Larmor radius effect on Rayleigh-Taylor instability of a partially ionized plasma in composite medium

1993 ◽  
Vol 73 (2-4) ◽  
pp. 153-163
Author(s):  
K. Prakash ◽  
S. Manchanda
Keyword(s):  
Taylor Instability ◽  
Composite Medium ◽  
Larmor Radius ◽  
Rayleigh Taylor Instability ◽  
Partially Ionized

Rayleigh-Taylor Instability of a Stratified Plasma

1974 ◽  
Vol 29 (3) ◽  
pp. 518-523 ◽  
Author(s):  
K. M. Srivastava
Keyword(s):  
Magnetic Field ◽  
Boussinesq Approximation ◽  
Short Wave ◽  
Taylor Instability ◽  
Larmor Radius ◽  
Finite Larmor Radius ◽  
Wave Disturbances ◽  
Magnetic Field Gradients ◽  
Rayleigh Taylor Instability ◽  
The Magnetic Field

We have investigated the effect of finite Larmor radius on the Rayleigh-Taylor instability of a semi-infinite, compressible, stratified and infinitely conducting plasma. The plasma is assumed to have a one dimensional density and magnetic field gradients. The eigenvalue problem has been solved under Boussinesq approximation for disturbances parallel to the magnetic field. It has been established that for perturbation parallel to the magnetic field, the system is stable for both stable and unstable stratification. For perturbation perpendicular to the magnetic field, the problem has been solved without Boussinesq approximation. The dispersion relation has been discussed in the two limiting cases, the short and long wave disturbances. It has been observed that the gyroviscosity has a destabilizing influence from k = 0 to k = 4.5 for ß* = 0.1 and for ß* = 0.1 up to k* = 2.85 and then onwards it acts as a stabilizing agent. It has a damping effect on the short wave disturbances. For some parameters, the largets imaginary part has been shown in Figs. 1 and 2

The large-Larmor-radius Rayleigh–Taylor instability

1998 ◽  
Vol 60 (1) ◽  
pp. 65-68
Author(s):  
M. FAGHIHI ◽  
F. EBRAHIMI
Keyword(s):  
Growth Rate ◽  
Fluid Model ◽  
Taylor Instability ◽  
Larmor Radius ◽  
Rayleigh Taylor Instability ◽  
Magnetohydrodynamic Model ◽  
Ideal Magnetohydrodynamic ◽  
The Ideal

The effect of a large ion Larmor radius on the Rayleigh–Taylor instability is investigated using the Vlasov fluid model. The results are compared with an ideal magnetohydrodynamic model. It is found that this effect reduces the growth rate of the Rayleigh–Taylor instability with respect to the ideal magnetohydrodynamic growth rate.

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