The evolution of galaxies is driven strongly by dynamical processes
including internal instabilities, tidal interactions and mergers.
The cluster environment is a useful laboratory for studying these effects.
I present recent results on simulations
of interacting populations of spiral and elliptical galaxies
in the cosmological collapse of a cluster, showing the formation
of the central, brightest cluster galaxies through merging, the effect of
tidal interactions and merging on galaxy
morphology over cosmic history, and the distribution and kinematics of the
tidal debris field.
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Keywords -- galaxies: dynamics, interactions, mergers, galaxy clusters,
cosmology
