Abstract
In the research field of acoustic propagation in excitable gases, one of the most critical parameters is the vibrational relaxation time, which determines the frequency of the acoustic dispersion step or the absorption maximum. In this paper, the vibrational relaxation equations given by Tanczos [J. Chem. Phys. 25, 439 (1956)] have been applied to calculate the vibrational multi-relaxation times in multi-component gases. The eigenvalues of the energy-transition-rate matrix are proven to be the reciprocals of the multi-relaxation times. Comparisons demonstrate that our relaxation frequencies calculated for various gas compositions, including carbon dioxide, methane, chlorine, nitrogen, and oxygen, agree with the experimental data.
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Zhang, KS., Ou, W., Jiang, X. et al. Calculation of vibrational relaxation times in multi-component excitable gases. Journal of the Korean Physical Society 65, 1028–1035 (2014). https://doi.org/10.3938/jkps.65.1028
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DOI: https://doi.org/10.3938/jkps.65.1028