  We investigate cosmological models with two interacting fluids: dark energy
and dark matter in flat Friedmann-Robertson-Walker universe. The interaction
between dark energy and dark matter is described in terms of the parameters
present in the inhomogeneous equation of state when allowance is made for bulk
viscosity, for the Little Rip, the Pseudo Rip, and the bounce universes. We
obtain analytic representation for characteristic properties in these
cosmological models, in particular the bulk viscosity $\zeta=\zeta(H,t)$ as
function of Hubble parameter and time. We discuss the corrections of
thermodynamical parameters in the equations of state due coupling between the
viscous fluid and dark matter. Some common properties of these corrections are
elucidated.
