Blar i TKD - Institutt for informasjonsteknologi på emneord "Scale factor"

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    • Bianchi type-I universe model with nonlinear viscosity 

      Mostafapoor, Nouraddin; Grøn, Øyvind (Journal article; Peer reviewed, 2012-08-23)
      In this paper we study the evolution of spatially homogeneous and anisotropic Bianchi type-I Universe models with the cosmological constant, Λ, and filled with nonlinearviscous fluid. The dynamical equations for these ...

    • Viscous Lambda CDM universe models 

      Grøn, Øyvind; Mostafapoor, Nouraddin (Astrophysics and Space Science;333 (2), Journal article; Peer reviewed, 2011-03-30)
      We explore flat ACDM models with bulk viscosity, and study the role of the bulk viscosity in the evolution of these universe models. The dynamical equations for these models are obtained and solved for some cases of ...