A Cosmological Model with Bulk Viscosity in Scalar Tensor Theory

Abstract

In the present work, we have probed the significance of a new class of Hypersurface-homogeneous cosmological model containing bulk viscous fluid in the background of scalar tensor theory of gravitation formulated by Saez and Ballester (Phys. Lett. A 113:467, 1986). Some exact solutions of Einstein’s modified field equations have been obtained explicitly by using two specific physically viable conditions. One is the proportionality relation between the shear scalar and the expansion scalar (Gen. Relativ. Gravit. 12:805, 1980). In the other condition, we assume that the bulk viscosity is proportional to the expansion scalar (Int. J. Theor. Phys. 54:2652, 2015). A careful analysis of all the physical parameters of the model has been carried out.