Normal Mean Stress in Non-Equilibrium Viscous N-2/N Flows with Dissociation and Electronic Excitation

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Abstract

Stress tensor in viscous chemically non-equilibrium N-2/N flows with electronic excitation is studied. A one-temperature model of a flow with slow dissociation reaction taking into account translational, rotational, vibrational degrees of freedom as well as electronic states of both molecules and atoms is developed. The generalized Chapman-Enskog method is used to derive the closed set of governing equations and to evaluate the normal mean stress. The bulk viscosity and relaxation pressure are calculated in the temperature range 2000-10000 K for various mixture compositions. Various models for the dissociation cross section are used to calculate the relaxation pressure. The influence of mixture composition and electronic excitation on the normal mean stress is discussed.

Original languageEnglish
Title of host publication28TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS 2012, VOLS. 1 AND 2
EditorsM Mareschal, A Santos
PublisherAmerican Institute of Physics
Pages1086-1093
Number of pages8
DOIs
StatePublished - 2012
Event28th International Symposium on Rarefied Gas Dynamics (RGD) - Zaragoza, Spain
Duration: 9 Jul 201213 Jul 2012

Publication series

NameAIP Conference Proceedings
PublisherAMER INST PHYSICS
Volume1501
ISSN (Print)0094-243X

Conference

Conference28th International Symposium on Rarefied Gas Dynamics (RGD)
CountrySpain
CityZaragoza
Period9/07/1213/07/12

Keywords

  • Kinetic theory of transport processes
  • Transport coefficients
  • Normal mean stress
  • Electronic excitation
  • BULK VISCOSITY
  • VOLUME VISCOSITY

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