FRW Bulk Viscous Cosmology in Non-flat Universe

Abstract

In this paper we consider FRW bulk viscous cosmology in arbitrary space curvature. We extend recent work to the case of non-flat universe in arbitrary space dimension. We obtain Hubble expansion parameter for special cases and study bulk viscous coefficient and deceleration parameter.

FRW bulk viscous cosmology with modified Chaplygin gas in flat space

“…which is agree with results of previous works [Saadat 2012;Mazumder et al 2012) where ρ ∝ t −2 established. On the other hand for the large bulk viscosity coefficient one can find that b < 0 and hence ρ ∝ ζ/t obtained.…”

“…Then the bulk viscous cosmological models with constant bulk viscosity coefficient constructed (Bali and Dave 2002). In the recent work (Katore et al 2011) the FRW bulk viscous cosmology considered and bulk viscous coefficient obtained in the flat space, and then extended to non-flat space (Saadat 2012). In this work we consider both bulk viscous effect and Chaplygin gas in FRW cosmology in flat space.…”

A Toy Model of Universe

“…[25]. In the recent work [26] the FRW bulk viscous cosmology was considered and bulk viscous coefficient was obtained in the flatspace, and then extended to non-flat space [27]. In this work, we consider both bulk viscous effect and Chaplygin gas in FRW cosmology in flat space.…”

Effect of Varying Bulk Viscosity on Generalized Chaplygin Gas

“…Also, it is possible to extend GCG to the modified Chaplygin gas (MCG) [30], or modified cosmic Chaplygin gas (MCCG) [31]. Moreover, we know that the bulk viscosity plays an important role in cosmology [32,33,34]. The idea that Chaplygin gas may has viscosity first proposed by the Ref.…”