Non-Oberbeck-Boussinesq effects in gaseous Rayleigh-Benard convection

被引：61

作者：

Ahlers, Guenter ^{[1
]}

Araujo, Francisco Fontenele

Funfschilling, Denis

Grossmann, Siegfried

Lohse, Detlef

机构：

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

[2] Univ Calif Santa Barbara, iQCD, Santa Barbara, CA 93106 USA

[3] Univ Twente, Dept Appl Phys, NL-7500 AE Enschede, Netherlands

[4] Univ Twente, JM Burgers Ctr Fluid Dynam, NL-7500 AE Enschede, Netherlands

[5] Univ Marburg, Dept Phys, D-35032 Marburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.98.054501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Non-Oberbeck-Boussinesq (NOB) effects are measured experimentally and calculated theoretically for strongly turbulent Rayleigh-Benard convection of ethane gas under pressure where the material properties strongly depend on the temperature. Relative to the Oberbeck-Boussinesq case we find a decrease of the central temperature as compared to the arithmetic mean of the top- and bottom-plate temperature and an increase of the Nusselt number. Both effects are of opposite sign and greater magnitude than those for NOB convection in liquids like water.

引用

页数：4

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