  Bianchi type V viscous fluid cosmological model for barotropic fluid
distribution with varying cosmological term $\Lambda$ is investigated. We have
examined a cosmological scenario proposing a variation law for Hubble parameter
$H$ in the background of homogeneous, anisotropic Bianchi type V space-time.
The model isotropizes asymptotically and the presence of shear viscosity
accelerates the isotropization. The model describes a unified expansion history
of the universe indicating initial decelerating expansion and late time
accelerating phase. Cosmological consequences of the model are also discussed.
