[Table of Contents]

Plasma and Fusion Research

Volume 5, S2015 (2010)

Regular Articles


Turbulence Evolution in Plasma Shear Flows
Vladimir S. MIKHAILENKO, Vladimir V. MIKHAILENKO1,2) and Konstantin N. STEPANOV1)
V.N. Karazin Kharkov National University, 61108 Kharkov, Ukraine
1)
National Science Center “Kharkov Institute of Physics and Technology”, 61108 Kharkov, Ukraine
2)
University of Madeira, 9000 Funchal, Portugal
(Received 9 December 2009 / Accepted 24 March 2010 / Published 10 December 2010)

Abstract

The renormalized nonlinear analysis of the temporal evolution of drift-type modes in plasma shear flows is developed. The theory accounts for the effect of the tubulent motions of plasma on the saturation of the resistive drift instability. The nonlinear balance equation, which determines the saturation level of the resistive drift instability in shear flow is obtained. It was prowed that the “nonlinear effect of the enhanced decorrelation by shear flow” has nothing in common with process of the saturation. The same conclusion is applicable to all fluid models of plasma, obtained in drift approximation, in which all nonlinearities, other than E×B are ignored. The linear non-modal kinetic theory to the Vlasov-Poisson system is developed. This theory reveals the velocity shear in a non-modal time-dependent effect of the finite Larmor radius.


Keywords

plasma instability, shear flow, renormalized theory, saturation, non-modal kinetic theory

DOI: 10.1585/pfr.5.S2015


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This paper may be cited as follows:

Vladimir S. MIKHAILENKO, Vladimir V. MIKHAILENKO and Konstantin N. STEPANOV, Plasma Fusion Res. 5, S2015 (2010).