Advances and Current Challenges in the Theory of ZonalFlow Generation
Abstract
Some remarks are made about the use of modern statistical formalism in the calculation of the zonalflow growth rate and the backreaction of zonal flows on drift waves. The intimate connection between the zonal growthrate calculation and the derivation of a statistical formula for eddy viscosity in twodimensional neutral fluids is emphasized, as is the the role of Casimir invariants in disparatescale expansion. Also stressed is the importance of random Galilean invariance in the calculation of the triad interaction time between shortwavelength drift waves and longwavelength flows.
 Publication:

International Symposium on Waves, Coherent Structures and Turbulence in Plasmas
 Pub Date:
 November 2010
 DOI:
 10.1063/1.3526158
 Bibcode:
 2010AIPC.1308....1K
 Keywords:

 plasma drift waves;
 fluid mechanics;
 gyromagnetic effect;
 Poisson equation;
 polarization;
 52.35.Kt;
 52.35.Py;
 52.30.Gz;
 41.20.Cv;
 42.68.Mj;
 Drift waves;
 Macroinstabilities;
 Gyrokinetics;
 Electrostatics;
 Poisson and Laplace equations boundaryvalue problems;
 Scattering polarization