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The Recombination of Ionized Species in Supersonic Flows

  • P. Vervisch
  • A. Bourdon
Chapter
Part of the NATO ASI Series book series (ASIC, volume 482)

Abstract

When charged particles are present the modeling of a supersonic or hypersonic flow remains a difficult issue. The evaluation of charged particles concentration requires a knowledge of numerous coupled elementary processes and a microscopic description more detailed than for neutral particles. The specificity of ionized flows is coming from the electric nature of charged particles and the weakness of the electron mass. The Poisson equation links strongly together electrons and ions and the Debye length is the scale length below which average charge neutrality cannot be guaranteed. Then if the collisional mean free path is greater than the Debye length, the simulation grid point and the fluid particle of the continuum description are within a neutral medium. This neutral assumption has consequences on the expression of conservation equations (ambipolar regime) and transport coefficients.

Keywords

Electron Temperature Transport Coefficient Electron Energy Distribution Function Vibrational Temperature Nitrogen Plasma 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • P. Vervisch
    • 1
  • A. Bourdon
    • 1
  1. 1.CNRS URA 230 - CORIAUniversity of RouenFrance

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