Abstract
Bianchi type I cosmological models with time-varying cosmological constant Λ and bulk viscous fluid are investigated. Cosmic matter is chosen to obey a barotropic equation of state. Exact solutions of Einstein’s field equations are obtained assuming the volume expansion θ proportional to the eigen values of shear tensor σ ij . Physical and kinematical properties of the models are discussed considering bulk viscosity to be a power function of matter density.
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Bali, R., Singh, J.P. Bulk Viscous Bianchi Type I Cosmological Models with Time-Dependent Cosmological Term Λ. Int J Theor Phys 47, 3288–3297 (2008). https://doi.org/10.1007/s10773-008-9764-4
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DOI: https://doi.org/10.1007/s10773-008-9764-4