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research article

Locality and universality in gyrokinetic turbulence

Teaca, B.
•
Banon Navarro, A.
•
Jenko, F.
Show more
2012
Physical Review Letters

The nature of nonlinear interactions in gyrokinetic (GK) turbulence, driven by the ion-temperature gradient instability, is investigated using direct numerical simulations in toroidal flux tube geometry. To account for the level of separation existing between scales involved in an energetic interaction, the degree of locality of the free energy scale flux is analyzed employing Kraichnan s infrared (IR) and ultraviolet locality functions. Due to the nontrivial dissipative nature of GK turbulence, an asymptotic level for the locality exponents, indicative of a universal dynamical regime for GK s, is not recovered and an accentuated non-local behavior of the IR interactions is found instead, in spite of the local energy cascade observed.

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Type
research article
DOI
10.1103/PhysRevLett.109.235003
Web of Science ID

WOS:000312012200021

Author(s)
Teaca, B.
Banon Navarro, A.
Jenko, F.
Brunner, S.
Villard, L.
Date Issued

2012

Publisher

American Physical Society

Published in
Physical Review Letters
Volume

109

Issue

23

Article Number

235003

URL

URL

https://crpplocal.epfl.ch/pinboard/jpapers/1202103.pdf
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CRPP  
SPC  
Available on Infoscience
November 7, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/86707
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