Inverse Energy Cascade in Three-Dimensional Isotropic Turbulence (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Inverse Energy Cascade in Three-Dimensional Isotropic Turbulence (Articolo in rivista) (literal)

Anno

• 2012-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1103/PhysRevLett.108.164501 (literal)

Alternative label

• Luca Biferale, Stefano Musacchio and Federico Toschi (2012)
  Inverse Energy Cascade in Three-Dimensional Isotropic Turbulence
  in Physical review letters
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Luca Biferale, Stefano Musacchio and Federico Toschi (literal)

Pagina inizio

• 164501 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 108 (literal)

Rivista

• Physical review letters (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Department of Physics & INFN, Università Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy CNRS, Laboratoire J. A. Dieudonné UMR 7351, Parc Valrose, 06108 Nice, France Department of Physics and Department of Mathematics and Computer Science, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands & CNR-IAC, Via dei Taurini 19, 00185 Rome, Italy (literal)

Titolo

• Inverse Energy Cascade in Three-Dimensional Isotropic Turbulence (literal)

Abstract

• We study the statistical properties of homogeneous and isotropic three-dimensional (3D) turbulent flows. By introducing a novel way to make numerical investigations of Navier-Stokes equations, we show that all 3D flows in nature possess a subset of nonlinear evolution leading to a reverse energy transfer: from small to large scales. Up to now, such an inverse cascade was only observed in flows under strong rotation and in quasi-two-dimensional geometries under strong confinement. We show here that energy flux is always reversed when mirror symmetry is broken, leading to a distribution of helicity in the system with a well-defined sign at all wave numbers. Our findings broaden the range of flows where the inverse energy cascade may be detected and rationalize the role played by helicity in the energy transfer process, showing that both 2D and 3D properties naturally coexist in all flows in nature. The unconventional numerical methodology here proposed, based on a Galerkin decimation of helical Fourier modes, paves the road for future studies on the influence of helicity on small-scale intermittency and the nature of the nonlinear interaction in magnetohydrodynamics. (literal)

Prodotto di

• Dinamica dei sistemi complessi fluidodinamici e biologici (MD.P02.002.001) (Modulo)
• Istituto per le applicazioni del calcolo \"Mauro Picone\" (IAC) (Istituto)

Autore CNR

• FEDERICO TOSCHI (Unità di personale interno)

Incoming links:

Prodotto

• Istituto per le applicazioni del calcolo \"Mauro Picone\" (IAC) (Istituto)
• Dinamica dei sistemi complessi fluidodinamici e biologici (MD.P02.002.001) (Modulo)

Autore CNR di

• FEDERICO TOSCHI (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Physical review letters (Rivista)