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Polytropic Bulk Viscous Cosmological Model with Variable G and Λ

DOI: 10.4236/oalib.1100729, PP. 1-8

Subject Areas: String Theory, Special Theory of Relativity

Keywords: Bianchi Type-I Space Time, Bulk Viscosity, Shear Scalar, Expansion Scalar

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We consider a Bianchi type-I Polytropic bulk viscous fluid cosmological model with variable G and Λ. To get a deterministic model, it is assumed thatand , , , where is the pressure, ρ is the energy density, η is the coefficient of bulk viscosity, α, k, γ and ηo are constants, H is Hubble constant, where k1 > 0, k2 > 0. The solution obtained lead to inflationary phase and the results obtained match with the observations [31] [32]. The case n = 1 for α = 1 is also discussed, relating the results with the observations.

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Tiwari, R. K. , Sharma, M. and Sharma, S. (2014). Polytropic Bulk Viscous Cosmological Model with Variable G and Λ. Open Access Library Journal, 1, e729. doi:


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