Defect Chaos of Oscillating Hexagons in Rotating Convection

Blas Echebarria, Hermann Riecke

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Using coupled Ginzburg-Landau equations, the dynamics of hexagonal patterns with broken chiral symmetry are investigated, as they appear in rotating non-Boussinesq or surface-tension-driven convection. We find that close to the secondary Hopf bifurcation to oscillating hexagons the dynamics are well described by a single complex Ginzburg-Landau equation (CGLE) coupled to the phases of the hexagonal pattern. At the band center these equations reduce to the usual CGLE and the system exhibits defect chaos. Away from the band center a transition to a frozen vortex state is found.

Original languageEnglish (US)
Pages (from-to)4838-4841
Number of pages4
JournalPhysical review letters
Volume84
Issue number21
DOIs
StatePublished - May 22 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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