluctuating signals in turbulent Rayleigh-Benard convection occurring in a thin vertical disk filled with water. The experiment reveals that the coherent oscillations are produced by periodic emission of thermal plumes, which gives rise to periodic pulses of forcing, resulting in a pulsed large-scale circulation in the thin cell. The experimental results agree well with the theoretical predictions made from two coupled nonlinear delayed equations.

引用

页数：4

共 23 条

[1] Heat transfer and large scale dynamics in turbulent Rayleigh-Benard convection [J].

Ahlers, Guenter ;

Grossmann, Siegfried ;

Lohse, Detlef .

REVIEWS OF MODERN PHYSICS, 2009, 81 (02) :503-537

[2] Wind reversals in turbulent Rayleigh-Benard convection [J].

Araujo, FF ;

Grossmann, S ;

Lohse, D .

PHYSICAL REVIEW LETTERS, 2005, 95 (08)

[3] The origin of oscillations of the large-scale circulation of turbulent Rayleigh-Benard convection [J].

Brown, Eric ;

Ahlers, Guenter .

JOURNAL OF FLUID MECHANICS, 2009, 638 :383-400

[4] A model of diffusion in a potential well for the dynamics of the large-scale circulation in turbulent Rayleigh-Benard convection [J].

Brown, Eric ;

Ahlers, Guenter .

PHYSICS OF FLUIDS, 2008, 20 (07)

[5] SCALING OF HARD THERMAL TURBULENCE IN RAYLEIGH-BENARD CONVECTION [J].

CASTAING, B ;

GUNARATNE, G ;

HESLOT, F ;

KADANOFF, L ;

LIBCHABER, A ;

THOMAE, S ;

WU, XZ ;

ZALESKI, S ;

ZANETTI, G .

JOURNAL OF FLUID MECHANICS, 1989, 204 :1-30

[6] Strongly turbulent Rayleigh-Benard convection in mercury: Comparison with results at moderate Prandtl number [J].

Cioni, S ;

Ciliberto, S ;

Sommeria, J .

JOURNAL OF FLUID MECHANICS, 1997, 335 :111-140

[7]

du Puits R., UNPUB

[8] Breakdown of wind in turbulent thermal convection [J].

du Puits, Ronald ;

Resagk, Christian ;

Thess, Andre .

PHYSICAL REVIEW E, 2007, 75 (01)

[9] Plume motion and large-scale circulation in a cylindrical Rayleigh-Benard cell [J].

Funfschilling, D ;

Ahlers, G .

PHYSICAL REVIEW LETTERS, 2004, 92 (19) :194502-1

[10]

Howard L.N., 1966, PROC 11 C APPL MECH, P1109

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