CGL Defect Chaos and Bursts in Hexagonal Rotating non-Boussinesq Convection

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We employ numerical computations of the full Navier-Stokes equations to investigate non-Boussinesq convection in a rotating system using water as a working fluid. We identify two regimes. For weak non-Boussinesq effects the Hopf bifurcation from steady to oscillating (whirling) hexagons is supercritical and typical states exhibit defect chaos that is systematically described by the cubic complex Ginzburg-Landau equation. For stronger non-Boussinesq effects the Hopf bifurcation becomes subcritical and the oscillations exhibit localized chaotic bursting, which can be modeled by a quintic complex Ginzburg-Landau equation.
Submitted to Physical Review Letters

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Pattern Formation and Solitons, Chaotic Dynamics

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http://salesiana.dossiersoluciones.com/handle/123456789/81044

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nlin/0507059
 http://arxiv.org/abs/nlin/0507059

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arXiv