Entropy generation in a ten-dimensional cosmological model admitting decompressive forces

Details Entropy generation in a ten-dimensional cosmological model admitting decompressive forces Entropy generation in a ten-dimensional cosmological model admitting decompressive forces

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991an....312...91w&link_type=abstract

Astronomische Nachrichten (ISSN 0004-6337), vol. 312, no. 2, 1991, p. 91-95.

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Astronomical Models, Cosmology, Entropy, Equations Of State, Computational Astrophysics, Flux Density, Quantum Theory, Universe

Scientific paper

A cosmology with a decompressive equation of state is studied in 10 spacetime dimensions with bulk viscosity added. The evolution of the scale factor is calculated for the case of constant bulk viscosity, energy-dependent bulk viscosity, and curvature square-dependent bulk viscosity. The entropy generation rate is calculated for each of these cases, and three alternative cosmologies are compared with respect to the problem of entropy generation. It is speculated that a decompressive equation of state might emerge from a stringlike theory at low temperature and high energy density.

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