Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
The study is devoted to the evaluation of vibrational relaxation times in carbon dioxide using the kinetic theory methods. There are several relaxation channels in CO2, such as vibrational-translational energy transitions within modes and vibrational-vibrational exchanges between different modes. The theoretical expressions for the relaxation times of such processes are derived; they depend on the energy variation in a specific collision and cross sections of corresponding transitions. The first-order perturbation theory as well as two modifications of the forced harmonic oscillator (FHO) model are implemented for the transition probabilities. Relaxation times are evaluated in the temperature range 500-10000 K; it is shown that they are strongly affected by the cross section model. It is found that the FHO model provides good agreement with experimental data at low and moderate temperatures; at high temperatures, both models give non-monotonic trends for the relaxation times. The reasons of such behaviour are analysed.
Translated title of the contribution | Расчет времени колебательной релаксации в углекислом газе с использованием модели нагруженного гармонического осциллятора |
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Original language | English |
Title of host publication | International Conference on the Methods of Aerophysical Research, ICMAR 2020 |
Editors | Vasily M. Fomin, Alexander Shiplyuk |
Publisher | American Institute of Physics |
Pages | 96-97 |
ISBN (Electronic) | 9780735440999 |
DOIs | |
State | Published - 24 May 2021 |
Event | 20th International Conference on the Methods of Aerophysical Research, ICMAR 2020 - Akademgorodok, Novosibirsk, Russian Federation Duration: 1 Nov 2020 → 7 Nov 2020 |
Name | AIP Conference Proceedings |
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Volume | 2351 |
ISSN (Print) | 0094-243X |
ISSN (Electronic) | 1551-7616 |
Conference | 20th International Conference on the Methods of Aerophysical Research, ICMAR 2020 |
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Country/Territory | Russian Federation |
City | Akademgorodok, Novosibirsk |
Period | 1/11/20 → 7/11/20 |
ID: 70965475