Air Force Research Laboratory (AFMC) AFRL/RQRC Edwards AFB United States
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.
Journal Article - Open Access
Journal of Thermophysics and Heat Transfer, Articles in Advance , 01 Jan 0001, 01 Jan 0001, Approved for Public Release; Distribution Unlimited. PA Clearance Number: 17160 Clearance Date: 31 March 2017. The U.S. Government is joint author of the work and has the right to use, modify, reproduce, release, perform, display, or disclose the work. Journal article published in the Journal of Thermophysics and Heat Transfer, Articles in Advance; DOI: 10.2514/1.T5228. Publication Date (Web): 07 December 2017; Copyright 2017 by the American Institute of Aeronautics and Astronautics, Inc. Prepared in collaboration with ERC and Ohio State University