Hyper-surface Cosmological Model with Variable Cosmological Parameters

Abstract

The present study deals with the exact solutions of the Einstein’s field equations with variable gravitational and cosmological constants for hyper-surface homogeneous cosmological models containing a bulk viscous fluid. The viscosity coefficient of bulk viscous fluid is assumed to be a power function of energy density. Exact solutions of Einstein’s field equations are obtained which represent expanding, shearing and accelerating/decelerating models of the universe. The physical and kinematical properties of models are also discussed.