<div dir="ltr"><p>Hello everyone,</p>
<p>I’m working with the multigroup radiation diffusion module in FLASH, and I would like to have the Rosseland mean opacity written out in the checkpoint/plot files in the same way that density, temperature, and other cell-centered variables are output.</p>
<p>From looking at the source, it seems FLASH is already computing Rosseland means internally for radiation transport, but I don’t see them exposed in the output by default.</p>
<p>Could someone advise on the best way to:</p>
<ol>
<li>
<p>Access the Rosseland opacity values that FLASH is already calculating, and</p>
</li>
<li>
<p>Add them as an output variable (via the Config file / Simulation unit) so they appear in the <code>chk</code>/<code>plt</code> files?</p></li></ol>
<p>Thanks!</p>
<p>Best,<br>
Owen</p></div>