fix_enforce2d.html
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	<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
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	<H3>fix enforce2d command
	</H3>
	<P><B>Syntax:</B>
	</P>
	<PRE>fix ID group-ID enforce2d
	</PRE>
	<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command
	<LI>enforce2d = style name of this fix command
	</UL>
	<P><B>Examples:</B>
	</P>
	<PRE>fix 5 all enforce2d
	</PRE>
	<P><B>Description:</B>
	</P>
	<P>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.
	</P>
	<P>The forces due to this fix are also imposed during an energy
	minimization, invoked by the <A HREF = "minimize.html">minimize</A> command.
	</P>
	<P><B>Restrictions:</B> none
	</P>
	<P><B>Related commands:</B> none
	</P>
	<P><B>Default:</B> none
	</P>
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