Abstract
Abstract
We study the homogeneous and anisotropic evolution of Bianchi type-I
spacetime driven by perfect fluid with shear viscosity. We obtain exact
solutions by considering the simplest form of the equation of state wherein
the pressure and the shear stress are proportional to the energy density
individually. A special case of our general solutions represent Bianchi
type-VII cosmology. We analyse the singularity structure of the solutions
and its connection with various energy conditions. We find that the
initial singularity can be removed only for the Bianchi type-VII. We also
analyse the late-time behaviour of the solutions and find that, compared
to the usual Friedmann universe, the spacetime expands less rapidly and
the energy density drops faster.