Penta-Hepta Defect Chaos in a Model for Rotating Hexagonal Convection

Yuan Nan Young, Hermann Riecke

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1 Scopus citations


In a model for rotating non-Boussinesq convection with mean flow, we identify a regime of spatiotemporal chaos that is based on a hexagonal planform and is sustained by the induced nucleation of dislocations by penta-hepta defects. The probability distribution function for the number of defects deviates substantially from the usually observed Poisson-type distribution. It implies strong correlations between the defects in the form of density-dependent creation and annihilation rates of defects. We extract these rates from the distribution function and also directly from the defect dynamics.

Original languageEnglish (US)
Pages (from-to)4
Number of pages1
JournalPhysical Review Letters
Issue number13
StatePublished - 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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