Long time evolution of large-scale patterns in a rectangular Rayleigh-Benard cell

被引：9
作者：
Sergent, A. [1 ]
Le Quere, P. [1 ]
机构：
[1] LIMSI, CNRS, F-91403 Orsay, France
来源：
13TH EUROPEAN TURBULENCE CONFERENCE (ETC13): CONVECTION, ROTATION, STRATIFICATION AND BUOYANCY EFFECTS | 2011年 / 318卷
关键词：
LARGE-EDDY SIMULATION; THERMAL-CONVECTION; DIFFUSIVITY MODEL; ASPECT RATIO; TURBULENT; NUMBER;
D O I：
10.1088/1742-6596/318/8/082010
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The time evolution of the network of quasi-stationary rolls is investigated for the case of a large aspect ratio rectangular Rayleigh-Benard cell (A = 5) by using large eddy simulations. For Rayleigh numbers between 10(7) and 10(10), sudden transitions without any external intervention have been observed in all studied cases between two mean flows which are stable on very long time period. During transition, a short reorientation of the rolls axis leads to a flow reversal and an increase in the size of the resulting rolls.
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页数：7
相关论文
共 16 条
[1]   Wind reversals in turbulent Rayleigh-Benard convection [J].
Araujo, FF ;
Grossmann, S ;
Lohse, D .
PHYSICAL REVIEW LETTERS, 2005, 95 (08)
[2]   Numerical simulations of flow reversal in Rayleigh-Benard convection [J].
Benzi, R. ;
Verzicco, R. .
EPL, 2008, 81 (06)
[3]   Reorientation of the large-scale circulation in turbulent Rayleigh-Benard convection [J].
Brown, E ;
Nikolaenko, A ;
Ahlers, G .
PHYSICAL REVIEW LETTERS, 2005, 95 (08)
[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]   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
[6]   Experimental study of temperature distribution and local heat flux for turbulent Rayleigh-Benard convection of air in a long rectangular enclosure [J].
Ebert, Anna ;
Resagk, Christian ;
Thess, Andre .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2008, 51 (17-18) :4238-4248
[7]  
Grtzbach G., 1983, SPATIAL RESOLUTION R, V49, P241
[8]   Transition to turbulent convection in a fluid layer heated from below at moderate aspect ratio [J].
Hartlep, T ;
Tilgner, A ;
Busse, FH .
JOURNAL OF FLUID MECHANICS, 2005, 544 :309-322
[9]   Dynamics of reorientations and reversals of large-scale flow in Rayleigh-Benard convection [J].
Mishra, P. K. ;
De, A. K. ;
Verma, M. K. ;
Eswaran, V. .
JOURNAL OF FLUID MECHANICS, 2011, 668 :480-499
[10]   Large eddy simulation of turbulent thermal convection using a mixed scale diffusivity model [J].
Sergent, A ;
Joubert, P ;
Le Quéré, P .
PROGRESS IN COMPUTATIONAL FLUID DYNAMICS, 2006, 6 (1-3) :40-49
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