"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c

:link(lws,http://lammps.sandia.gov)
:link(ld,Manual.html)
:link(lc,Section_commands.html#comm)

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fix enforce2d command :h3

[Syntax:]

fix ID group-ID enforce2d :pre

ID, group-ID are documented in "fix"_fix.html command
enforce2d = style name of this fix command :ul

[Examples:]

fix 5 all enforce2d :pre

[Description:]

Zero out the z-dimension velocity and force on each atom in the group.
This is useful when running a 2d simulation to insure that atoms do
not move from their initial z coordinate.

The forces due to this fix are also imposed during an energy
minimization, invoked by the "minimize"_minimize.html command.

[Restrictions:] none

[Related commands:] none

[Default:] none