Flow coupling mechanisms in two-layer Rayleigh-Benard convection

Rayleigh-Benard convection in two-layer systems is characterized by two distinct modes of flow coupling. These are: thermal coupling and mechanical coupling. Intelligible observations of the temperature field for both coupling mechanisms are provided. The flow coupling mechanisms are experimentally...

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Bibliographic Details
Published inExperiments in fluids Vol. 23; no. 3; pp. 252 - 261
Main Authors PRAKASH, A, YASUDA, K, OTSUBO, F, KUWAHARA, K, DOI, T
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 28.07.1997
Berlin
Subjects
Buoyancy-driven instability
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Hydrodynamic stability
Instrumentation for fluid dynamics
Physics
Rayleigh-Benard instability
Convective instabilities
Test facilities
Cellular convection
Two layer medium
Unsteady flow
Experimental study
Immiscible fluid
Viscous fluids
Heat transfer
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Summary:Rayleigh-Benard convection in two-layer systems is characterized by two distinct modes of flow coupling. These are: thermal coupling and mechanical coupling. Intelligible observations of the temperature field for both coupling mechanisms are provided. The flow coupling mechanisms are experimentally characterized as a function of the contrast in the buoyancy driving forces and in the viscosities of the two layers. Aside from the flow coupling between the layers, flow patterns in each layer, and their corresponding spatial transitions are found to be similar to those reported for single layer convection in rectangular boxes. (Author)
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0723-4864
1432-1114
DOI:10.1007/s003480050108