Dynamics of Rarefied Polyatomic Gas with Molecular Relaxation Processes Based on Extended Thermodynamics
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- Arima Takashi
- National Institute of Technology, Tomakomai College
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- Sugiyama Masaru
- Nagoya Institute of Technology
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- Ruggeri Tommaso
- University of Bologna
Bibliographic Information
- Other Title
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- 分子内部運動の緩和を伴う多原子分子・希薄気体の力学 -拡張された熱力学の展開-
Abstract
<p>We present an extended thermodynamics theory which describes two essential dissipative processes in a rarefied polyatomic gas, that is, the processes with (i) molecular rotational and vibrational relaxation, and (ii) viscous and heat-conduction. The independent variables of the theory are the moment of a distribution function which obeys the Boltzmann equation. We introduce a simple collision term with three relaxation times, which is a generalization of the BGK model. The closed field equations are derived using the maximum entropy principle. As a typical application of the theory, we study linear wave propagation phenomena in a gas.</p>
Journal
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- NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan
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NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan 65 (0), 211-, 2019
National Committee for IUTAM
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Keywords
Details 詳細情報について
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- CRID
- 1390571106617224704
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- NII Article ID
- 130008100877
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed