On the temperature of a rarefied gas in non-equilibrium

被引：23

作者：

Barbera, E ^{[1
]}

Müller, I

Sugiyama, M

机构：

[1] Univ Messina, Dipartimento Matemat, Messina, Italy

[2] Tech Univ Berlin, FB Thermodynam 6, D-10623 Berlin, Germany

[3] Nagoya Inst Technol, Dept Syst Engn, Nagoya, Aichi 466, Japan

来源：

MECCANICA | 1999年 / 34卷 / 02期

关键词：

temperature; extended thermodynamics; rarefied gas dynamics; thermodynamics;

D O I：

10.1023/A:1004503318075

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper addresses the problem of the proper definition of temperature of a gas in non-equilibrium. II shows that the mean kinetic energy of the atoms of a rarefied gas is not a good measure for the thermodynamic temperature, because in general it jumps at a wall, and because it is non-monotone in a one-dimensional process of stationary heat conduction. The jump of the 'kinetic temperature' is calculated and found to be about 5 K in a rarefied gas. The basis for the calculations is provided by the arguments of extended thermodynamics of 14 moments. An essential tool is the minimax principle of entropy production recently postulated by Struchtrup & Weiss [1], because it furnishes one important boundary condition.

引用

收藏

页码：103 / 113

页数：11

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