Initial model of particles of different sizes

LAMMPS
1

Dear LAMMPS users,

I want to establish the initial model of particles with different sizes at a low solid volume fraction (say 0.15). Since the size of small particles is much smaller than large particles, in the initial model established by using “create_atoms”, there might be small particles located inside larger particles. Could you please tell me how to avoid this situation?

Thank you in advance.

Best wishes,

Ann

2

After creating large particles you can use create_atoms overlap to set the minimum distance between created particles and the new ones.

3

You can also use delete_atoms overlap to remove overlapping particles.
See the examples/srd/in.srd.mixture file in the LAMMPS source code for an example of how to use that.

4

It helps. Thank you so much!

5

OK. Thank you so much for your reply.