Scaling and universality in turbulent convection

Details Scaling and universality in turbulent convection Scaling and universality in turbulent convection

2001-10-09

arxiv.org/abs/nlin/0110016v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.88.054503

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.

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