Abstract
A new rotational energy transfer model for polyatomic molecules in nonequilibrium rarefied gas flow is proposed in this paper. The model is based on dynamic molecular collision (DMC) model for diatomic molecules. The classical trajectory calculation (CTC) is conducted to simulate a large number of binary collision in various conditions. The pair potential is used for intermolecular one, and molecules are regarded as rigid rotors. The outcomes are separated into inelastic collisions and elastic ones. The inelastic collisios are analyzed statistically to represent the rotational energy transfer. We found a probability density function of energy transfer is expressed by exponential law as in the DMC model.
