title: Scaling and universality in turbulent convection.
abstract: Anomalous correlation functions of the temperature field in two-dimensional turbulent convection are shown to be universal with respect to the choice of external sources. Moreover, they are equal to the anomalous correlations of the concentration field of a passive tracer advected by the convective flow itself. The statistics of velocity differences is found to be universal, self-similar, and close to Gaussian. These results point to the conclusion that temperature intermittency in two-dimensional turbulent convection may be traced back to the existence of statistically preserved structures, as it is in passive scalar turbulence.
authors.affiliation: CNRS, INLN, 1361 Route des Lucioles, 06560 Valbonne, France.
authors.forename: Antonio
authors.initials: A
authors.lastname: Celani
authors.forename: Takeshi
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Andrea
authors.initials: A
authors.lastname: Mazzino
authors.forename: Massimo
authors.initials: M
authors.lastname: Vergassola