Nonlinear Dynamical Coupling Observed near the Threshold of Convection in a Two-Layer System

Autor:	H.-C. Nataf, P. Cardin
Rok vydání:	1991
Předmět:	Physics Convection Oscillation General Physics and Astronomy Thermodynamics Mechanics Physics::Fluid Dynamics Wavelength Nonlinear system symbols.namesake Coupling (physics) Temperature gradient Thermal symbols Rayleigh scattering
Zdroj:	Europhysics Letters (EPL). 14:655-660
ISSN:	1286-4854 0295-5075
DOI:	10.1209/0295-5075/14/7/008
Popis:	Laboratory experiments 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4d7db7f6886f63e831b68777978e57b3 https://doi.org/10.1209/0295-5075/14/7/008 Zobrazit plný text záznamu