[lammps-users] Compute force between certain groups

Dear LAMMPS users,

I want to calculate interaction forces between many groups. And each group consists of several atoms.
The simulation box is assigned with periodic boundary condition in each dimension, and the pair_syle is the lj/cut/coul/long (kspace_style pppm).

The problem is that the number of goups is around 80, which indicate the code “compute group/group” is not applicable.
Also, code “force/tally” can not provide desired result since it ignores the Kspace interactions.
So, is there any commond for it?

Thanks in advance

Jianbo Wang

What do you need this data for? How frequent do you need to compute it?