Large-scale effects on meso-scale modeling for scalar transport (Articolo in rivista)

Type
Label
  • Large-scale effects on meso-scale modeling for scalar transport (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.physd.2006.07.007 (literal)
Alternative label
  • M. Cencini (a,b); A. Mazzino (c); S. Musacchio (d); A. Vulpiani (b,e,f) (2006)
    Large-scale effects on meso-scale modeling for scalar transport
    in Physica. D, Nonlinear phenomena (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Cencini (a,b); A. Mazzino (c); S. Musacchio (d); A. Vulpiani (b,e,f) (literal)
Pagina inizio
  • 146 (literal)
Pagina fine
  • 156 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S016727890600234X (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 220 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (a) INFM-CNR, Via dei Taurini 19, I-00185 Roma, Italy (b) INFM-SMC and Dipartimento di Fisica, Università \"La Sapienza\", P.zzle Aldo Moro 2, I-00185 Rome, Italy (c) Dipartimento di Fisica, Università di Genova and CNISM/INFN Sezione di Genova, Via Dodecanneso 33, I-16146 Genova, Italy (d) CNRS, INLN, 1361 Route des Lucioles, 06560 Valbonne, France (e) Dipartimento di Fisica and INFM UdR Roma 1, Università \"La Sapienza\", P.zzle A. Moro 2, I-00185 Roma, Italy (f) INFN -Sezione di Roma \"La Sapienza\", Italy (literal)
Titolo
  • Large-scale effects on meso-scale modeling for scalar transport (literal)
Abstract
  • The transport of scalar quantities passively advected by velocity fields with a component at small scale l can be modeled at scales larger than l by means of an effective drift and an effective diffusivity, which can be determined by means of multiple-scale techniques. We show that the presence of a weak flow at large scales L >> l induces interesting effects on the scalar transport at the meso-scales (i.e. at scales intermediate between l and L). In particular, it gives rise to non-isotropic and non-homogeneous corrections to the meso-scale drift and diffusivity. We discuss an approximation that allows us to retain the second-order effects caused by the large-scale flow. This provides a rather accurate meso-scale modeling for both asymptotic and pre-asymptotic scalar transport properties. Numerical simulations in model flows are used to illustrate the importance of such large-scale effects. (c) 2006 Elsevier B.V. All rights reserved. (literal)
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