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Dissipative instability of MHD tangential discontinuity in magnetized plasmas with anisotropic
 

Summary: Dissipative instability of MHD tangential
discontinuity in magnetized plasmas with anisotropic
viscosity and thermal conductivity.
By M.S.RUDERMANy, E.VERWICHTE, R.ERD '
ELYIyy and
M.GOOSSENS
Centre for Plasma Astrophysics, K.U.Leuven, B­3001 Heverlee, Belgium
yOn leave of Institute for Problems in Mechanics, Russian Academy of Sciences, 117526
Moscow, Russia
yyOn leave of Dept. of Astronomy, Ešotvšos University, Ludovika t'er 2, H­1083 Budapest,
Hungary

Abstract
The stability of the MHD tangential discontinuity is studied in compressible plasmas
in the presence of anisotropic viscosity and thermal conductivity. The general disper­
sion equation is derived and solutions to this dispersion equation and stability criteria
are obtained for the limiting cases of incompressible and cold plasmas. In these two
limiting cases the effect of thermal conductivity vanishes and the solutions are only in­
fluenced by viscosity. The stability criteria for viscous plasmas are compared with those
for ideal plasmas where stability is determined by the Kelvin­Helmholtz velocity VKH as

  

Source: Armagh Observatory

 

Collections: Physics