On the accuracy and reliability of different fluid models of the direct current glow discharge

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45 Citations (Scopus)

Abstract

We developed and tested 2D “extended fluid model” of a dc glow discharge using COMSOL MULTIPHYSICS software and implemented two different approaches. First, assembling the model from COMSOL’s general form pde’s and, second, using COMSOL’s built-in Plasma Module. The discharge models are based on the fluid description of ions and excited neutral species and use drift-diffusion approximation for the particle fluxes. The electron transport as well as the rates of electron-induced plasma-chemical reactions are calculated using the Boltzmann equation for the EEDF and corresponding collision cross-sections. The self-consistent electric field is calculated from the Poisson equation. Basic discharge plasma properties such as current-voltage characteristics and electron and ion spatial density distributions as well as electron temperature and electric field profiles were studied. While the solutions obtained by two different COMSOL models are essentially identical, the discrepancy between COMSOL and CFD-ACE+ model sol
Original languageEnglish
Pages (from-to)033502_1-12
JournalPhysics of Plasmas
Volume19
Issue number3
DOIs
Publication statusPublished - 2012

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glow discharges
direct current
fluids
electrons
electric fields
charge flow devices
assembling
Poisson equation
flux (rate)
plasma jets
density distribution
chemical reactions
ions
temperature distribution
modules
electron energy
computer programs
collisions
cross sections
electric potential

Cite this

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title = "On the accuracy and reliability of different fluid models of the direct current glow discharge",
abstract = "We developed and tested 2D “extended fluid model” of a dc glow discharge using COMSOL MULTIPHYSICS software and implemented two different approaches. First, assembling the model from COMSOL’s general form pde’s and, second, using COMSOL’s built-in Plasma Module. The discharge models are based on the fluid description of ions and excited neutral species and use drift-diffusion approximation for the particle fluxes. The electron transport as well as the rates of electron-induced plasma-chemical reactions are calculated using the Boltzmann equation for the EEDF and corresponding collision cross-sections. The self-consistent electric field is calculated from the Poisson equation. Basic discharge plasma properties such as current-voltage characteristics and electron and ion spatial density distributions as well as electron temperature and electric field profiles were studied. While the solutions obtained by two different COMSOL models are essentially identical, the discrepancy between COMSOL and CFD-ACE+ model sol",
keywords = "Boltzmann equation, glow discharges, plasma chemistry, plasma collision processes, plasma flow, plasma simulation, plasma transport processes, Poisson equation, vortices",
author = "I. Rafatov and E.A. Bogdanov and A.A. Kudryavtsev",
year = "2012",
doi = "DOI: 10.1063/1.3688875",
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TY - JOUR

T1 - On the accuracy and reliability of different fluid models of the direct current glow discharge

AU - Rafatov, I.

AU - Bogdanov, E.A.

AU - Kudryavtsev, A.A.

PY - 2012

Y1 - 2012

N2 - We developed and tested 2D “extended fluid model” of a dc glow discharge using COMSOL MULTIPHYSICS software and implemented two different approaches. First, assembling the model from COMSOL’s general form pde’s and, second, using COMSOL’s built-in Plasma Module. The discharge models are based on the fluid description of ions and excited neutral species and use drift-diffusion approximation for the particle fluxes. The electron transport as well as the rates of electron-induced plasma-chemical reactions are calculated using the Boltzmann equation for the EEDF and corresponding collision cross-sections. The self-consistent electric field is calculated from the Poisson equation. Basic discharge plasma properties such as current-voltage characteristics and electron and ion spatial density distributions as well as electron temperature and electric field profiles were studied. While the solutions obtained by two different COMSOL models are essentially identical, the discrepancy between COMSOL and CFD-ACE+ model sol

AB - We developed and tested 2D “extended fluid model” of a dc glow discharge using COMSOL MULTIPHYSICS software and implemented two different approaches. First, assembling the model from COMSOL’s general form pde’s and, second, using COMSOL’s built-in Plasma Module. The discharge models are based on the fluid description of ions and excited neutral species and use drift-diffusion approximation for the particle fluxes. The electron transport as well as the rates of electron-induced plasma-chemical reactions are calculated using the Boltzmann equation for the EEDF and corresponding collision cross-sections. The self-consistent electric field is calculated from the Poisson equation. Basic discharge plasma properties such as current-voltage characteristics and electron and ion spatial density distributions as well as electron temperature and electric field profiles were studied. While the solutions obtained by two different COMSOL models are essentially identical, the discrepancy between COMSOL and CFD-ACE+ model sol

KW - Boltzmann equation

KW - glow discharges

KW - plasma chemistry

KW - plasma collision processes

KW - plasma flow

KW - plasma simulation

KW - plasma transport processes

KW - Poisson equation

KW - vortices

U2 - DOI: 10.1063/1.3688875

DO - DOI: 10.1063/1.3688875

M3 - Article

VL - 19

SP - 033502_1-12

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 3

ER -