Bulk Viscous Anisotropic Cosmological Models with Dynamical Cosmological Parameters G and ∧

S. Kotambkar¹, G. P. Singh², R. Kelkar³

¹Department of Mathematics, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India.
²Department of Mathematics, Visvesvaraya, National Institute of Technology, Nagpur, India.
³Department of Mathematics, S. B. Jain Institute of Technology Management and Research, Nagpur, India.

DOI: 10.4236/ns.2015.74021                

Abstract

This paper deals with the Bianchi type I anisotropic models of the universe, filled with a bulk viscous cosmic fluid, in the presence of variable gravitational and cosmological constants. Some exact solutions of Einstein’s gravitational field equations with bulk viscosity, gravitational and cosmological constants have been obtained. Several well known forms of cosmological terms have been considered to discuss the effect of cosmological variables. The new cosmological models presented in this paper approaches to isotropic model with evolution of universe. The physical and dynamical properties of the models have also been discussed.

Keywords

Bianchi Type-I, Bulk Viscosity, Gravitational and Cosmological “Constant”

Conflicts of Interest

The authors declare no conflicts of interest.

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