http://www.cnr.it/ontology/cnr/individuo/prodotto/ID171978
3D chaotic model for sub-grid turbulent dispersion in Large-Eddy Simulations (Articolo in rivista)
- Type
- Label
- 3D chaotic model for sub-grid turbulent dispersion in Large-Eddy Simulations (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1175/2007JAS2410.1 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- G. Lacorata, A. Mazzino, U. Rizza (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- GUGLIELMO LACORATA; UMBERTO RIZZA: ISAC, sezione di lecce
A.Mazzino: Università di Genova (literal)
- Titolo
- 3D chaotic model for sub-grid turbulent dispersion in Large-Eddy Simulations (literal)
- Abstract
- A 3D multiscale kinematic velocity field is introduced as a model to simulate Lagrangian turbulent
dispersion. The incompressible velocity field is a nonlinear deterministic function, periodic in space and
time, that generates chaotic mixing of Lagrangian trajectories. Relative dispersion properties, for example
Richardsons law, are correctly reproduced under two basic conditions: 1) the velocity amplitudes of the
spatial modes must be related to the corresponding wavelengths through the Kolmogorov scaling and 2) the
problem of the lack of a sweeping effect of the small eddies by the large eddies, common to kinematic
simulations, has to be taken into account. It is shown that, as far as Lagrangian dispersion is concerned, the
model presented herein can be successfully applied as an additional subgrid contribution for large eddy
simulations of the planetary boundary layer flow. (literal)
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- Autore CNR
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