Large-Scale Flow and Spiral Core Instability in Rayleigh-Benard Convection

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dc.creatorAranson, Igor
dc.creatorAssenheimer, Michel
dc.creatorSteinberg, Victor
dc.creatorTsimring, Lev S.
dc.date1996-08-13
dc.date.accessioned2026-07-07T09:16:02Z
dc.date.available2026-07-07T09:16:02Z
dc.descriptionThe spiral core instability, observed in large aspect ratio Rayleigh-Benard convection, is studied numerically in the framework of the Swift-Hohenberg equation coupled to a large-scale flow. It is shown that the instability leads to non-trivial core dynamics and is driven by the self-generated vorticity. Moreover, the recently reported transition from spirals to hexagons near the core is shown to occur only in the presence of a non-variational nonlinearity, and is triggered by the spiral core instability. Qualitative agreement between the simulations and the experiments is demonstrated.
dc.descriptionReVTeX, 10 pages, 6 EPS Figures, submitted to Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/patt-sol/9608003
dc.identifierhttp://arxiv.org/abs/patt-sol/9608003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/153223
dc.subjectPattern Formation and Solitons
dc.titleLarge-Scale Flow and Spiral Core Instability in Rayleigh-Benard Convection
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