Astrophysics and Space Science

, Volume 213, Issue 2, pp 197–204 | Cite as

Thermosolutal instability of a radiating partially-ionized plasma in a porous medium

  • F. E. Opara


The thermosolutal instability of a radiating two-component plasma, in a porous medium in the presence of a uniform vertical magnetic field, is examined with respect to the effects of collision frequency and radiative transfer. A combination of the Bestman and Chandrasekar methods is used to solve the eigenvalue problem with two-dimensional disturbances for the case of stationary convection. Radiation present on the onset of instability is found to have a destabilizing effect for even a very small radiation parameter, of the orderα(0.1). concentration gradient on the other hand has a stabilizing effect on the system. The effect of collision on the onset of stationary cells diminishes for the optical thin non-grey plasma-near equilibrium. This is of paramount importance in cosmic ray physics, as the interaction between the ionized and neutral gas components represents a state which often exists in the universe.


Convection Porous Medium Radiative Transfer Collision Frequency Radiation Parameter 
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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • F. E. Opara
    • 1
  1. 1.Department of PhysicsRivers State University of Science and TechnologyPort HarcourtNigeria

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