International Journal of Physics and Astronomy

Spatially homogeneous anisotropic Bianchi Type I inflationary universe for barotropic fluid distribution with variable bulk viscosity
Raj Bali

Abstract
Spatially homogeneous anisotropic Bianchi Type I inflationary scenario for barotropic fluid distribution with variable bulk viscosity is investigated. To get the deterministic and realistic model, we have assumed Ρ Α 3H², ζ Α Ρ^1/2 as considered by Barrow (1988) and Gron (1990) where Ρ is the matter density, Ρ the bulk viscosity, H the Hubble parameter and conservation equation T^j_i;j=0 is taken into account. We find that bulk viscosity prevents the matter density to vanish. The model in general represents anisotropic universe but at late time, it isotropizes. The spatial volume increases with time representing inflationary scenario. The energy conditions as given by Kolassis et al. (1998), Chatterjee and Banerjee (2004) are discussed. The energy condition Ρ + p > 0 is violated due to the presence of scalar field (φ) in inflationary universe.

Full Text: PDF     DOI: 10.15640/ijpa.v3n2a3