Accession Number : AD1046037

Title :   Direct Simulation Monte Carlo Application of the Three Dimensional Forced Harmonic Oscillator Model

Descriptive Note : Journal Article - Open Access

Corporate Author : Air Force Research Laboratory (AFMC) AFRL/RQRC Edwards AFB United States

Personal Author(s) : Gimelshein, Sergey F ; Wysong,Ingrid J ; Adamovich,Igor V

Full Text :

Report Date : 07 Dec 2017

Pagination or Media Count : 11

Abstract : 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.

Descriptors :   Oscillators , simulation , monte carlo method , MOLECULE MOLECULE INTERACTIONS , energy transfer

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE