git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@14950 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/html/_sources/fix_enforce2d.txt

@@ -0,0 +1,80 @@
+.. index:: fix enforce2d
+
+fix enforce2d command
+=====================
+
+fix enforce2d/cuda command
+==========================
+
+Syntax
+""""""
+
+.. parsed-literal::
+
+   fix ID group-ID enforce2d
+
+* ID, group-ID are documented in :doc:`fix <fix>` command
+* enforce2d = style name of this fix command
+
+Examples
+""""""""
+
+.. parsed-literal::
+
+   fix 5 all enforce2d
+
+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.
+
+
+----------
+
+
+Styles with a *cuda* suffix are functionally the same as the
+corresponding style without the suffix.  They have been optimized to
+run faster, depending on your available hardware, as discussed in
+:doc:`Section_accelerate <Section_accelerate>` of the manual.  The
+accelerated styles take the same arguments and should produce the same
+results, except for round-off and precision issues.
+
+These accelerated styles are part of the USER-CUDA package.  They are
+only enabled if LAMMPS was built with that package.  See the :ref:`Making LAMMPS <start_3>` section for more info.
+
+You can specify the accelerated styles explicitly in your input script
+by including their suffix, or you can use the :ref:`-suffix command-line switch <start_7>` when you invoke LAMMPS, or you can
+use the :doc:`suffix <suffix>` command in your input script.
+
+See :doc:`Section_accelerate <Section_accelerate>` of the manual for
+more instructions on how to use the accelerated styles effectively.
+
+
+----------
+
+
+Restart, fix_modify, output, run start/stop, minimize info
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+No information about this fix is written to :doc:`binary restart files <restart>`.  None of the :doc:`fix_modify <fix_modify>` options
+are relevant to this fix.  No global or per-atom quantities are stored
+by this fix for access by various :ref:`output commands <howto_15>`.  No parameter of this fix can
+be used with the *start/stop* keywords of the :doc:`run <run>` command.
+
+The forces due to this fix are imposed during an energy minimization,
+invoked by the :doc:`minimize <minimize>` command.
+
+Restrictions
+""""""""""""
+ none
+
+**Related commands:** none
+
+**Default:** none
+
+
+.. _lws: http://lammps.sandia.gov
+.. _ld: Manual.html
+.. _lc: Section_commands.html#comm