Bondary conditions

Dear all ,

why thier is ppf boundary condition used in deposition script of lammps ,what is consequence of other boundary conditions

regards ,

Digvijay

Dear all ,
             why thier is ppf boundary condition used in deposition script
of lammps ,

​so the system is non-periodic in z direction.​

what is consequence of other boundary conditions

​http://lammps.sandia.gov/doc/boundary.html​

​axel.​