Numerical Method and Composition at and out of Chemical Equilibrium in a Multitemperature Plasma. Application to a Pure Nitrogen Plasma

The disequilibrium between the temperatures (excitation, rotation, vibration, translation) in plas- mas lead us to specific chemical potentials. Then, they are used to develop a mass action law in a multitemperaturc plasma. This mass action law enables us to determine the composition of a pure nitrogen mixture out of thermal equilibrium. The composition evolution versus time is determined from a kinetic method modified to take into account different temperature hypotheses. The composition and different thermodynamic properties of a pure nitrogen mixture are given at the chemical equilibrium, then versus time for various temperature hypotheses and thermal disequi- libriums