Thermodynamic pressure in nonequilibrium gases

Raquel Domínguez; David Jou

doi:https://doi.org/10.1103/PhysRevE.51.158

Thermodynamic pressure in nonequilibrium gases

Raquel Domínguez, David Jou

Department of Physics

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Abstract

We analyze the nonequilibrium thermodynamic pressure which is obtained by differentiation of a generalized nonequilibrium entropy. It is proposed that this nonequilibrium thermodynamic pressure, π, is related to the pressure tensor P in the presence of a homogeneous heat flux q→ through P=πU+αq→ q→, with α given by the condition trP=3p, p being the local-equilibrium pressure. A simple situation illustrating the physical difference between π and p is presented. The nonequilibrium entropy, pressure, and pressure tensor are also analyzed from a microscopic point of view in several systems. © 1995 The American Physical Society.

Original language	English
Pages (from-to)	158-163
Journal	Physical Review E
Volume	51
DOIs	https://doi.org/10.1103/PhysRevE.51.158
Publication status	Published - 1 Jan 1995

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title = "Thermodynamic pressure in nonequilibrium gases",

abstract = "We analyze the nonequilibrium thermodynamic pressure which is obtained by differentiation of a generalized nonequilibrium entropy. It is proposed that this nonequilibrium thermodynamic pressure, π, is related to the pressure tensor P in the presence of a homogeneous heat flux q→ through P=πU+αq→ q→, with α given by the condition trP=3p, p being the local-equilibrium pressure. A simple situation illustrating the physical difference between π and p is presented. The nonequilibrium entropy, pressure, and pressure tensor are also analyzed from a microscopic point of view in several systems. {\textcopyright} 1995 The American Physical Society.",

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AU - Jou, David

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N2 - We analyze the nonequilibrium thermodynamic pressure which is obtained by differentiation of a generalized nonequilibrium entropy. It is proposed that this nonequilibrium thermodynamic pressure, π, is related to the pressure tensor P in the presence of a homogeneous heat flux q→ through P=πU+αq→ q→, with α given by the condition trP=3p, p being the local-equilibrium pressure. A simple situation illustrating the physical difference between π and p is presented. The nonequilibrium entropy, pressure, and pressure tensor are also analyzed from a microscopic point of view in several systems. © 1995 The American Physical Society.

AB - We analyze the nonequilibrium thermodynamic pressure which is obtained by differentiation of a generalized nonequilibrium entropy. It is proposed that this nonequilibrium thermodynamic pressure, π, is related to the pressure tensor P in the presence of a homogeneous heat flux q→ through P=πU+αq→ q→, with α given by the condition trP=3p, p being the local-equilibrium pressure. A simple situation illustrating the physical difference between π and p is presented. The nonequilibrium entropy, pressure, and pressure tensor are also analyzed from a microscopic point of view in several systems. © 1995 The American Physical Society.

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M3 - Article

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VL - 51

SP - 158

EP - 163

JO - Physical Review E

JF - Physical Review E

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Thermodynamic pressure in nonequilibrium gases

Abstract

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