http://www.cnr.it/ontology/cnr/individuo/prodotto/ID8432
Multi-time multi-scale correlation functions in hydrodynamic turbulence (Articolo in rivista)
- Type
- Label
- Multi-time multi-scale correlation functions in hydrodynamic turbulence (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1063/1.3623466 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Biferale L., Calzavarini E., Toschi F. (literal)
- Pagina inizio
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1. Univ Lille 1 Sci & Technol, Int Collaborat Turbulence Res, Lab Mecan Lille, CNRS,UMR 8107, F-59650 Villeneuve Dascq, France
2. Polytech Lille, F-59650 Villeneuve Dascq, France
3. Univ Roma Tor Vergata, Int Collaborat Turbulence Res, Dept Phys, I-00133 Rome, Italy
4. Univ Roma Tor Vergata, INFN, I-00133 Rome, Italy
5. Eindhoven Univ Technol, Dept Phys, Int Collaborat Turbulence Res, NL-5600 MB Eindhoven, Netherlands
6. Eindhoven Univ Technol, Dept Math & Comp Sci, NL-5600 MB Eindhoven, Netherlands
7. Eindhoven Univ Technol, JM Burgers Ctr Fluid Dynam, NL-5600 MB Eindhoven, Netherlands
8. CNR, IAC, I-00185 Rome, Italy (literal)
- Titolo
- Multi-time multi-scale correlation functions in hydrodynamic turbulence (literal)
- Abstract
- High Reynolds numbers Navier-Stokesequations are believed to break self-similarity concerning both spatial and temporal properties: correlation functions of different orders exhibit distinct decorrelation times and anomalous spatial scaling properties. Here, we present a systematic attempt to measure multi-time and multi-scale correlations functions, by using high Reynolds numbers numerical simulations of fully homogeneous and isotropic turbulent flow. The main idea is to set-up an ensemble of probing stations riding the flow, i.e., measuring correlations in a reference frame centered on the trajectory of distinct fluid particles (the quasi-Lagrangian reference frame introduced by Belinicher and L'vov [Sov. Phys. JETP 66, 303 (1987)]). In this way, we reduce the large-scale sweeping and measure the non-trivial temporal dynamics governing the turbulent energy transfer from large to small scales. We present evidences of the existence of the dynamic multiscaling properties of turbulence - first proposed by L'vov et al. [Phys. Rev. E 55, 7030 (1997)] - in which multi-time correlation functions are characterized by an infinite set of characteristic times. (literal)
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