Thermodynamic pressure in nonequilibrium gases

Raquel Domínguez, David Jou

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45 Citations (Scopus)


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 languageEnglish
Pages (from-to)158-163
JournalPhysical Review E
Publication statusPublished - 1 Jan 1995


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