Decelerating causal bulk viscous cosmological models

The dynamics of a causal bulk viscous cosmological fluid filled flat consta ntly decelerating noninflationary Robertson-Walker spacetime is considered. The matter component of the Universe is assumed to satisfy a linear barotr opic equation of state and the state equation of the small temperature Bolt zmann gas. The resulting cosmological models satisfy the condition of small ness of the viscous stress. The evolution of the relaxation time, temperatu re, bulk viscosity coefficient and comoving entropy of the dissipative cosm ological fluid are obtained by assuming several bulk viscosity coefficient- relaxation time relations.