Rotating Convection in an Anisotropic System

Details Rotating Convection in an Anisotropic System Rotating Convection in an Anisotropic System

2001-10-22

arxiv.org/abs/nlin/0110041v1

Nonlinear Sciences

Pattern Formation and Solitons

Scientific paper

10.1103/PhysRevE.65.046219

We study the stability of patterns arising in rotating convection in weakly anisotropic systems using a modified Swift-Hohenberg equation. The anisotropy, either an endogenous characteristic of the system or induced by external forcing, can stabilize periodic rolls in the K\"uppers-Lortz chaotic regime. For the particular case of rotating convection with time-modulated rotation where recently, in experiment, chiral patterns have been observed in otherwise K\"uppers-Lortz-unstable regimes, we show how the underlying base-flow breaks the isotropy, thereby affecting the linear growth-rate of convection rolls in such a way as to stabilize spirals and targets. Throughout we compare analytical results to numerical simulations of the Swift-Hohenberg equation.

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