Effect of neutral collision and radiative heat-loss function on self-gravitational instability of viscous thermally conducting partially-ionized plasma

Journal Article · Sat Dec 15 04:00:00 EST 2012 · AIP Advances

DOI:https://doi.org/10.1063/1.4773348· OSTI ID:22107649

Kaothekar, Sachin ^[1]; Soni, Ghanshyam D. ^[2]; Chhajlani, Rajendra K. ^[1]

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1. School of Studies in Physics, Vikram University, Ujjain-456010, Madhya Pradesh (India)
2. Government Girls Degree College, Dewas, Madhya Pradesh (India)

The problem of thermal instability and gravitational instability is investigated for a partially ionized self-gravitating plasma which has connection in astrophysical condensations. We use normal mode analysis method in this problem. The general dispersion relation is derived using linearized perturbation equations of the problem. Effects of collisions with neutrals, radiative heat-loss function, viscosity, thermal conductivity and magnetic field strength, on the instability of the system are discussed. The conditions of instability are derived for a temperature-dependent and density-dependent heat-loss function with thermal conductivity. Numerical calculations have been performed to discuss the effect of various physical parameters on the growth rate of the gravitational instability. The temperature-dependent heat-loss function, thermal conductivity, viscosity, magnetic field and neutral collision have stabilizing effect, while density-dependent heat-loss function has a destabilizing effect on the growth rate of the gravitational instability. With the help of Routh-Hurwitz's criterion, the stability of the system is discussed.

• OSTI ID: 22107649
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 4 Vol. 2; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COLLISIONS
DENSITY
DISPERSION RELATIONS
FUNCTIONS
GRAVITATIONAL INSTABILITY
HEAT LOSSES
MAGNETIC FIELDS
NORMAL-MODE ANALYSIS
NUMERICAL ANALYSIS
PLASMA DENSITY
STABILITY
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY
THERMODYNAMICS
VISCOSITY