Universal decay of scalar turbulence

Details Universal decay of scalar turbulence Universal decay of scalar turbulence

2000-10-05

arxiv.org/abs/nlin/0010011v1

2001 Phys. Rev. Lett. 2305-2308

Nonlinear Sciences

Chaotic Dynamics

4 pages, 3 Postscript figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.86.2305

The asymptotic decay of passive scalar fields is solved analytically for the Kraichnan model, where the velocity has a short correlation time. At long times, two universality classes are found, both characterized by a distribution of the scalar -- generally non-Gaussian -- with global self-similar evolution in time. Analogous behavior is found numerically with a more realistic flow resulting from an inverse energy cascade.

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