Bulk Viscous Fluid Friedmann Cosmology with Decaying Vacuum Energy

Abstract

Friedmann Cosmological models with time dependent deceleration parameter in Einstein's theory of gravitation in the presence of bulk viscosity have been obtained by considering the universe as a functional relation of Hubble parameter H. Exact solutions have been obtained for a spatially flat FRW cosmological model by keeping the variable deceleration parameter for choices of the bulk viscosity. Physical, geometric and kinematic behaviour of the model has been also discussed along with the stability of the result.