Internal energy in dissipative relativistic fluids

Liu procedure is applied to special relativistic fluids. It is shown that a reasonable relativistic theory is an extended one, where the basic state space contains the momentum density. This property follows from the structure of the energy-momentum balance and the Second Law of thermodynamics. Moreover, we derive that the entropy depends on both the energy density and the momentum density in a specific way, indicating that the local rest frame energy density cannot be interpreted as the internal energy, and that the local rest frame momentum density should be considered, too. The corresponding constitutive relations for the stress and the energy flux are derived.

Keywords

relativistic nonequilibrium thermodynamics, Liu procedure, relativistic internal energy

Milestones

Received: 7 February 2008

Accepted: 25 March 2008

Published: 1 August 2008

Authors

Péter Ván
KFKI Research Institute for Particle and Nuclear Physics Konkoly Thege Miklós út 29-33 H-1121 Budapest Hungary	Bergen Center for Computational Science Høyteknologisenteret Thormøhlensgate 55 N-5008 Bergen Norway
http://newton.phy.bme.hu/~van

Vol. 3, No. 6, 2008

Péter Ván

Abstract

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Authors