Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published June 2004 | Submitted
Journal Article Open

Averaging Versus Chaos in Turbulent Transport?


In this paper we analyze the transport of passive tracers by deterministic stationary incompressible flows which can be decomposed over an infinite number of spatial scales without separation between them. It appears that a low order dynamical system related to local Peclet numbers can be extracted from these flows and it controls their transport properties. Its analysis shows that these flows are strongly self-averaging and super-diffusive: the delay τ (r) for any finite number of passive tracers initially close to separate till a distance r is almost surely anomalously fast (τ (r)∼ r^(2–ν) , with ν > 0). This strong self-averaging property is such that the dissipative power of the flow compensates its convective power at every scale. However as the circulation increases in the eddies the transport behavior of the flow may (discontinuously) bifurcate and become ruled by deterministic chaos: the self-averaging property collapses and advection dominates dissipation. When the flow is anisotropic a new formula describing turbulent conductivity is identified.

Additional Information

© 2004 Springer-Verlag. Received: 18 October 2002. Accepted: 15 November 2003. Communicated by A. Kupiainen. Part of this work was supported by the Aly Kaufman fellowship. The author would like to thank F. Castell, Y. Velenik and G. Ben Arous for reading the manuscript and A. Majda, T. Hou and P.E. Dimotakis for useful discussions.

Attached Files

Submitted - 0402028.pdf


Files (729.6 kB)
Name Size Download all
729.6 kB Preview Download

Additional details

August 19, 2023
October 17, 2023