On nonperfect fluid cosmologies evolving towards perfect fluid cosmological models.

Details On nonperfect fluid cosmologies evolving towards perfect fluid cosmological models. On nonperfect fluid cosmologies evolving towards perfect fluid cosmological models.

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jmp....31..365c&link_type=abstract

Journal of Mathematical Physics, Vol. 31, No. 2, p. 365 - 370

Mathematics

Logic

Cosmological Models

Scientific paper

The problem of entropy production in near-equilibrium situations and their evolution towards a state of thermodynamic equilibrium is considered in the cosmological context. A physically realistic model (i.e., satisfying the energy conditions) describing such a situation is constructed. From a few hypotheses and considerations, it is seen that the metric tensors of the space-time at both equilibrium and nonequilibrium configurations are conformally related. The material content described by the energy-momentum tensor is interpreted as a viscous fluid smoothly evolving into a perfect one.

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