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The effect of transition layer inhomogeneity on the stability of compressible MHD fluids

Published online by Cambridge University Press:  01 December 2008

L. RAJAEE  and
B. SHOKRI
L. RAJAEE
Affiliation:
Shahid Beheshti University, G.C., Physics Dept. and Laser–Plasma Research Institute, 19839, Evin, Tehran, Iran (b-shokri@cc.sbu.ac.ir)
B. SHOKRI
Affiliation:
Shahid Beheshti University, G.C., Physics Dept. and Laser–Plasma Research Institute, 19839, Evin, Tehran, Iran (b-shokri@cc.sbu.ac.ir)
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Abstract

The Kelvin–Helmholtz instability on the interface of two magnetized compressible fluids with tangential discontinuity is studied in two situations. For a sharp interface, the stability conditions of the surface with tangential discontinuity is investigated. It is shown that in this case magnetohydrodynamic modes such as Alfvén and the magnetosonic waves can propagate. When a transition layer exists between two fluids and the density and magnetic field change across this layer, numerical solutions show that the increase of the Mach number and compressibility has a destabilizing effect while the magnetic field and density increase has a stabilizing effect.

Type
Papers
Information
Journal of Plasma Physics , Volume 74 , Issue 6 , December 2008 , pp. 827 - 837
Copyright
Copyright © Cambridge University Press 2008

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