Journal article
Gyrokinetic simulation of entropy cascade in two-dimensional electrostatic turbulence
Journal of plasma and fusion research series, Vol.9, pp.509-516
08/13/2010
Abstract
Two-dimensional electrostatic turbulence in magnetized weakly-collisional plasmas exhibits a cascade of
entropy in phase space [Phys. Rev. Lett. 103, 015003 (2009)]. At scales smaller than the gyroradius, this cascade
is characterized by the dimensionless ratio D of the collision time to the eddy turnover time measured at the scale
of the thermal Larmor radius. When D >> 1, a broad spectrum of fluctuations at sub-Larmor scales is found in
both position and velocity space. The distribution function develops structure as a function of v⊥, the velocity
coordinate perpendicular to the local magnetic field. The cascade shows a local-scale nonlinear interaction in
both position and velocity spaces, and Kolmogorov’s scaling theory can be extended into phase space.
Details
- Title: Subtitle
- Gyrokinetic simulation of entropy cascade in two-dimensional electrostatic turbulence
- Creators
- T Tatsuno - University of Maryland, College ParkM Barnes - University of Maryland, College ParkS C Cowley - Imperial College LondonWilliam Dorland - University of Maryland, College ParkGregory G Howes - University of Iowa, Physics and AstronomyR Numata - University of Maryland, College ParkG. G Plunk - Max Planck SocietyAlexander A Schekochihin - Imperial College London
- Resource Type
- Journal article
- Publication Details
- Journal of plasma and fusion research series, Vol.9, pp.509-516
- ISSN
- 1883-9630
- Language
- English
- Date published
- 08/13/2010
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984443355102771
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