Generation of Bianchi Type V String Cosmological Models with Bulk Viscosity

TL;DR

This paper develops Bianchi type V string cosmological models incorporating bulk viscosity, demonstrating their solvability with arbitrary scale functions and relevance to observational data.

Contribution

It introduces a generation technique to solve Einstein's field equations for viscous string cosmologies with arbitrary scale functions.

Findings

Solutions are applicable to observational results.

Models exhibit physically and geometrically consistent properties.

Bulk viscosity varies as a power function of energy density.

Abstract

Bianchi type V string cosmological models with bulk viscosity for massive string are investigated. The bulk viscosity is assumed to vary with time in such a manner that it is related to simple power function of the energy density. Using generation technique (Camci~et~al., 2001), it is shown that Einstein's field equations are solvable for any arbitrary cosmic scale function. Solution for particular form of cosmic scale functions are also obtained. It is found that solutions based on generation technique are relevant to the observational results. Some physical and geometrical aspect of the models are also discussed.