  The future asymptotic behaviour of a non-titled Bianchi Type IV viscous fluid
model is analyzed. In particular, we consider the case of a viscous fluid
without heat conduction, and constant expansion-normalized bulk and shear
viscosity coefficients. We show using dynamical systems theory that the only
future attracting equilibrium points are the flat Friedmann-LeMaitre (FL)
solution, the open FL solution and the isotropic Milne universe solution. We
also show the bifurcations exist with respect to an increasing
expansion-normalized bulk viscosity coefficient. It is finally shown through an
extensive numerical analysis, that the dynamical system isotropizes at late
times.

General Relativity and Quantum Cosmology;Cosmology and Nongalactic Astrophysics;Dynamical Systems;Numerical Analysis