Finite Larmor radius and Hall effects on thermal instability of a compressible plasma

Pramana ◽  
1987 ◽  
Vol 29 (1) ◽  
pp. 79-86 ◽  
Author(s):  
R C Sharma ◽  
J N Misra
Keyword(s):  
Thermal Instability ◽  
Larmor Radius ◽  
Finite Larmor Radius ◽  
Compressible Plasma ◽  
Hall Effects

scholarly journals Finite Larmor Radius and Hall Effects on Thermal Instability of a Plasma in Porous Medium

1994 ◽  
Vol 49 (4-5) ◽  
pp. 547-551 ◽  
Author(s):  
R. C. Sharma ◽  
V. K. Bhardwaj
Keyword(s):  
Porous Medium ◽  
Thermal Instability ◽  
Wave Number ◽  
Larmor Radius ◽  
Stationary Convection ◽  
Number Range ◽  
Finite Larmor Radius ◽  
Hall Effects ◽  
Wave Number Range ◽  
Medium Permeability

Abstract The thermal instability of a plasma in a porous medium in the presence of a finite Larmor radius (FLR) and Hall effects is considered. Oscillatory m odes due to the presence of a magnetic field (and hence the presence of FLR and Hall effects) are introduced. For stationary convection, the FLR may have a stabilizing or destabilizing effect, but a completely stabilizing one for a certain wave-number range. Similarly, the Hall currents may have a stabilizing or destabilizing effect but a completely stabilizing one for the same wave-number range under certain condition, whereas the medium permeability always has a destabilizing effect for stationary convection.

Thermal instability of a compressible plasma with finite Larmor radius

Physica B+C ◽  
1983 ◽  
Vol 122 (3) ◽  
pp. 341-347 ◽  
Author(s):  
R.C. Sharma ◽  
E. Nyland ◽  
K.P. Thakur
Keyword(s):  
Thermal Instability ◽  
Larmor Radius ◽  
Finite Larmor Radius ◽  
Compressible Plasma

Finite Larmor Radius and Compressibility Effects on Thermosolutal Instability of a Plasma

1986 ◽  
Vol 41 (5) ◽  
pp. 724-728
Author(s):  
R. C. Sharma ◽  
Neela Rani
Keyword(s):  
Necessary Conditions ◽  
Larmor Radius ◽  
Stationary Convection ◽  
Finite Larmor Radius ◽  
Compressible Plasma ◽  
Compressibility Effects ◽  
Solute Gradient

The thermosolutal instability of a compressible plasma due to the effects of the ion Larmor radius is considered. The system is found to be stable for (Cp/ g ) ß < 1. The finite Larm or radius and the compressibility introduce oscillatory modes in the system for (Cp /g) ß > 1. The compressibility, solute gradient and finite Larmor radius stabilize the stationary convection. The necessary conditions for overstability are also derived.

scholarly journals Thermal Instability in Plasma with Finite Larmor Radius

1975 ◽  
Vol 30 (4) ◽  
pp. 461-465
Author(s):  
R. C. Sharma ◽  
Kirti Prakash
Keyword(s):  
Magnetic Field ◽  
Thermal Instability ◽  
Larmor Radius ◽  
Stationary Convection ◽  
Horizontal Magnetic Field ◽  
Finite Larmor Radius ◽  
Stabilizing Effect

Abstract The effects of the finite Larmor radius of the ions on the thermal instability of a plasma are investigated. When the instability sets in as stationary convection, the finite Larmor radius is found to have a stabilizing effect. The conditions for the nonexistence of overstability are investigated. The case with horizontal magnetic field is discussed.

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