title: Penta-hepta defect chaos in a model for rotating hexagonal convection.
abstract: 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.
authors.affiliation: Department of Engineering Sciences and Applied Mathematics, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
authors.forename: Yuan-Nan
authors.initials: YN
authors.lastname: Young
authors.forename: Hermann
authors.initials: H
authors.lastname: Riecke