Preprint
Gyrokinetic simulation of entropy cascade in two-dimensional electrostatic turbulence
ArXiv.org
Cornell University
03/20/2010
DOI: 10.48550/arxiv.1003.3933
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_{perp}, 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 TatsunoM BarnesS. C CowleyW DorlandG. G HowesR NumataG. G PlunkA. A Schekochihin
- Resource Type
- Preprint
- Publication Details
- ArXiv.org
- Publisher
- Cornell University
- DOI
- 10.48550/arxiv.1003.3933
- ISSN
- 2331-8422
- Number of pages
- 8
- Comment
- Conference paper presented at 2009 Asia-Pacific Plasma Theory Conference. Ver.2 includes corrected typos & updated references
- Language
- English
- Date posted
- 03/20/2010
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984442212302771
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