Gravitational instability of two streams in the presence of a uniform rotation and a uniform magnetic field

1972 ◽  
Vol 9 (1) ◽  
pp. 122-130
Author(s):  
R. S. Sengar ◽  
H. C. Khare
Keyword(s):  
Magnetic Field ◽  
Uniform Magnetic Field ◽  
Gravitational Instability ◽  
Uniform Rotation

Gravitational instability of a rotating partially-ionized plasma carrying a uniform magnetic field with hall effect

1993 ◽  
Vol 199 (2) ◽  
pp. 323-331 ◽  
Author(s):  
Vinod Kumar ◽  
Nagendra Kumar ◽  
Krishna M. Srivastava ◽  
R. C. Mittal
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Uniform Magnetic Field ◽  
Gravitational Instability ◽  
Partially Ionized

Inverse cascades in incompressible fluid and magnetofluid turbulence

1996 ◽  
Vol 56 (3) ◽  
pp. 467-491
Author(s):  
Murshed Hossain
Keyword(s):  
Magnetic Field ◽  
Incompressible Fluid ◽  
Uniform Magnetic Field ◽  
Spatial Scales ◽  
Three Dimensional ◽  
Self Organization ◽  
Anisotropic Fluid ◽  
Uniform Rotation ◽  
Fluid Turbulence ◽  
Turbulent Fluctuations

Absolute equilibrium statistical theory and numerical simulations are reviewed in the context of inverse cascades in two- and three-dimensional incompressible fluid and magnetofluid turbulence. Turbulent fluctuations of physically interesting quantities undergo inverse cascade to larger spatial scales, leading to self-organization under certain circumstances. In particular, most systems with more than one quadratic ideal invariant, or, having some kind of imposed anisotropy, exhibit inverse cascades. Anisotropic fluid turbulence in the presence of a uniform rotation and magnetofluid turbulence in the presence of a uniform magnetic field are considered.

scholarly journals On the Magnetogravitational Instability of a Ferromagnetic Dust Cloud in the Presence of Nonuniform Rotation

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Joginder S. Dhiman ◽  
Rekha Dadwal
Keyword(s):  
Magnetic Field ◽  
Uniform Magnetic Field ◽  
Gravitational Instability ◽  
Normal Mode Analysis ◽  
Dust Cloud ◽  
Mode Analysis ◽  
Analysis Method ◽  
General Dispersion ◽  
Nonuniform Rotation ◽  
Ferromagnetic Medium

The effect of a nonuniform magnetic field on the gravitational instability of a nonuniformly rotating infinitely extending axisymmetric cylinder in a homogenous ferromagnetic medium has been studied. The propagation of the wave is allowed along radial direction. A general dispersion relation, using the normal mode analysis method on the perturbation equations of the problem, is obtained. It is found that Bel and Schatzman criterion determines the gravitational instability of this general problem. Thus, it appears that the effect of non-uniform magnetic field on the gravitational instability as discussed by (Dhiman and Dadwal, 2010) is marginalized by the magnetic polarizability of ferrofluid.

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