Observation of the 1/2 power law in Rayleigh-Benard convection -: art. no. 045303

被引：126

作者：

Roche, PE

Castaing, B

Chabaud, B

Hébral, B

机构：

[1] Univ Grenoble 1, Ctr Rech Tres Basses Temp, CNRS, F-38042 Grenoble 9, France

[2] Ecole Normale Super Lyon, F-69364 Lyon 7, France

来源：

PHYSICAL REVIEW E | 2001年 / 63卷 / 04期

关键词：

D O I：

10.1103/PhysRevE.63.045303

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The 1/2 power law is reported in st Rayleigh-Benard experiment: Nu similar to Ra-1/2, where Ra and Nu are the Rayleigh and Nusselt numbers. This observation is coherent with the predictions of the ultimate convection regime, characterized by fully turbulent heat transfers. Ordered rough boundaries are used to cancel the correction due to the thickness variation of the viscous sublayer, and the observation of the asymptotic regime is therefore possible. This result supports the interpretation of a laminar-turbulent boundary-layer transition to account for the observation of Chavanne et al. of a new regime.

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页码：453031 / 453034

页数：4

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