NONLINEAR DYNAMIC COUPLING OBSERVED NEAR THE THRESHOLD OF CONVECTION IN A 2-LAYER SYSTEM

被引:18
作者
CARDIN, P
NATAF, HC
机构
[1] Departement de Geologic, Ecole Normale Superieure 2U, Paris
来源
EUROPHYSICS LETTERS | 1991年 / 14卷 / 07期
关键词
D O I
10.1209/0295-5075/14/7/008
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Laboratory expeiments on Rayleigh-Benard convection in a 2-layer system have been conducted. Remarkable nonlinear coupling is observed for Rayleigh numbers not far above the critical one. Two examples are described: the first one displays a steady resonance pattern with two rolls above each roll of the bottom layer, while in the second example, a pseudoperiodic time oscillation is observed, with a single time-dependent horizontal wavelength. In both cases, the coupling is predominantly <<thermal>>, implying that some kind of interface viscosity is present.
引用
收藏
页码:655 / 660
页数:6
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