Lagrangian structure functions in turbulence: A quantitative comparison between experiment and direct numerical simulation (Articolo in rivista)

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  • Lagrangian structure functions in turbulence: A quantitative comparison between experiment and direct numerical simulation (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.2930672 (literal)
Alternative label
  • L. Biferale (1); E. Bodenschatz (2); M. Cencini (3); A.S. Lanotte (4); N.T. Ouellette (5); F. Toschi (6); H. Xu (5) (2008)
    Lagrangian structure functions in turbulence: A quantitative comparison between experiment and direct numerical simulation
    in Physics of fluids (1994)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • L. Biferale (1); E. Bodenschatz (2); M. Cencini (3); A.S. Lanotte (4); N.T. Ouellette (5); F. Toschi (6); H. Xu (5) (literal)
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  • 20 (literal)
Rivista
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  • American Institute of Physics (AIP). (literal)
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  • 12 (literal)
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  • 6 (literal)
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  • ISI Web of Science (WOS) (literal)
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  • (1) International Collaboration for Turbulence Research and Dipartimento Fisica and INFN, Università di \"Tor Vergata,\" Via della Ricerca Scientifica 1, 00133 Roma, Italy (2) International Collaboration for Turbulence Research, Max Planck Institute for Dynamics and Self-Organization, Am Fassberg 17, D-37077 Goettingen, Germany and Laboratory of Atomic and Solid-State Physics, Cornell University, Ithaca, New York 14853, USA (3) International Collaboration for Turbulence Research, INFM-CNR, SMC Dipartimento di Fisica, Università di Roma \"La Sapienza,\" p.zle A. Moro 2, 00185 Roma, Italy and Istituto dei Sistemi Complessi-CNR, via dei Taurini 19, 00185 Roma, Italy (4) International Collaboration for Turbulence Research, CNR-ISAC, Sezione di Roma, Via Fosso del Cavaliere 100, 00133 Roma, Italy and INFN, Sezione di Lecce, 73100 Lecce, Italy (5) International Collaboration for Turbulence Research and Max Planck Institute for Dynamics and Self-Organization, Am Fassberg 17, D-37077 Goettingen, Germany (6) International Collaboration for Turbulence Research and Istituto per le Applicazioni del Calcolo CNR, Viale del Policlinico 137, 00161 Roma, Italy and INFN, Sezione di Ferrara, Via G. Saragat 1, I-44100 Ferrara, Italy (literal)
Titolo
  • Lagrangian structure functions in turbulence: A quantitative comparison between experiment and direct numerical simulation (literal)
Abstract
  • A detailed comparison between data from experimental measurements and numerical simulations of Lagrangian velocity structure functions in turbulence is presented. Experimental data, at Reynolds number ranging from R? = 350 to R? = 815, are obtained in a swirling water flow between counter-rotating baffled disks. Direct numerical simulations (DNS) data, up to R? = 284, are obtained from a statistically homogeneous and isotropic turbulent flow. By integrating information from experiments and numerics, a quantitative understanding of the velocity scaling properties over a wide range of time scales and Reynolds numbers is achieved. To this purpose, we discuss in detail the importance of statistical errors, anisotropy effects, and finite volume and filter effects, finite trajectory lengths. The local scaling properties of the Lagrangian velocity increments in the two data sets are in good quantitative agreement for all time lags, showing a degree of intermittency that changes if measured close to the Kolmogorov time scales or at larger time lags. This systematic study resolves apparent disagreement between observed experimental and numerical scaling properties. (literal)
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