| Issue |
Europhys. Lett.
Volume 47, Number 2, July II 1999
|
|
|---|---|---|
| Page(s) | 152 - 157 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i1999-00350-5 | |
| Published online | 01 December 2003 | |
Drude approach to anomalous diffusion: Application to Richardson dispersion in turbulent flows
1
Theoretische Polymerphysik, Universität Freiburg, Hermann-Herder Straße 3 D-79104 Freiburg i.Br., Germany
2
School of Chemistry, Tel Aviv University - Tel Aviv 69978, Israel
Received:
4
February
1999
Accepted:
19
May
1999
We investigate two-particle dispersion in fully developed turbulence within a Lévy-walk stochastic model using a generalized Drude approach. Different from one-particle pictures we focus here on the time evolution of the relative distance between two particles. Based on the Kolmogorov-Obukhov energy spectrum and on the temporal correlations in the flow the Richardson t3-law follows as a Lévy-type enhancement of rare events.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 47.27.Qb – Turbulent diffusion
© EDP Sciences, 1999
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