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<li>dimension command</li>
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<a href="http://lammps.sandia.gov">Website</a>
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<div class="section" id="dimension-command">
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<span id="index-0"></span><h1>dimension command<a class="headerlink" href="#dimension-command" title="Permalink to this headline">¶</a></h1>
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<div class="section" id="syntax">
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<h2>Syntax<a class="headerlink" href="#syntax" title="Permalink to this headline">¶</a></h2>
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<div class="highlight-python"><div class="highlight"><pre>dimension N
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</pre></div>
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</div>
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<ul class="simple">
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<li>N = 2 or 3</li>
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</ul>
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</div>
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<div class="section" id="examples">
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<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h2>
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<div class="highlight-python"><div class="highlight"><pre>dimension 2
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</pre></div>
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</div>
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</div>
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<div class="section" id="description">
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<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
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<p>Set the dimensionality of the simulation. By default LAMMPS runs 3d
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<HR>
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<H3>dimension command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>dimension N
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</PRE>
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<UL><LI>N = 2 or 3
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>dimension 2
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>Set the dimensionality of the simulation. By default LAMMPS runs 3d
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simulations. To run a 2d simulation, this command should be used
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prior to setting up a simulation box via the
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<a class="reference internal" href="create_box.html"><em>create_box</em></a> or <a class="reference internal" href="read_data.html"><em>read_data</em></a> commands.
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Restart files also store this setting.</p>
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<p>See the discussion in <a class="reference internal" href="Section_howto.html"><em>Section_howto</em></a> for
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additional instructions on how to run 2d simulations.</p>
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<div class="admonition warning">
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<p class="first admonition-title">Warning</p>
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<p class="last">Some models in LAMMPS treat particles as finite-size
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<A HREF = "create_box.html">create_box</A> or <A HREF = "read_data.html">read_data</A> commands.
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Restart files also store this setting.
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</P>
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<P>See the discussion in <A HREF = "Section_howto.html">Section_howto</A> for
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additional instructions on how to run 2d simulations.
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</P>
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<P>IMPORTANT NOTE: Some models in LAMMPS treat particles as finite-size
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spheres or ellipsoids, as opposed to point particles. In 2d, the
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particles will still be spheres or ellipsoids, not circular disks or
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ellipses, meaning their moment of inertia will be the same as in 3d.</p>
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</div>
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</div>
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<div class="section" id="restrictions">
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<h2>Restrictions<a class="headerlink" href="#restrictions" title="Permalink to this headline">¶</a></h2>
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<p>This command must be used before the simulation box is defined by a
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<a class="reference internal" href="read_data.html"><em>read_data</em></a> or <a class="reference internal" href="create_box.html"><em>create_box</em></a> command.</p>
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</div>
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<div class="section" id="related-commands">
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<h2>Related commands<a class="headerlink" href="#related-commands" title="Permalink to this headline">¶</a></h2>
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<p><a class="reference internal" href="fix_enforce2d.html"><em>fix enforce2d</em></a></p>
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</div>
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<div class="section" id="default">
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<h2>Default<a class="headerlink" href="#default" title="Permalink to this headline">¶</a></h2>
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<div class="highlight-python"><div class="highlight"><pre>dimension 3
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</pre></div>
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ellipses, meaning their moment of inertia will be the same as in 3d.
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</P>
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<P><B>Restrictions:</B>
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</P>
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<P>This command must be used before the simulation box is defined by a
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<A HREF = "read_data.html">read_data</A> or <A HREF = "create_box.html">create_box</A> command.
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