<div dir="ltr">Hey Klaus,<div>I am also trying to implement hytrogen ionization in my simulation. I am wondering, instead of using IOMIX documents, is it possible to implement a self-written function that calculates electron densities from temperature please?</div><div>Best regards,</div><div>Siyi YU</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jun 21, 2017 at 11:25 AM, Klaus Weide <span dir="ltr"><<a href="mailto:klaus@flash.uchicago.edu" target="_blank">klaus@flash.uchicago.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Wed, 21 Jun 2017, <a href="mailto:stylianos.passalidis17@imperial.ac.uk">stylianos.passalidis17@<wbr>imperial.ac.uk</a> wrote:<br>
<br>
> Good morning, I am working on Flash for HEDP purposes and I would like<br>
> to ask how to find a .cn4 file for hydrogen since the only available are<br>
> for polystyrene, Al and He. Is there such file in order to simulate<br>
> hydrogen- laser interaction?<br>
<br>
</span>Stylianos,<br>
<br>
Welcome to FLASH-USERS.<br>
<br>
There are actually some more IONMIX files in the FLASH release than the<br>
ones with the suffix ".cn4" that you found. You can also find several<br>
files with ".imx" which have been generated with IONMIX and may be usable<br>
for you. Also possibly some files ending in ".cnr".<br>
<br>
Unfortunately not all ".imx" files appear to be in the same format.<br>
Here is a quick guideline -<br>
<br>
1. If the first four lines look like this:<br>
<br>
==============================<wbr>==============================<wbr>==========<br>
21 17<br>
atomic #s of gases: 2<br>
relative fractions: 1.00E+00<br>
30<br>
==============================<wbr>==============================<wbr>==========<br>
<br>
then assume it is an IONMIX 4 output file.<br>
<br>
2. If the first four lines look like this:<br>
<br>
==============================<wbr>==============================<wbr>==========<br>
30 5<br>
atomic #s of gases: 1<br>
relative fractions: 1.00E+00<br>
0.100000E+010.140000E+020.<wbr>333333E+00-.100000E+01 100<br>
==============================<wbr>==============================<wbr>==========<br>
<br>
then assume it is an IONMIX 1 output file.<br>
<br>
3. If the first four lines look totally different from these two samples,<br>
assume neither!<br>
<br>
<br>
The important tell to distinguish between IONMIX 4 and IONMIX 1 is<br>
whether the fourth line contains 5 numbers (4 reals and 1 integer) or<br>
just 1 integer. (In either case the integer represents the number of<br>
radiation energy groups for which the file contains opacities.)<br>
<br>
The IONMIX4 format is documented in section<br>
<br>
22.4.6 The IONMIX EOS/Opacity Format<br>
<br>
of the Users Guide (e.g., <a href="https://flash.uchicago.edu/site/flashcode/user_support/flash4_ug_4p4/node140.html" rel="noreferrer" target="_blank">https://flash.uchicago.edu/<wbr>site/flashcode/user_support/<wbr>flash4_ug_4p4/node140.html</a>)<br>
where IONMIX1 (just called IOMNIX there) is also mentioned.<br>
<br>
<br>
In your case, you may be able to use an IONMIX1 file "h-100grp-lte.imx"<br>
which is included in the FLASH release. You should find copies in the<br>
Eos and Opacity units. Let us know if this does not solve your problem.<br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
Klaus<br>
</font></span></blockquote></div><br></div>