Rayleigh–Taylor/gravitational instability in dense magnetoplasmas

Ali, S.; Ahmed, Zeeshan; Mirza, Arshad M.; Ahmad, Ishaq

doi:10.1016/j.physleta.2009.06.021

Cited by 20 publications

(9 citation statements)

References 29 publications

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“…The effects of magnetic field on the RTI in quantum plasmas with para-and ferromagnetic properties have been considered by Mikhail et al [32].The effect of quantum term on RTI of stratified plasma layer through porous medium is studied by Hoshoudy [33]. The RTI is investigated in a non-uniform dense quantum magneto-plasma by Ali et al [34].…”

Section: Bmentioning

confidence: 99%

Quantum Effects on the Rayleigh-Taylor Instability of Viscoelastic Plasma Model through a Porous Medium

Hoshoudy¹

2011

JMP

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The stability of stratified of incompressible, viscoelastic plasma through a porous medium in the presence of the quantum mechanism is considered. The dispersion relation is obtained using the normal mode technique. The behavior of growth rate with respect to the quantum effect, strain retardation time and stress relaxation time are examined in the presence of porosity of the porous medium, the medium permeability, kinematic viscosity. It is shown that, the presence of quantum term stabilizes a certain wave number band, whereas the system is unstable for all wave numbers in the absence of quantum term. The considered parameters beside the quantum term will bring about more stability on the considered system

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Section: Bmentioning

confidence: 99%

Quantum Effects on the Rayleigh-Taylor Instability of Viscoelastic Plasma Model through a Porous Medium

Hoshoudy¹

2011

JMP

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“…If we ignore the positron concentration i.e. 0 p = then we get exactly dispersion relation of RT in electron-ion quantum magneto plasma of [37] i.e. …”

Section: Dispersion Relation and Ert Instabilitymentioning

confidence: 94%

“…The RT instability in vertical/horizontal inhomogeneous rotating plasma with quantum effects is investigated by [35] [36]. The electrostatic RT instability is studied in a dense electron-ion quantum magnetoplasma [37], where ions are assumed cold and classical while electrons are dense and quantum mechanical. It has shown that density gradient and quantum speed significantly modify the RT instability growth rate.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Rayleigh-Taylor Mode in Electron-Positron-Ion Quantum Plasma

Ali¹,

Ahmad²

2017

JMP

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Electrostatic Rayleigh-Taylor (ERT) mode/instability is studied in a non-uniform quantum magnetoplasma, whose constituents are electrons and positrons with fraction of ions. The effects of quantum corrections (i.e. Bohm potential and temperature degeneracy) and magnetic field on ERT mode are investigated with astrophysical plasma application. A generalized dispersion relation is deduced under the drift wave approximation. The presence of positron makes the dispersion relation a cubic equation. Different roots of both real and imaginary parts of the RT mode are examined by applying the Cardano's method of solving the cubic equation. The dispersion relation and the growth rates of RT instability are examined both analytically and numerically with effects of electron and positron density, and magnetic field variations. It is shown that the magnetic field and positron density have stabilizing effectuates on ERT mode while due to electron density the mode becomes unstable. The present work is anticipated to be of physical relevance in the studies of laboratory laser-produced plasmas as well as in the study of compact magnetized astrophysical objects like white dwarfs.

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“…A range of classical subject such as waves and stream instability (as Jeans instability [20] and Rayleigh-Taylor instability [3,4]) were studied again in quantum plasmas system. Currently, there are many studies on hydrodynamic instabilities in quantum plasmas, in particular RTI [21][22][23][24][25][26][27][28][29][30]. For example, the quantum effects on the internal waves and the RTI in plasma is studied by Bychkov et al [21].…”

Section: Introductionmentioning

confidence: 99%

“…RTI in quantum plasmas with para-and ferromagnetic properties is studied by Modestov et al [27]. The effect of quantum term on RTI of stratified plasma layer through porous medium is studied by Hoshoudy [28,29].The RTI is studied in a non-uniform dense quantum magneto-plasma by Ali et al [30].…”

Section: Introductionmentioning

confidence: 99%

External Magnetic Field Effects on the Rayleigh-Taylor Instability in an Inhomogeneous Rotating Quantum Plasma

Hoshoudy¹

2012

JMP

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The effects of external magnetic field effects on the Rayleigh-Taylor instability in an inhomogeneous stratified quantum plasma rotating uniformly are investigated. The external magnetic field is considered in both horizontal and vertical direction. The linear growth rate is derived for the case where a plasma with exponential density distribution is confined between two rigid planes at 0 z  and , by solving the linear QMHD equations into normal mode. Some special cases are particularized to explain the roles that play the variables of the problem. The results show that, the presence of both external horizontal and vertical magnetic field beside the quantum effect will bring about more stability on the growth rate of unstable configuration. The maximum stability will happen in the case of wave number parallels to or in the same direction of external horizontal magnetic field.

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Rayleigh–Taylor/gravitational instability in dense magnetoplasmas

Cited by 20 publications

References 29 publications

Quantum Effects on the Rayleigh-Taylor Instability of Viscoelastic Plasma Model through a Porous Medium

Quantum Effects on the Rayleigh-Taylor Instability of Viscoelastic Plasma Model through a Porous Medium

Electrostatic Rayleigh-Taylor Mode in Electron-Positron-Ion Quantum Plasma

External Magnetic Field Effects on the Rayleigh-Taylor Instability in an Inhomogeneous Rotating Quantum Plasma

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