I was thinking of trying out a simulation where I can
somehow make the boundary act elastic, perhaps via
some trick with "fix spring", such that the volume of
my simulation isn't necessarily fixed. (Whether this
is a good idea is another story, but I'll leave that
for another time.)
Now as I've understood it, NVE integration simply
means that no scaling is applied to Newton's laws, so
energy (the "E" in NVE) is conserved, but the
conservation of the "N" and "V" in NVE is a byproduct
of periodic boundary conditions rather than something
enforced by the intergration algorithm itself. Is this correct?