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<li class="toctree-l1"><a class="reference internal" href="Section_intro.html">1. Introduction</a></li>
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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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<ul class="simple">
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<li>N = 2 or 3</li>
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</ul>
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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 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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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 note">
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<p class="first admonition-title">Note</p>
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<p class="last">Some models in LAMMPS treat particles as finite-size spheres or
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ellipsoids, as opposed to point particles. In 2d, the particles will
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still be spheres or ellipsoids, not circular disks or ellipses,
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meaning their moment of inertia will be the same as in 3d.</p>
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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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