Abstract
In this chapter, we study a linear sound wave in a rarefied polyatomic gas in equilibrium with the aim of clarifying the validity and the features of the ET14 theory established in Chap. 5 We derive the dispersion relations on the basis of the ET14 theory and of the classical Navier-Stokes Fourier (NSF) theory. Comparison of these relations with experimental data reveals clearly the superiority of the ET14 theory to the NSF theory. We confine our analysis within sound waves in some rarefied diatomic gases (hydrogen, deuterium, and hydrogen deuteride gases) because suitable experimental data are scarce and are mainly restricted to rarefied gases. We also evaluate the relaxation times, and the shear and bulk viscosities and the heat conductivity of the gases.
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Ruggeri, T., Sugiyama, M. (2015). Linear Wave in a Polyatomic Gas. In: Rational Extended Thermodynamics beyond the Monatomic Gas. Springer, Cham. https://doi.org/10.1007/978-3-319-13341-6_7
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DOI: https://doi.org/10.1007/978-3-319-13341-6_7
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