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<title>compute smd/ulsph_num_neighs command — LAMMPS 15 May 2015 version documentation</title>
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<div class="section" id="compute-smd-ulsph-num-neighs-command">
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<span id="index-0"></span><h1>compute smd/ulsph_num_neighs command<a class="headerlink" href="#compute-smd-ulsph-num-neighs-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>compute ID group-ID smd/ulsph_num_neighs
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</pre></div>
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</div>
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<ul class="simple">
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<li>ID, group-ID are documented in <a class="reference internal" href="compute.html"><em>compute</em></a> command</li>
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<li>smd/ulsph_num_neighs = style name of this compute command</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>compute 1 all smd/ulsph_num_neighs
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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>Define a computation that returns the number of neighbor particles
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inside of the smoothing kernel radius for particles interacting via the updated Lagrangian SPH pair style.</p>
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<p>See <a class="reference external" href="USER/smd/SMD_LAMMPS_userguide.pdf">this PDF guide</a> to using Smooth Mach Dynamics in LAMMPS.</p>
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<p><strong>Output info:</strong></p>
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<p>This compute returns a per-particle vector, which can be accessed by
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any command that uses per-particle values from a compute as input. See
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<a class="reference internal" href="Section_howto.html#howto-15"><span>Section_howto 15</span></a> for an overview of
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LAMMPS output options.</p>
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<p>The per-particle values will be given dimentionless, see <a class="reference internal" href="units.html"><em>units</em></a>.</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 compute is part of the USER-SMD package. It is only enabled if
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LAMMPS was built with that package. See the <a class="reference internal" href="Section_start.html#start-2"><span>Making LAMMPS</span></a>
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section for more info. This compute can only be used for particles which interact with the updated Lagrangian SPH pair style.</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>smd/tlsph_num_neighs</p>
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<p><strong>Default:</strong> none</p>
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