Some expanding and shearing viscous fluid cosmological models in general relativity

Details Some expanding and shearing viscous fluid cosmological models in general relativity Some expanding and shearing viscous fluid cosmological models in general relativity

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.141..207b&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 141, no. 2, Feb. 1988, p. 207-216.

Physics

Fluid Dynamics

8

Astronomical Models, Fluid Dynamics, Relativity, Viscous Fluids, Cosmology, Field Theory (Physics), Gravitational Fields, Shear Flow

Scientific paper

Two cylindrically symmmetric cosmological models representing viscous fluid distributions are developed, with the free-gravitational field of type-D in which the coefficient of shear viscosity is assumed to be proportional to the rate of expansion. The developed equations were used to obtain the pressure, density, shear, scalars of expansion, and nonvanishing components of conformal curvature tensor in the absence of viscosity. It is shown that, in the absence of viscosity, the model represents expanding, shearing, geodetic, and nonrotating universe in general. For large valules of T, the model does not approach isotropy and is also conformally flat.

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