Transport properties of N2 and CO2 for nonequilibrium flows

Research output


The objective of this report is the investigation of transport and thermodynamic properties in nonequilibrium polyatomic gas with rotational and vibrational degrees of freedom. In Part I the modelling of transport processes in diatomic gas is presented, in Part II the three-atomic gas CO2 is considered. The method is based on kinetic equations for distribution functions. The theoretical formulas for pressure tensor and heat flux in nonequilibrium conditions are given. The practical algorithm of calculation of shear and bulk viscosity, heat conductivity and diffusion coefficients is developed. The results of the calculation of nonequilibrium specific heats and dissipative coefficients in N2 and CO2 are given in curves and tables for the temperature interval 300-10000K in N2, and 300-5000K in CO2. A comparison of the results of this study with the ones obtained on the basis of other models and in experiments is presented. The effect of rotational and vibrational excitation on transport properties is shown; and interpolating polynomials for the transport coefficients given in the tables are provided.

Original languageEnglish
JournalEuropean Space Agency (Scientific and Technical Reports) ESA STR
Issue number247
Publication statusPublished - 1 Mar 2005

Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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