Star clusters born in galactic disks are disrupted due to both the
tidal stripping and the internal evolution of star clusters. We
performed N-body simulations of star clusters in a galactic disk. In
our simulations, both star clusters and galactic disks are modeled as
N-body systems and are integrated using a tree-direct hybrid code,
BRIDGE. BRIDGE treats only star clusters as collisional systems using
a direct code and the others as collisionless systems using a
treecode. We found that star clusters migrate radially due to the
interaction with spiral arms and disrupted when they migrate inward.
The tidal tails spread over 1-2 kpc, but the tail stars are still
close to their parent cluster in the velocity space.