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Journal of Applied Physics / Volume 107 / Issue 9 / ARTICLES / Plasmas and Electrical Discharges

J. Appl. Phys. 107, 093304 (2010); http://dx.doi.org/10.1063/1.3374711 (11 pages)

Simulations of direct-current air glow discharge at pressures ∼ 1 Torr: Discharge model validation

Shankar Mahadevan and Laxminarayan L. Raja

The University of Texas at Austin, Austin, Texas 78712, USA

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(Received 4 September 2009; accepted 8 March 2010; published online 6 May 2010)

Computational simulations of air glow discharge phenomena in the pressure range typical of plasma actuator applications for high speed flow control are presented. The model is based on a self-consistent, multispecies, and multitemperature continuum description of the plasma. A reduced air plasma model suitable for multidimensional simulations with 11 species and 21 gas phase chemical reactions is validated against experimental results in the literature. The discharge model predicts experimentally observed glow mode discharge operation, the current-voltage characteristics of the discharge, and spatial profiles of the electron temperature and positive ion number densities. For pressures of order 1 Torr, O2+ and N2+ are the dominant positive ion species in the discharge, and the concentration of O− negative ion is comparable to electron concentration. The two-dimensional structure of the discharge is predicted by the model is found to be in agreement with qualitative observations from the experiments.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. DESCRIPTION OF THE PLASMA SOLVER
    1. Governing equations
    2. Boundary conditions
      1. Species continuity equations
      2. Potential equation
      3. Electron energy equation
    3. Air plasma chemistry and transport
    4. Spatial and temporal discretization
  3. RESULTS AND DISCUSSION
  4. ADDITIONAL COMMENTS
  5. CONCLUSIONS

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KEYWORDS and PACS

Keywords

glow discharges, plasma chemistry, plasma collision processes, plasma density, plasma simulation, plasma temperature

PACS

  • 52.80.Hc

    Glow; corona

  • 52.65.-y

    Plasma simulation

  • 82.33.Xj

    Plasma reactions (including flowing afterglow and electric discharges)

  • 52.20.Hv

    Atomic, molecular, ion, and heavy-particle collisions

  • 52.25.-b

    Plasma properties

  • 52.20.Fs

    Electron collisions

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3374711

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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