Dissipative Future Universe without Big Rip

TL;DR

This paper explores a dissipative dark energy model using Eckart formalism, showing that a combined fluid approach prevents the big rip singularity and results in a regular, non-diverging scale factor over time.

Contribution

It introduces a novel combination of dark energy models that avoids the big rip in a dissipative universe within Eckart formalism.

Findings

Big rip singularity is avoided in the combined model.

The scale factor remains finite and regular for all time.

Dark energy modeled as generalized Chaplygin gas and fluid with < -1.

Abstract

The present study deals with dissipative future universe without big rip in context of Eckart formalism. The generalized chaplygin gas, characterized by equation of state $p=-\frac{A}{\rho^\frac{1}{\alpha}}$, has been considered as a model for dark energy due to its dark-energy-like evolution at late time. It is demonstrated that, if the cosmic dark energy behaves like a fluid with equation of state $p=\omega\rho$; $\omega < -1$, as well as chaplygin gas simultaneously then the big rip problem does not arises and the scale factor is found to be regular for all time.