Simulations of CO2 multi-temperature vibrational kinetics on the basis of new relaxation time models

Vibrational relaxation of a single-component carbon dioxide in adiabatic thermal bath is studied in multi-temperature approaches using several models for the vibrational relaxation time. The energy production terms in two- and three-temperature vibrational energy relaxation equations are written in...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2021-07, Vol.1959 (1)
Main Authors: Kosareva, A, Kustova, E, Mekhonoshina, M
Format: Article
Language:English
Subjects:
Carbon dioxide
Harmonic oscillators
Perturbation theory
Relaxation time
Thermal baths
Transition probabilities
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Vibrational relaxation of a single-component carbon dioxide in adiabatic thermal bath is studied in multi-temperature approaches using several models for the vibrational relaxation time. The energy production terms in two- and three-temperature vibrational energy relaxation equations are written in the frame of the common Landau-Teller model as well using corrections based on introducing multi-temperature relaxation times for various vibrational energy exchanges within and between CO2 modes. For the relaxation time evaluation, two theoretical models for the transition probabilities are implemented: the first-order perturbation theory and the forced harmonic oscillator model; several experimental data sets are also assessed. It is shown that the forced harmonic oscillator model provides satisfactory agreement with experimental relaxation times in a wide temperature range. Solutions obtained using the two theoretical models for the transition probabilities show essentially different trends, incubation time and relaxation rate.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1959/1/012030