Stability of viscous fluid in Bianchi type-VI model with cosmological
  constant
  In this paper, we investigate Bianchi type-$VI$ cosmological model for the
universe filled with dark energy and viscous fluid in the presence of
cosmological constant. Also, we show accelerating expansion of the universe by
drawing volume scale, pressure and energy density versus cosmic time. In order
to solve the Einstein field equations, we assume the expansion scalar is
proportional to a component of the shear tensor. Therefore, we obtain the
directional scale factors and show the EOS parameter crosses over phantom
divided-line.
