lammps/doc/dimension.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>dimension command
</H3>
<P><B>Syntax:</B>
</P>
<PRE>dimension N
</PRE>
<UL><LI>N = 2 or 3
</UL>
<P><B>Examples:</B>
</P>
<PRE>dimension 2
</PRE>
<P><B>Description:</B>
</P>
<P>Set the dimensionality of the simulation. By default LAMMPS runs 3d
simulations. To run a 2d simulation, this command should be used
prior to setting up a simulation box via the
<A HREF = "create_box.html">create_box</A> or <A HREF = "read_data.html">read_data</A> commands.
Restart files also store this setting.
</P>
<P>See the discussion in <A HREF = "Section_howto.html">this section</A> for additional
instructions on how to run 2d simulations.
</P>
<P><B>Restrictions:</B>
</P>
<P>This command must be used before the simulation box is defined by a
<A HREF = "read_data.html">read_data</A> or <A HREF = "create_box.html">create_box</A> command.
</P>
<P><B>Related commands:</B>
</P>
<P><A HREF = "fix_enforce2d.html">fix enforce2d</A>
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<P><B>Default:</B>
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<PRE>dimension 3
</PRE>
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