Radiative-condensation instability in gravitating strongly coupled dusty plasma with polarization force

Prajapati, R. P.; Bhakta, Subrata

doi:10.1007/s10509-015-2328-1

Cited by 11 publications

(4 citation statements)

References 55 publications

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“…Thus we obtain a relation for perturbed dust density from equations ( 14)-( 17 b r r = / is the ratio of neutral density to dust density. The dispersion relation (18) shows the perturbed density of dust. Now to obtain the perturbed density of electron we eliminate T e1 from equations (12) and ( 13)…”

Section: Linearized Perturbation Equations and Dispersion Relationmentioning

confidence: 99%

“…Recently, Prajapati and Bhakta [17] have studied the effect of dust polarization force and dust charge fluctuation on RC instability of a self-gravitating magnetized dusty plasma system. The RC instability has been investigated by Prajapati and Bhakta [18] in a strongly coupled dusty plasma taking into consideration the effects of polarization force and self-gravitation. In their work they have derived the dispersion relation in limiting cases considering dust fluid motion in y-direction and magnetic field in zdirection so that the force acts in x-direction.…”

Section: Introductionmentioning

confidence: 99%

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Radiative condensation instability in partially ionized dusty plasma with polarization force

Sharma¹,

Jain²

2015

Phys. Scr.

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This paper studies the effect of polarization force on the radiative condensation (RC) instability of a partially ionized dusty medium both in the presence and absence of self-gravitation. The temperature and density dependent heat loss function is considered in the process of heating and radiative cooling. The linear-perturbation analysis is used to derive general dispersion relation and criteria for both the Jeans and RC instability. The condition of Jeans instability is modified due to the RC, polarization force, magnetic field and dust thermal speed, whereas in the case of RC instability the instability criterion is modified due to the presence of dust thermal speed, magnetic field and polarization force. The effects of various parameters have been numerically estimated on RC instability. It is clear from figure that the presence of polarization parameter and density dependent heat-loss function destabilize the system while the presence of temperature dependent heat-loss function, dust neutral collision frequency and ratio of neutral dust density stabilize the system. These findings are relevant for many areas of space and laboratory plasma research prime examples being the formation of dense molecular clouds in interstellar and intergalactic medium, condensations in planetary nebulae and in laboratory plasmas like tokamak edge plasma.

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Section: Linearized Perturbation Equations and Dispersion Relationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Radiative condensation instability in partially ionized dusty plasma with polarization force

Sharma¹,

Jain²

2015

Phys. Scr.

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“…[17] Prajapati et al have reported the stabilizing effect of visco elastic coefficient and dust thermal velocity and destabilizing impact of polarization force on the growth rate of the jeans mode. [18] In the present paper an analytical expression for growth rate of Jeans mode is derived using equations of Generalized Hydrodynamics model. The effective dust pressure is invoked in the model to take into account the electrostatic repulsion among the dust grains.…”

Section: Introductionmentioning

confidence: 99%

Jeans Instability of Self Gravitating Dust Cloud in Presence of Effective Electrostatic Pressure

Bezbaruah¹,

Das²,

Borah³

et al. 2018

Commun. Theor. Phys.

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The role of viscosity coefficient (η ′ ), coulomb coupling parameter (Γ) and dust mass on the growth of jeans mode is investigated in strongly coupled dusty plasma using equations of Generalized Hydrodynamics (GH) Model. The novel aspect of this work is that the force arising due to electrostatic pressure caused by grain grain interaction has been included in the dynamics of dust particles. This force is found to play a significant role in counter balancing the self gravity effect, thereby reducing the growth rate of jeans instability. The present work may provide more physical insight in understanding the mechanisms behind formation of planetesimals, stars etc.

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“…Prajapati 39) investigated the Jeans instability of the self-gravitating dusty plasmas under the polarization force. Prajapati and Bhakta 40) shown that the polarization force will destabilize radiative-condensation instability in gravitating strongly coupled dusty plasma. Very recently, Mayout et al 41) shown that the DA soliton energy decreases with an increase of plasma-dust particles polarization interaction and when the magnitude of the polarization force approaches the one of the electrical force, i.e., the net force acting on the grains decreases, the energy experiences a depletion.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dust acoustic waves with polarization force effects in Kappa distribution plasma

Chen

Zhou

Luo

et al. 2016

Jpn. J. Appl. Phys.

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The propagation characteristics of dust acoustic solitary waves (DASWs) in dusty plasmas with the effects of polarization force and superthermal ions are studied. First, the polarization force induced by superthermal ions is obtained. It is shown that the superthermality of background ions affect the Debye screening of dust grains as well as the polarization force significantly. Then for small amplitude solitary waves, the KdV equation is obtained by applying the reductive perturbation technique. And for the arbitrary amplitude solitary waves, the Sagdeev potential method is employed and the Sagdeev potential is analyzed. In both case, the effects of the polarization force associated the ions’ superthermality on the characteristic of the DASWs are analyzed.

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Radiative-condensation instability in gravitating strongly coupled dusty plasma with polarization force

Cited by 11 publications

References 55 publications

Radiative condensation instability in partially ionized dusty plasma with polarization force

Radiative condensation instability in partially ionized dusty plasma with polarization force

Jeans Instability of Self Gravitating Dust Cloud in Presence of Effective Electrostatic Pressure

Nonlinear dust acoustic waves with polarization force effects in Kappa distribution plasma

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