A Study of Linear Waves Based on Extended Thermodynamics for Rarefied Polyatomic Gases

被引：0
作者：
Takashi Arima
Shigeru Taniguchi
Tommaso Ruggeri
Masaru Sugiyama
机构：
[1] Kanagawa University,Department of Mechanical Engineering, Faculty of Engineering
[2] Kitakyushu National College of Technology,Department of Control and Information Systems Engineering
[3] University of Bologna,Department of Mathematics & Research Center of Applied Mathematics (CIRAM)
来源：
Acta Applicandae Mathematicae | 2014年 / 132卷
关键词：
Extended thermodynamics; Rarefied polyatomic gas; Dispersion relation for sound; Phase velocity and absorption; Bulk viscosity; Relaxation time; 76J20; 82C35; 76N15; 76P05;
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摘要：
We study the dispersion relation for sound in rarefied polyatomic gases basing on the recently developed theory of extended thermodynamics (ET) for both dense and rarefied polyatomic gases. For hydrogen and deuterium gases in a wide temperature range where the rotational and vibrational modes in a molecule play a role, we compare the dispersion relations with those obtained in experiments and by the classical Navier–Stokes Fourier theory. From the comparison with experiments, we estimate the bulk viscosity and evaluate its temperature dependence. We study the characteristics of attenuation in a gas which has a larger relaxation time related to the dynamic pressure than the other relaxation times related to the shear stress and the heat flux by adopting the ET theory with 6 fields.
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页码：15 / 25
页数：10
相关论文
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