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We introduce a numerical method to integrate tidal effects on collisionalsystems, using any definition of the external potential as a function of spaceand time. Rather than using a linearisation of the tidal field, this new methodfollows a differential technique to numerically evaluate the tidal accelerationand its time derivative. Theses are then used to integrate the motions of thecomponents of the collisional systems, like stars in star clusters, using apredictor-corrector scheme. The versatility of this approach allows the studyof star clusters, including their tidal tails, in complex, multi-components,time-evolving external potentials. The method is implemented in the code nbody6(Aarseth 2003).

A flexible method to evolve collisional systems and their tidal debris in external potentials