freeze dynamics of atoms

Dear All,

I want to simulate a surface in contact with water. I also want to freeze the dynamics of the lower layers of atoms. LAMMPS commands exist that allow me to do this?

tank you

Dear All,
I want to simulate a surface in contact with water. I also want to freeze
the dynamics of the lower layers of atoms. LAMMPS commands exist that allow
me to do this?

what do you mean by "freeze the dynamics"? immobilize the atoms? that
is a frequently discussed topic on this mailing list. a look through
the mailing list archives would have provided you with more
information that you would want to look at. you don't need any special
commands for that. atoms are immobile if they are not time integrated
or have no initial velocity and experience no forces.

E.g. fix setforce 0.0 0.0 0.0

Steve