Anomalous kinetic energy of a system of dust particles in a gas discharge plasma

Norman, G. É.; Stegaĭlov, V. V.; Тимофеев, А. В.

doi:10.1134/s1063776111130073

Cited by 22 publications

(13 citation statements)

References 37 publications

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“…The coefficient affects the shear viscosity. The main reason is that the coefficient of the frictional force grows as the temperature decreases [5,6]. Therefore, due to the decrease of the temperature, the shear viscosity coefficient rises.…”

Section: Dusty Plasmamentioning

confidence: 99%

“…The equation of dusty particles motion [5,6] takes into account the following effects: the features of gas discharge near-electrode layer, dust particle charge fluctuations, the dependence of the dust particle charge on distance from electrode, and distance from other dust particles. The trajectories of each particle are obtained using the following equation:…”

Section: Particle Trajectoriesmentioning

confidence: 99%

“…Each segment is chosen to be statistically independent [2] and the coefficient is found for each of them. The ensemble averaging is substituted for the time averaging over reference times in the equations (2), (4) - (6).…”

Section: Simulationmentioning

confidence: 99%

“…Motion equations are presented in section 3, which are used to get trajectories of particles. A particular attention is paid to dusty plasmas where motion equations have a unique form [5,6]. Section 4 is devoted to some simulation details of the molecular dynamics method.…”

Section: Introductionmentioning

confidence: 99%

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Viscosity calculations at molecular dynamics simulations

Kirova

Norman

2015

J. Phys.: Conf. Ser.

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Abstract. Viscosity and diffusion are chosen as an example to demonstrate the universality of diagnostics methods in the molecular dynamics method. To emphasize the universality, three diverse systems are investigated, which differ from each other drastically: liquids with embedded atom method and pairwise interatomic interaction potentials and dusty plasma with a unique multiparametric interparticle interaction potential. Both the Einstein-Helfand and Green-Kubo relations are used. Such a particular process as glass transition is analysed at the simulation of the aluminium melt. The effect of the dust particle charge fluctuation is considered. The results are compared with the experimental data.

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Section: Dusty Plasmamentioning

confidence: 99%

Section: Particle Trajectoriesmentioning

confidence: 99%

Section: Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Viscosity calculations at molecular dynamics simulations

Kirova

Norman

2015

J. Phys.: Conf. Ser.

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“…Furthermore, horizontal and vertical kinetic energy of the dust particles may be different [3][4][5][6][15][16][17][18]. So phenomenon and mechanisms of an energy transfer between degrees of freedom of a dusty plasma system are of great interest in the field of dusty plasma.…”

Section: Introductionmentioning

confidence: 99%

Energy transfer between degrees of freedom of a dusty plasma system

Semyonov

Тимофеев

2016

J. Phys.: Conf. Ser.

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Abstract. Dust particles under certain conditions can acquire kinetic energy of the order of 10 eV and higher, far above the temperature of gas and temperatures of ions and electrons in the discharge. Such heating can be explained by the energy transfer between degrees of freedom of a dusty plasma system. One of the mechanisms of such energy transfer is based on parametric resonance. A model of dust particles system in gas discharge plasma including fluctuations of dust particles charge and features of near-electrode layer is presented. Molecular dynamics simulation of the dust particles system is performed. Conditions of the resonance occurrence are obtained for a wide range of parameters.

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Intrinsic fluctuations of dust grain charge in multi-component plasmas

Shotorban

2014

Physics of Plasmas

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A master equation is formulated to model the states of the grain charge in a general multi-component plasma, where there are electrons and various kinds of positive or negative ions that are singly or multiply charged. A Fokker-Planck equation is developed from the master equation through the system-size expansion method. The Fokker-Planck equation has a Gaussian solution with a mean and variance governed by two initialvalue differential equations involving the rates of the attachment of ions and electrons to the dust grain. Grain charging in a plasma containing electrons, protons and alpha particles with Maxwellian distributions is considered as an example problem. The Gaussian solution is in very good agreement with the master equation solution numerically obtained for this problem.

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Anomalous kinetic energy of a system of dust particles in a gas discharge plasma

Cited by 22 publications

References 37 publications

Viscosity calculations at molecular dynamics simulations

Viscosity calculations at molecular dynamics simulations

Energy transfer between degrees of freedom of a dusty plasma system

Intrinsic fluctuations of dust grain charge in multi-component plasmas

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