Irrotational Bianchi V Viscous Fluid Cosmology with Heat Flux

TL;DR

This paper presents exact solutions for an irrotational Bianchi V cosmological model incorporating shear and bulk viscosity along with heat flux, analyzing their effects on temperature distribution and entropy increase.

Contribution

It introduces new exact solutions for viscous, heat-flux cosmology under specific assumptions, expanding understanding of anisotropic universe models.

Findings

Viscosity and heat flux increase entropy rate.

Solutions describe temperature distribution in viscous cosmology.

Model adheres to barotropic equation of state.

Abstract

The irrotational Bianchi V cosmological model under the influence of both shear and bulk viscosity, together with heat flux, has been studied. Exact solutions for the model are obtained with three physically viable assumptions. The first two relate the matter density, shear scalar, and expansion scalar and the third is a barotropic equation of state, connecting the matter density and thermodynamic pressure. The properties of the solutions are studied and the temperature distribution is also presented explicitly. It has been observed that along with the viscosity, heat flux further adds to the rate of entropy increase.