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<p>Hi Marissa,</p>
<p>Great things are looking good so far. So far as I can see, the
concept of different ions breaks down as it is solved as a single
fluid. So the next step will likely need to be to go to the
hybrid-PIC where the 2 ion species could be computed separately in
the electron fluid. I've used a lot of PIC but in my current case
it is far too computationally expensive to look at these
multi-species dynamics over such a long time-scale at these
temperatures. The documentation for the hybrid section is quite
difficult to understand, with the examples even harder. Do
yourself or any of your colleagues have experience setting up the
hybrid problem? The 2 species would be initialised as cold, no
e-field, no-b-field, just a target and energy deposition from a
laser. For example, I see no simple way of specifiying the ion
position such as in the laser-slab problem.</p>
<p>Sorry if I am spamming! But I appreciate the help.</p>
<p>All the best,</p>
<p>Aodhan<br>
</p>
<div class="moz-cite-prefix">On 13/02/2020 11:02, Marissa Adams
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALgAg_zB3tixxR4H=MMHJNpwizcVavmF3HGaWQpXhS+k3tFpMQ@mail.gmail.com">
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<div>Hi Aodhan,
<div dir="auto"><br>
</div>
<div dir="auto">I am so glad I was able to help you. When it
comes to pulling information pertinent to each species you
can multiply whatever variable by the variables you have
assigned to each species. These variables in the original
LaserSlab problem are referred to as "cham" and "targ."
The "cham" being a "pseudo-vacuum" (as aiming to solve
Maxwell's equations for light from the Eulerian
perspective is another problem on its own, so we place a
fake material there at low density to simulate vacuum),
and "targ" is the species of the target, say Al in the
original case, or CH in yours. So you *can* acquire
information about CH. </div>
<div dir="auto"><br>
</div>
<div dir="auto">I thought (will admit I didn't google
though) a bit more about your problem in determining
information from CH on C though. Perhaps you can implement
a numerical transition in the
Simulation_adjustEvolution.F90 routine? Or do some sort of
weighting on the "targ" species for C? I would recommend
asking someone who is more familiar with chemistry or
equation of state under whatever conditions you're dealing
with at your institution. It could be cause for a new and
exciting collaboration.</div>
<div dir="auto"><br>
</div>
<div dir="auto">I hope this helps! Best of luck! </div>
<div dir="auto"><br>
</div>
<div dir="auto">Marissa</div>
<br>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Feb 12, 2020,
19:07 Aodhan McIlvenny <<a
href="mailto:amcilvenny01@qub.ac.uk"
moz-do-not-send="true">amcilvenny01@qub.ac.uk</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p>Hi Marissa,</p>
<p>Thanks for the help, it's now running. <br>
</p>
<p>I noticed this page in the manual previously, since
it noted that it tracked the average ionization and
average atomic number only. I was hoping that there
would be a quick change to the input file that
allowed the output of each ion species within 1
material, since the IONMIX file has a relative
abundance of each ion species, they must be being
computed but maybe not output. I will continue to
look into this.
<br>
</p>
<p>All the best,</p>
<p>Aodhan<br>
</p>
<div>On 13/02/2020 01:16, Marissa Adams wrote:<br>
</div>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Feb
12, 2020 at 12:30 AM Aodhan McIlvenny <<a
href="mailto:amcilvenny01@qub.ac.uk"
target="_blank" rel="noreferrer"
moz-do-not-send="true">amcilvenny01@qub.ac.uk</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div>
<p>Hi all,</p>
<p>I have 2 questions which I hope are
easy to answer; I am a bit stuck when
trying to change the material in the
laserslab example.
<br>
</p>
<ul>
<li>I am trying to use the polystyrene
ionmix4 file which is in the same
format as the aluminium one however it
returns an error that it can't be
found. Any ideas why this is so?<br>
</li>
</ul>
</div>
</blockquote>
<div>Where are you running the executable?
Perhaps you have not moved that particular
file to the directory where you are running
the
<font face="monospace">./flash4</font>
executable. If you are running the
executable in the
<i>object</i> directory where you have
configured and made it, then the default
Simulation module for the
<i>LaserSlab</i> problem will have not moved
that particular file there. You can change
this by editing the
<i>Config</i> file. For instance, I can see
that in my version of the <i>LaserSlab</i>
problem, it will only copy these files to
the object directory:<br>
<p><span
style="font-variant-ligatures:no-common-ligatures">DATAFILES
al-imx-002.cn4</span></p>
<p><span
style="font-variant-ligatures:no-common-ligatures">DATAFILES
al-imx-003.cn4</span></p>
<p><span
style="font-variant-ligatures:no-common-ligatures">DATAFILES
he-imx-005.cn4</span></p>
</div>
<div>e.g. Tables for aluminum and helium as
found in the <i>Config</i> file in <i>
/source/Simulation/SimulationMain/LaserSlab/</i><br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div>
<ul>
<li>Secondly, can I track the carbon and
proton species separately from this
one material? Ideally I would like to
return the position and temperature of
carbon and protons separately. Is
there a partciular syntax for looking
at each ion species from 1 material?</li>
</ul>
</div>
</blockquote>
<div>In order to track the in particular just
the *carbon* elements of a plastic material
such as CH, that will require your own
scientific inquiry; from my
naive experience, I've never heard of
someone doing that in a Eulerian fluid code
but I am sure I one can google it if it's
been done. However, if you want to do
standardized extractions of the species
you're using as materials in FLASH, as well
as acquire information such as the electron
and ion densities, make sure you're using 3T
and take a gander at page 539/section 34.7
of the user manual. </div>
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<div>
<ul>
</ul>
<p>I have attached my .par file. I would
much appreciate some help! I am using
FLASH.4.6.2 and setup command was
<br>
</p>
<p>./setup -auto LaserSlab -2d
+cylindrical -nxb=16 -nyb=16 +hdf5typeio
species=cham,targ +mtmmmt +laser +uhd3t
+mgd mgd_meshgroups=6
-parfile=VulcanTest2.par<br>
</p>
<p>Thanks in advance,</p>
<p>Aodhan<br>
</p>
</div>
</blockquote>
</div>
<div><br>
</div>
Best,<br>
Marissa<br clear="all">
<div><br>
</div>
-- <br>
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<div dir="ltr"><font
size="1"
face="monospace"
color="#000000">%---------------------------------------------%</font>
<div><font size="1"
face="monospace"
color="#000000">Marissa
B. P. Adams</font></div>
<div><font size="1"
face="monospace"
color="#000000">(she/her/hers)</font></div>
<div><font size="1"
face="monospace"
color="#000000">Phd
Candidate,
University of
Rochester</font></div>
<div><font size="1"
face="monospace"
color="#000000">NDVS,
University of
Chicago</font></div>
<div><font size="1"
face="monospace"
color="#000000"><b>E-mail:</b> <a
href="mailto:marissa@flash.uchicago.edu" style="color:rgb(17,85,204)"
target="_blank"
rel="noreferrer"
moz-do-not-send="true">marissa@flash.uchicago.edu</a></font></div>
<div><font size="1"
face="monospace"
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href="http://www.pas.rochester.edu/~madams" style="color:rgb(17,85,204)"
target="_blank"
rel="noreferrer"
moz-do-not-send="true">https://www.pas.rochester.edu/~madams</a></font></div>
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<div><font size="1"
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Location:</b></font></div>
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<div><font size="1"
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<div><span
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IL 60637</span></div>
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