<p>where the <em>epsilon</em> parameter determines the depth of the potential
minimum located at <em>Rm</em>, and <em>alpha</em> determines the softness of the repulsion.</p>
<p>The coefficients must be defined for each species in a given particle
type via the <a class="reference internal" href="pair_coeff.html"><span class="doc">pair_coeff</span></a> command as in the examples
above, where the first argument is the filename that includes the
exponential-6 parameters for each species. The file includes the
species tag followed by the <em>alpha</em>, <em>epsilon</em> and <em>Rm</em>
parameters. The format of the file is described below.</p>
<p>The second and third arguments specify the site-site interaction
potential between two species contained within two different
particles. The species tags must either correspond to the species
defined in the reaction kinetics files specified with the <a class="reference internal" href="fix_rx.html"><span class="doc">fix rx</span></a> command or they must correspond to the tag “1fluid”,
signifying interaction with a product species mixture determined
through a one-fluid approximation. The interaction potential is
weighted by the geometric average of the concentrations of the two
species. The coarse-grained potential is stored before and after the
reaction kinetics solver is applied, where the difference is defined
to be the internal chemical energy (uChem).</p>
<p>The fourth and fifth arguments specify the <em>Rm</em> and <em>epsilon</em> scaling exponents.</p>
<p>The final argument specifies the interaction cutoff.</p>
<hr class="docutils" />
<p>The format of a tabulated file is as follows (without the
parenthesized comments):</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="c1"># exponential-6 parameters for various species (one or more comment or blank lines)</span>
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