Dear lammps users,

I want to calculate the total force between two groups of atoms after using addforce for one of them. I know that compute group/group can calculate the force between two groups, but i don’t know after using addforce how can i calculate the total force between those two groups. should i use compute group/group again?

any suggestion?

Best Wishes

Aisan

Dear lammps users,

I want to calculate the total force between two groups of atoms after

using addforce for one of them. I know that compute group/group can

calculate the force between two groups, but i don't know after using

addforce how can i calculate the total force between those two groups.

should i use compute group/group again?

any suggestion?

since fix addforce is not a pairwise force, but a per-atom contribution,

the question of how it affects the force between groups is a simple

exercise of little bit of vector algebra.

axel.