Abstract
We employ numerical computations of the full Navier-Stokes equations to investigate non-Boussinesq convection in a rotating system using water as the 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 is modeled by a quintic complex Ginzburg-Landau equation.
Original language | English (US) |
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Article number | 074501 |
Journal | Physical review letters |
Volume | 96 |
Issue number | 7 |
DOIs | |
State | Published - 2006 |
ASJC Scopus subject areas
- Physics and Astronomy(all)