Title: Self-heating in kinematically complex magnetohydrodynamic flows
Authors: Osmanov, Zaza ×
Rogava, Andria
Poedts, Stefaan #
Issue Date: 18-Jan-2012
Publisher: American Institute of Physics
Series Title: Physics of Plasmas vol:19 issue:1 pages:-
Article number: 012901
Abstract: The non-modal self-heating mechanism driven by the velocity shear in kinematically complex magnetohydrodynamic (MHD) plasma flows is considered. The study is based on the full set of MHD equations including dissipative terms. The equations are linearized and unstable modes in the flow are looked for. Two different cases are specified and studied: (a) the instability related to an exponential evolution of the wave vector and (b) the parametric instability, which takes place when the components of the wave vector evolve in time periodically. By examining the dissipative terms, it is shown that the self-heating rate provided by viscous damping is of the same order of magnitude as that due to the magnetic resistivity. It is found that the heating efficiency of the exponential instability is higher than that of the parametric instability. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3675865]
ISSN: 1070-664X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
× corresponding author
# (joint) last author

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