  A non-equilibrium thermodynamic analysis has been done for the interacting
dark fluid in the universe bounded by the event horizon.From observational
evidences it is assumed that at present the matter in the universe is dominated
by two dark sectors-dark matter and dark energy. The mutual interaction among
them results in spontaneous heat flow between the horizon and the fluid system
and the thermal equilibrium will no longer hold.In the present work,the dark
matter is chosen in the form of dust while the dark energy is chosen as a
perfect fluid with constant equation in one case and holographic dark energy
model is chosen in the other.Finally,validity of the generalized second law of
thermodynamics has been examined in both cases.
