Search for the "Ultimate State" in Turbulent Rayleigh-Beacutenard Convection

被引：48

作者：

Funfschilling, Denis ^{[1
]}

Bodenschatz, Eberhard ^{[2
]}

Ahlers, Guenter ^{[3
]}

机构：

[1] CNRS, GROUPE ENSIC, LSGC, F-54001 Nancy, France

[2] Max Planck Inst Dynam & Self Org, D-37077 Gottingen, Germany

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

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 01期

基金：

美国国家科学基金会;

关键词：

THERMAL-CONVECTION; BENARD CONVECTION; CRYOGENIC HELIUM; LOW-TEMPERATURE; DYNAMICS; FLOW;

D O I：

10.1103/PhysRevLett.103.014503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the Nusselt number Nu and of temperature variations Delta T-b in the bulk fluid are reported for turbulent Rayleigh-Beacutenard convection of a cylindrical sample. They cover the Rayleigh-number range 10(9)less than or similar to Ra less than or similar to 3x10(14) using He (Prandtl number Pr=0.67), N-2 (Pr=0.72) and SF6 (Pr=0.79 to 0.84) at pressures up to 15 bars and near-ambient temperatures. The sample had a height L=2.24 m and diameter D=1.12 m and was located in a new High-Pressure Convection Facility (HPCF) at the Max Planck Institute for Dynamics and Self-Organization in Goumlttingen, Germany. The data do not show the transition to an "ultimate regime" reported by Chavanne et al. and are consistent with the measurements of Niemela et al.

引用

页数：4

共 29 条

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