[lammps-users] 2 Questions about granular Package

Dear all users.
I have 2 questions:
1- How can I increase friction between atoms? (like in hard sphere potential)
2- How can I use atoms in different shape and form.
Best regards
Hamed Maleki

Hamed Maleki
Physics Department, Faculty of Science,
University of Birjand, Birjand, Iran
Home Page: http://hamedmaleki2000.googlepages.com

1 - The parameters entered with the pair_style command affect
the friction - see the doc page for pair_style. Namely, gamma_n
is a damping coeff for collisions restored by Kn. And xmu sets
the upper limit of the tangential force via the Coulomb criterion
Ft = xmu*Fn (n,t are normal,tangential). See the code (pair*gran*cpp)
for the details.

LAMMPS only supports spherical granular particles (or other atoms).
You'd have to add potentials, orientation for non-spherical.