help in potential wall

Dear lammps-Users

I want to define potential wall and a hole in middle of that which have positive charge in edge of the circular hole.
can anybody help me how to apply charge for this hole in potential-wall?

best,
Mahdi

Dear lammps-Users

I want to define potential wall and a hole in middle of that which have positive charge in edge of the circular hole.
can anybody help me how to apply charge for this hole in potential-wall?

Can you be a bit more specific as to what kind of help you are looking for, and what - if anything - you are willing to offer in exchange for it?

Axel