Nonequilibrium kinetic temperatures in flowing gases

M. Criado-Sancho, D. Jou, J. Casas-Vázquez

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34 Citations (Scopus)


Kinetic non-equilibrium temperatures in the several spatial directions are obtained for a flowing ideal gas under a fixed shear pressure in the maximum-entropy formalism. Equipartition is not followed: temperatures along the directions of velocity and the velocity gradient are found to increase and the temperature in the remaining direction to decrease when the viscous pressure increases. These temperatures are compared to other non-equilibrium temperatures, defined from the internal energy, the entropy, and the fluctuation-dissipation theorem. © 2005 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)339-341
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Publication statusPublished - 13 Feb 2006


  • Entropy
  • Information theory
  • Non-equilibrium temperature


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