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We investigate the cosmological implications of a phantom dark energy modelwith bulk viscosity. We explore this model as a possible way to resolve the bigrip singularity problem that plagues the phantom models. We use the latest typeIa supernova and Hubble parameter data to constrain the model parameters andfind that the data favor a significant bulk viscosity over a non-constantpotential term for the phantom field. We perform a dynamical analysis of themodel and show that the only stable and physical attractor corresponds to aphantom-dominated era with a total equation of state that can be greater than$-1$ due to the viscosity. We also study the general effect of viscosity on thephantom field and the late time evolution of the universe. We apply thestatefinder diagnostic to the model and find that it approaches a nearby fixedpoint asymptotically, indicating that the universe can escape the big ripsingularity with the presence of bulk viscosity. We conclude that bulkviscosity can play an important role in affecting the late-time behavior aswell as alleviating the singularity problem of the phantom universe.

Viscous effect in the late time evolution of phantom universe