Stability of the thermodynamic equilibrium: A test of the validity of dynamic models as applied to gyroviscous perpendicular magnetohydrodynamics
Abstract
Stability of the thermodynamic equilibrium is put forward as a simple test of the validity of dynamic equations, and is applied to perpendicular gyroviscous magnetohydrodynamics (i.e., perpendicular magnetohydrodynamics with gyroviscosity added). This model turns out to be invalid because it predicts exponentially growing Alfvén waves in a spatially homogeneous static equilibrium with scalar pressure.
- Publication:
-
Physics of Fluids
- Pub Date:
- May 1988
- DOI:
- 10.1063/1.866759
- Bibcode:
- 1988PhFl...31.1291F
- Keywords:
-
- Dynamic Models;
- Magnetohydrodynamic Stability;
- Thermodynamic Equilibrium;
- Collisionless Plasmas;
- Conservation Laws;
- Larmor Radius;
- Magnetohydrodynamic Waves;
- Viscosity;
- Plasma Physics