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Relaxation, propagation of sound, and transfer processes in molecular gases

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Abstract

Taking account of rotational and vibrational degrees of freedom of the molecules, a system of equations has been obtained for a molecular gas which describes slightly nonequilibrium states with a length and time on the order of magnitude of the length and time of the rotational and vibrational relaxation. By solving this system, which describes the propagation of sound and the transfer process, the absorption coefficient, the dispersion of the velocity of sound, the transfer coefficients (in particular, the thermal conductivity coefficient), and an expression for the total tensor of the pressures have been found and analyzed.

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  1. Sverdlovsk

    M. Ya. Alievskii

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  1. M. Ya. Alievskii
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Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 53–67, September–October, 1970.

The author thanks V. M. Zhdanov for his valuable advice and remarks, and also Yu, Ya. Polyak and B. M. Chistoserdov for their useful evaluations.

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Alievskii, M.Y. Relaxation, propagation of sound, and transfer processes in molecular gases. Fluid Dyn 5, 758–769 (1970). https://doi.org/10.1007/BF01017293

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  • DOI: https://doi.org/10.1007/BF01017293

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