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

相关论文

共 12 条

[1] ON THE ASPECT RATIOS OF 2-LAYER MANTLE CONVECTION [J].

BUSSE, FH .

PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1981, 24 (04) :320-324

[2]

CARDIN P, UNPUB J PHYS PARIS

[3] 3-DIMENSIONAL INFINITE PRANDTL NUMBER CONVECTION IN ONE AND 2 LAYERS WITH IMPLICATIONS FOR THE EARTHS GRAVITY-FIELD [J].

CSEREPES, L ;

RABINOWICZ, M ;

ROSEMBERGBOROT, C .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1988, 93 (B10) :12009-12025

[4] NUMERICAL-MODELS OF THERMALLY AND MECHANICALLY COUPLED 2-LAYER CONVECTION OF HIGHLY VISCOUS FLUIDS [J].

ELLSWORTH, K ;

SCHUBERT, G .

GEOPHYSICAL JOURNAL-OXFORD, 1988, 93 (02) :347-363

[5]

HONDA S, 1982, B EARTHQ RES I TOKYO, V57, P273

[6] WHAT IS RESPONSIBLE FOR THERMAL COUPLING IN LAYERED CONVECTION [J].

NATAF, HC ;

MORENO, S ;

CARDIN, P .

JOURNAL DE PHYSIQUE, 1988, 49 (10) :1707-1714

[7]

OLSON P, 1984, J GEOPHYS RES, V13, P11293

[8] THE INTERACTION OF 2 SPATIALLY RESONANT PATTERNS IN THERMAL-CONVECTION .1. EXACT 1-2 RESONANCE [J].

PROCTOR, MRE ;

JONES, CA .

JOURNAL OF FLUID MECHANICS, 1988, 188 :301-335

[9] A THEORETICAL AND EXPERIMENTAL-STUDY OF DOUBLE-LAYER CONVECTION [J].

RASENAT, S ;

BUSSE, FH ;

REHBERG, I .

JOURNAL OF FLUID MECHANICS, 1989, 199 :519-540

[10] STABILITY OF A CHEMICALLY LAYERED MANTLE [J].

RICHTER, FM ;

JOHNSON, CE .

JOURNAL OF GEOPHYSICAL RESEARCH, 1974, 79 (11) :1635-1639