An implementation of the three-dimensional forced harmonic oscillator model of vibration–translation energy transfer in atom–diatom and diatom–diatom collisions is proposed. The implementation employs precalculated lookup tables for transition probabilities and is suitable for the direct simulation Monte Carlo method. It takes into account the microscopic reversibility between the excitation and deexcitation processes, and it satisfies the detailed balance requirement at equilibrium. The implementation is verified for oxygen and nitrogen thermal heat baths and validated for aftershock relaxation of oxygen in argon. Comparison with the one-dimensional forced harmonic oscillator model shows large differences in macroparameters for high-temperature bath relaxation and moderate-to-large differences in realistic oxygen shock conditions.
Application of the 3D Forced Harmonic Oscillator Model in the DSMC Method
Journal of Thermophysics and Heat Transfer ; 32 , 4 ; 882-891
2018-10-01
Article (Journal)
Electronic Resource
English
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