Non hydrodynamic modes in shell models of turbulence: a Lattice Boltzmann study (Articolo in rivista)

Type
Label
  • Non hydrodynamic modes in shell models of turbulence: a Lattice Boltzmann study (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.physd.2004.07.004 (literal)
Alternative label
  • Benzi R., Biferale L., Sbragaglia M., Succi, S.Toschi F. (2004)
    Non hydrodynamic modes in shell models of turbulence: a Lattice Boltzmann study
    in Physica. D, Nonlinear phenomena (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Benzi R., Biferale L., Sbragaglia M., Succi, S.Toschi F. (literal)
Pagina inizio
  • 303 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 197 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a Dipartimento di Fisica and INFN, Universita` \"Tor Vergata\", Via della Ricerca Scientifica 1, I-00133 Roma, Italy b Istituto per le Applicazioni del Calcolo, CNR, Viale del Policlinico 137, I-00161 Roma, Italy (literal)
Titolo
  • Non hydrodynamic modes in shell models of turbulence: a Lattice Boltzmann study (literal)
Abstract
  • A lattice Boltzmann scheme simulating the dynamics of shell models of turbulence is developed. The influence of high-order kinetic modes (ghosts) on the dissipative properties of turbulence dynamics is studied. It is analytically found that when ghost fields relax on the same timescale as the hydrodynamic ones, their major effect is a net enhancement of the fluid viscosity. The bare fluid viscosity is recovered by letting ghost fields evolve on a much longer timescale. Analytical results are borne out by high-resolution numerical simulations. These simulations indicate that the hydrodynamic manifold is very robust towards large fluctuations of non-hydrodynamic fields. (literal)
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