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<title>ATC: fix_modify AtC source</title>
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<h1><a class="anchor" id="man_source">fix_modify AtC source </a></h1><h2><a class="anchor" id="syntax">
syntax</a></h2>
<p>fix_modify AtC source &lt;field&gt; &lt;element_set&gt; &lt;value | function&gt;</p>
<ul>
<li>&lt;field&gt; = field name valid for type of physics</li>
<li>&lt;element_set&gt; = name of set of elements </li>
</ul>
<h2><a class="anchor" id="examples">
examples</a></h2>
<p><code> fix_modify atc source temperature middle temporal_ramp 10. 0. </code> </p>
<h2><a class="anchor" id="description">
description</a></h2>
<p>Add domain sources to the mesh. The units are consistent with LAMMPS's units for mass, length and time and are defined by the PDE being solved, e.g. for thermal transfer the balance equation is for energy and source is energy per time. </p>
<h2><a class="anchor" id="restrictions">
restrictions</a></h2>
<p>keyword 'all' reserved in element_set name </p>
<h2><a class="anchor" id="related">
related</a></h2>
<p>see <a class="el" href="man_remove_source.html">fix_modify AtC remove_source</a> </p>
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default</a></h2>
<p>none </p>
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