Bulk Viscous Cosmological Models in General Relativity

TL;DR

This paper derives new exact solutions for bulk viscous cosmological models in general relativity, exploring their physical properties and implications for different spatial geometries.

Contribution

It introduces a novel class of solutions with variable deceleration parameter for LRS Bianchi type-I spacetime, expanding understanding of viscous cosmological models.

Findings

Hubble's constant less than one for non-flat models

Hubble's constant equals 1.5 for flat models

Physical and geometric properties of the models analyzed

Abstract

A new class of exact solutions of Einstein's field equations with bulk viscous fluid for an LRS Bianchi type-I spacetime is obtained by using deceleration parameter as variable. The value of Hubble's constant $H_{0}$ is found to be less than one for non-flat model and is equal to 1.5 for flat model which are of the physical interest. Some physical and geometric properties of the models are also discussed.