AUTHOR=Tiwari Rishi Kumar , Alfedeel Alnadhief H. A. , Sofuoğlu Değer , Abebe Amare , Hassan Eltegani I. , Shukla B. K. TITLE=A cosmological model with time dependent Λ, G and viscous fluid in general relativity JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2022.965652 DOI=10.3389/fspas.2022.965652 ISSN=2296-987X ABSTRACT=

In this paper, we investigate Bianchi type − V cosmological models with bulk viscous fluid and time varying cosmological Λ and Newtonian G parameters. The Einstein’s field equations have been transformed into a coupling non-linear, first-order differential equations, and the fourth-order Runge-Kutta method of numerical integration has been used to integrate the differential equations with appropriate initial conditions consistent with current cosmological observations. We show that the model describes a universe that starts off with a negative cosmological term, as well as a matter-dominated and decelerated early epoch that, eventually becomes Λ-dominated and expanding with acceleration, in concordance with current observations.