Acceleration statistics of heavy particles in turbulence (Articolo in rivista)

Type
Label
  • Acceleration statistics of heavy particles in turbulence (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1017/S002211200500844X (literal)
Alternative label
  • Bec, J (1); Biferale, L (2); Boffetta, G (3); Celani, A (4); Cencini, M (5); Lanotte, A (6); Musacchio, S (7); Toschi, F (8) (2006)
    Acceleration statistics of heavy particles in turbulence
    in Journal of fluid mechanics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Bec, J (1); Biferale, L (2); Boffetta, G (3); Celani, A (4); Cencini, M (5); Lanotte, A (6); Musacchio, S (7); Toschi, F (8) (literal)
Pagina inizio
  • 349 (literal)
Pagina fine
  • 358 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 550 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) CNRS Observatoire de la Cote d'Azur, B.P.4229, 06304 Nice Cedex 4, France; 2) Department of Physics and INFN, University of Rome \"Tor Vergata \", Via della Ricerca Scientifica 1, 00133 Roma, Italy; 3) Department of Physics and INFN, University of Torino, Via Pietro Giuria 1, 10125, Torino, Italy; 4) CNRS, INLN, 1361 Route des Lucioles, F-06560 Valbonne, France; 5) SMC-INFM c/o Department of Physics, University of Rome \"La Sapienza \", Piazz.le A.Moro, 2, I-00185 Roma, Italy, and CNR-ISC via dei Taurini 19, I-00185 Roma, Italy; 6) CNR-ISAC, Sezione di Lecce, Str.Prov. Lecce-Monteroni km 1,200, I-73100 Lecce, Italy; 7) Department of Physics, University of Rome \"La Sapienza \", Piazz.le A.Moro, 2, I-00185 Roma, Italy; 8) CNR-IAC, Viale del Policlinico 137, I-00161 Roma, Italy and INFN, Sezione di Ferrara, via G.Saragat 1, I-44100, Ferrara, Italy (literal)
Titolo
  • Acceleration statistics of heavy particles in turbulence (literal)
Abstract
  • We present the results of direct numerical simulations of heavy particle transport in homogeneous, isotropic, fully developed turbulence, up to resolution 512(3) (R-lambda approximate to 185). Following the trajectories of up to 120 million particles with Stokes numbers, St, in the range from 0.16 to 3.5 we are able to characterize in full detail the statistics of particle acceleration. We show that: (i) the root-mean-squared acceleration arms sharply falls off from the fluid tracer value at quite small Stokes numbers; (ii) at a given St the normalized acceleration a(rms)/(is an element of(3)/nu)(1/4) increases with R-lambda consistently with the trend observed for fluid tracers; (iii) the tails of the probability density function of the normalized acceleration a/a(rms) decrease with St. Two concurrent mechanisms lead to the above results: preferential concentration of particles, very effective at small St. and filtering induced by the particle response time, that takes over at larger St. (literal)
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