Rayleigh-Bénard Convection in a Vertically Oscillated Fluid Layer

Autor:	J. Bougie, Jeffrey L. Rogers, Jack Swift, Michael F. Schatz
Rok vydání:	2000
Předmět:	Physics Convection Phase (waves) Fluid layer General Physics and Astronomy Mechanics symbols.namesake Classical mechanics Harmonic symbols Wavenumber Rayleigh scattering Rayleigh–Bénard convection Marginal stability
Zdroj:	Physical Review Letters. 84:87-90
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.84.87
Popis:	We report on the first quantitative observations of convection in a fluid layer driven by both heating from below and vertical sinusoidal oscillation. Just above onset, convection patterns are modulated either harmonically or subharmonically to the drive frequency. Single-frequency patterns exhibit nearly solid-body rotations with harmonic and subharmonic states always rotating in opposite directions. Flows with both harmonic and subharmonic responses are found near a codimension-two point, yielding novel coexisting patterns with symmetries not found in either single-frequency states. Predictions from linear stability analysis of the onset Rayleigh and wave numbers compare well with experiment, and phase boundaries for coexisting patterns track single-frequency marginal stability curves.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::358384a19785b02ac040eaa80a06a909 https://doi.org/10.1103/physrevlett.84.87 Zobrazit plný text záznamu