High temperature transport coefficients in e/C/H/N/O mixtures

International audienceThe knowledge of transport coefficients is of interest in the modelling of flow in plasma processes and heat transfer. Calculations are performed in the temperature range of 9000–20 000 K and for different pressures (1, 3, 6 and 10 bar). The composition of e/C/H/N/O mixture plasmas is determined at equilibrium and four examples are studied: H2O, CO2, CO–H2O and CH4–air plasmas. First, the most recent data of potential interactions or elastic differential cross sections are carefully examined in order to choose the most appropriate ones to determine the collision integrals. Second, in this study devoted to high temperature calculations, we have restricted the species number to 12 (only atoms and atomic ions). Then we have tested the validity of our calculated composition and deduced that our transport properties are available for the temperature range of 9000–20 000 K at p = 1 bar and 11 000–20 000 K at p = 10 bar. Finally, the electrical conductivity, the viscosity and the total thermal conductivity are calculated for the four compositions and different pressures