The Relaxation Effect in Dissipative Relativistic Fluid Theories

Details The Relaxation Effect in Dissipative Relativistic Fluid Theories The Relaxation Effect in Dissipative Relativistic Fluid Theories

1995-08-28

arxiv.org/abs/gr-qc/9508058v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Plain TeX -- 16 Pages

Scientific paper

10.1006/aphy.1996.0036

The dynamics of the fluid fields in a large class of causal dissipative fluid theories is studied. It is shown that the physical fluid states in these theories must relax (on a time scale that is characteristic of the microscopic particle interactions) to ones that are essentially indistinguishable from the simple relativistic Navier-Stokes descriptions of these states. Thus, for example, in the relaxed form of a physical fluid state the stress energy tensor is in effect indistinguishable from a perfect fluid stress tensor plus small dissipative corrections proportional to the shear of the fluid velocity, the gradient of the temperature, etc.

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