Theoretical and numerical study of highly anisotropic turbulent flows (Articolo in rivista)

Type
Label
  • Theoretical and numerical study of highly anisotropic turbulent flows (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Alternative label
  • Biferale L., Daumont I., Lanotte A., Toschi F. (2004)
    Theoretical and numerical study of highly anisotropic turbulent flows
    in European journal of mechanics. B, Fluids
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Biferale L., Daumont I., Lanotte A., Toschi F. (literal)
Pagina inizio
  • 401 (literal)
Pagina fine
  • 414 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 23 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Fisica, Università \"Tor Vergata\", Via della Ricerca Scientifica 1, 00133, Roma, Italy CNR, ISAC – Sezione di Lecce, Str. Prov. Lecce-Monteroni Km 1.200, 73100, Lecce, Italy CNR, Istituto per le Applicazioni del Calcolo, Viale del Policlinico 137, 00161, Roma, Italy INFM, Unità di Tor Vergata, Via della Ricerca Scientifica 1, 00133, Roma, Italy (literal)
Titolo
  • Theoretical and numerical study of highly anisotropic turbulent flows (literal)
Abstract
  • We present a detailed numerical study of anisotropic statistical fluctuations in stationary, homogeneous turbulent flows. We address both problems of intermittency in anisotropic sectors, and the relative importance of isotropic and anisotropic fluctuations at different scales on a direct numerical simulation of a three-dimensional random Kolmogorov flow. We review a simple argument to predict the dimensional scaling for all velocity moments, in all anisotropic sectors. We extend a previous analysis made on the same data set (Phys. Rev. Lett. 86 (2001) 4831) presenting (i) the statistical behavior of spectra and co-spectra; (ii) high-order longitudinal structure functions; (iii) anisotropic fluctuations of the full tensorial two-points velocity correlations. Among the many issues discussed, we stress the problem of the return-to-isotropy, the universality of anisotropic fluctuations and the foliation mechanism. A new a priori test on sub-grid quantities used in Large-Eddy Simulations is also presented. (literal)
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