git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@1 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/fix_enforce2d.txt

@@ -0,0 +1,35 @@
+"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)
+
+:line
+
+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