http://www.cnr.it/ontology/cnr/individuo/prodotto/ID44477
Statistics of two-particle dispersion in two-dimensional turbulence (Articolo in rivista)
- Type
- Label
- Statistics of two-particle dispersion in two-dimensional turbulence (Articolo in rivista) (literal)
- Anno
- 2002-01-01T00:00:00+01:00 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Boffetta G., Sokolov I.M. (literal)
- Pagina inizio
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Titolo
- Statistics of two-particle dispersion in two-dimensional turbulence (literal)
- Abstract
- We investigate Lagrangian relative dispersion in direct numerical
simulation of two-dimensional inverse cascade turbulence. The analysis is
performed by using both standard fixed time statistics and an exit time
approach. The latter allows a more precise determination of the Richardson
constant which is found to be $g \simeq 4$ with a possible weak finite-size
dependence. Our results show only small deviations with respect to the
original Richardson's description in terms of diffusion equation. These
deviations are associated with the long-range correlated nature of the
particles' relative motion. The correlation, or persistence, parameter is
measured by means of a Lagrangian ``turning point'' statistics.
(literal)
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