  We simulate tidal streams in the presence and absence of substructures inside
the zero redshift snapshot of the Via Lactea II (VL-2) simulation. A halo
finder is used to remove and isolate the subhalos found inside the high
resolution dark matter halo of VL-2, and the potentials for both the main halo
and all the subhalos are constructed individually using the self-consistent
field (SCF) method. This allows us to make direct comparison of tidal streams
between a smooth halo and a lumpy halo without assuming idealized profiles or
triaxial fits. We simulate the kinematics of a star cluster starting with the
same orbital position but two different velocities. Although these two orbits
are only moderately eccentric and have similar apo- and pericentric distances,
we find that the two streams have very different morphologies. We conclude that
our model of the potential of VL-2 can provide insights about tidal streams
that have not been explored by previous studies using idealized or axisymmetric
models.
