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Title: Two-dimensional hybrid Monte Carlo–fluid modelling of dc glow discharges: Comparison with fluid models, reliability, and accuracy

Two-dimensional hybrid Monte Carlo–fluid numerical code is developed and applied to model the dc glow discharge. The model is based on the separation of electrons into two parts: the low energetic (slow) and high energetic (fast) electron groups. Ions and slow electrons are described within the fluid model using the drift-diffusion approximation for particle fluxes. Fast electrons, represented by suitable number of super particles emitted from the cathode, are responsible for ionization processes in the discharge volume, which are simulated by the Monte Carlo collision method. Electrostatic field is obtained from the solution of Poisson equation. The test calculations were carried out for an argon plasma. Main properties of the glow discharge are considered. Current-voltage curves, electric field reversal phenomenon, and the vortex current formation are developed and discussed. The results are compared to those obtained from the simple and extended fluid models. Contrary to reports in the literature, the analysis does not reveal significant advantages of existing hybrid methods over the extended fluid model.
Authors:
;  [1] ;  [2]
  1. Department of Physics, Middle East Technical University, Ankara (Turkey)
  2. Saint Petersburg State University, St.Petersburg (Russian Federation)
Publication Date:
OSTI Identifier:
22410274
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; ARGON; CATHODES; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; DIFFUSION; ELECTRIC CONDUCTIVITY; ELECTRIC FIELDS; ELECTRONS; FLOW MODELS; GLOW DISCHARGES; IONIZATION; MATHEMATICAL SOLUTIONS; MONTE CARLO METHOD; PLASMA; POISSON EQUATION; TWO-DIMENSIONAL CALCULATIONS; VORTICES