Heat transport in turbulent Rayleigh-Benard convection for Pr ≃ 0.8 and Ra ≲ 1015

被引：9

作者：

Ahlers, Guenter ^{[1
]}

Funfschilling, Denis ^{[2
]}

Bodenschatz, Eberhard ^{[3
,4
,5
,6
]}

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[2] LSGC CNRS GRP ENSIC, F-54001 Nancy, France

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

[4] Univ Gottingen, Inst Nonlinear Dynam, D-37073 Gottingen, Germany

[5] Cornell Univ, Lab Atom & Solid State Phys, Ithaca, NY 14853 USA

[6] Cornell Univ, Sibley Sch Mech & Aerosp Engn, Ithaca, NY 14853 USA

来源：

13TH EUROPEAN TURBULENCE CONFERENCE (ETC13): CONVECTION, ROTATION, STRATIFICATION AND BUOYANCY EFFECTS | 2011年 / 318卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1088/1742-6596/318/8/082001

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We report experimental results for the heat transport, as expressed by the Nusselt number Nu, by turbulent Rayleigh-Benard convection in a cylindrical sample of aspect ratio Gamma equivalent to D/L = 0.50 (D = 1.12 m is the diameter and L = 2.24 m the height). The measurements are for the Rayleigh-number range 10(12) less than or similar to Ra less than or similar to 10(15) and for a Prandtl number Pr similar or equal to 0.86. At these large Ra the results were exceptionally sensitive to details of the experiment. Near Ra = 10(15) the Nusselt number could be caused to vary over the range 3500 less than or similar to Nu less than or similar to 5800 by minor changes in the apparatus or operating procedure.

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