[gmx-users] simulating copper nano particles

[abhishek sharma]

dear all,
I am simulating four copper nanoparticles places symetrically so that
their centres form a regular tetrahederon.I am trying understand their
sintering behavior.So is their any method to calculate the position of
centre of maas of the whole system at any time (say t)  as all the
particles moves  causing shift in the centre of maas.!!
abhishek