RESISTIVE INSTABILITIES OF A VISCOUS MAGNETOFLUID,

Abstract

The simultaneous influence of finite electrical conductivity and viscosity in the presence of a possibly varying gravitational field on the oscillatory modes of a plasma is examined, using the linearized non-ideal magneto-hydrodynamic equations. It is shown, that hydromagnetic modes of an inhomogeneous, incompressible plasma are strongly influenced by the behaviour of the 'Alfven frequency'. Furthermore, when the magnetic field of the equilibrium configuration is perpendicular to the wave vector of the perturbation, the magnetic field has no influence on all possible oscillatory-mode eigenfunctions. Finally, new modes due to the simultaneous introduction of finite electrical conductivity and viscosity are found. In the limit of zero viscosity or infinite electrical conductivity the results correspond to that previously obtained. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 25, 1968
Accession Number
AD0681513

Entities

People

  • Peter Unteregger

Organizations

  • University of Innsbruck

Tags

DTIC Thesaurus Topics

  • Conductivity
  • Differential Equations
  • Eigenvectors
  • Electrical Conductivity
  • Equations
  • Frequency
  • Gravitational Fields
  • Instability
  • Magnetic Fields
  • Mathematical Analysis
  • Mathematics
  • Perturbations
  • Physical Properties
  • Viscosity

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Plasma Physics / Magnetohydrodynamics