Bianchi Type V Universe and Bulk Viscous Models with Time Dependent Gravitational Constant and Cosmological Constant in General Relativity
Reena Tandon
Reena Tandon, Department of Mathematics, School of Mechanical Engineering, Lovely Professional University, Phagwara (Punjab), India.
Manuscript received on 16 December 2019 | Revised Manuscript received on 23 December 2019 | Manuscript Published on 31 December 2019 | PP: 251-256 | Volume-9 Issue-1S3 December 2019 | Retrieval Number: A10481291S319/19©BEIESP | DOI: 10.35940/ijeat.A1048.1291S319
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Abstract: This paper deals with Bulk Viscous Models and Bianchi type- universe in the standard general relativity theory by assuming where constants, is the density. Einstein field equations ( ) have been solved in the presence of a variable gravitational constant as well as a variable cosmological constant together with a bulk viscous fluid. In order to find a deterministic solution of EFEs, a simple form of Hubble parameter being constant when where has been considered here that shows the signature flip from early deceleration to present acceleration. Moreover, the bulk viscous coefficient is allowed to vary with the density as . The physical and geometrical behavior are described in detail for the obtained model. The model obtained here is in good agreement with the present cosmological observations.
Keywords: Bulk Viscous Models, Bianchi Type – Models, Cosmological Constants, Hubble Constants and Gravitational Constant.
Scope of the Article: Mechanical Maintenance