Stability of Oscillating Hexagons in Rotating Convection

Details Stability of Oscillating Hexagons in Rotating Convection Stability of Oscillating Hexagons in Rotating Convection

2000-02-22

arxiv.org/abs/nlin/0002038v1

Nonlinear Sciences

Pattern Formation and Solitons

25 pages, 7 figures

Scientific paper

10.1016/S0167-2789(00)00101-9

Breaking the chiral symmetry, rotation induces a secondary Hopf bifurcation in weakly nonlinear hexagon patterns which gives rise to oscillating hexagons. We study the stability of the oscillating hexagons using three coupled Ginzburg-Landau equations. Close to the bifurcation point we derive reduced equations for the amplitude of the oscillation, coupled to the phase of the underlying hexagons. Within these equation we identify two types of long-wave instabilities and study the ensuing dynamics using numerical simulations of the three coupled Ginzburg-Landau equations.

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