# Accelerating Dark Energy Cosmological Model in Two Fluid with Hybrid Scale Factor

## TL;DR

This study models the accelerating universe using a two-fluid approach in Bianchi V spacetime, employing a hybrid scale factor to simulate cosmic transition from deceleration to acceleration, highlighting the dominance of dark energy in late times.

## Contribution

It introduces a hybrid scale factor in a two-fluid anisotropic model to explain cosmic acceleration and the transition from string fluid dominance to dark energy dominance.

## Key findings

- String fluid dominates early universe but not at late times.
- Dark energy dominates the current universe, aligning with observations.
- The model captures the transition from deceleration to acceleration.

## Abstract

In this paper, we have investigated the anisotropic behavior of the accelerating universe in Bianchi V space time in the frame work of General Relativity (GR). The matter field we have considered is of two non interacting fluids i.e. the usual string fluid and dark energy (DE) fluid. In order to represent the pressure anisotropy, the skewness parameters are introduced along three different spatial directions. To achieve a physically realistic solutions to the field equations, we have considered a scale factor, known as hybrid scale factor, which is generated by a time varying deceleration parameter. This simulates a cosmic transition from early deceleration to late time acceleration. It is observed that the string fluid dominates the universe at early deceleration phase but does not affect nature of cosmic dynamics substantially at late phase where as, the DE fluid dominates the universe in present time, which is in accordance with the observations results. Hence, we analysed here the role of two fluids in the transitional phases of universe with respect to time which depicts the reason behind the cosmic expansion and DE. The role of DE with variable equation of state parameter (EoS), skewness parameters also discussed along with physical and geometrical properties.