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Jon -<br>
<br>
What you need it to modify equation of state to include ionization
effects. For a fixed chemical composition and without using the
Saha-based approach, you start by modifying the current ideal EOS to
make the mean molecular weight dependent on temperature. Call it an
advanced kludge. You could also return the number of electrons,
etc., as needed for the cooling function. More advanced and costly
approach would ask for a Saha solver.<br>
<br>
Multi-temperature EOS allows for temperature differences between
various plasma components. I am not sure this is what you need
unless you are interested in details of non-equilibrium physics.<br>
<br>
Tomek<br>
--
<div class="moz-forward-container">On 09/16/15 12:10, Jonathan
Slavin wrote:<br>
<blockquote
cite="mid:CACcRS=fmyThKHj95x8K-ZtYVWDDtdqXBa1ue6Z_bFKZENeMEFA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">Okay. I see
that now. Sorry to be so blind. I was confused by the
table that indicates cases where the temperatures are
assumed to be all equal (which is odd for a
multi-temperature gamma). So, any recommendations for a
minimal multi-temperature run? Is there any significant
difference between the various 1-T modes? (For example
MODE_DENS_TEMP, MODE_DENS_EI, etc.)</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">Jon</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Sep 16, 2015 at 11:56 AM,
John ZuHone <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:jzuhone@space.mit.edu" target="_blank">jzuhone@space.mit.edu</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">Hi Jon,
<div><br>
</div>
<div>Unless I am incorrect this section refers to the
“multi-temperature” Gamma EOS. Were you trying to use
that or just the standard single-temperature version?</div>
<span class="HOEnZb"><font color="#888888">
<div><br>
</div>
<div>John</div>
<div><br>
</div>
</font></span>
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<blockquote type="cite"><span class="">
<div>On Sep 16, 2015, at 11:52 AM, Jonathan
Slavin <<a moz-do-not-send="true"
href="mailto:jslavin@cfa.harvard.edu"
target="_blank">jslavin@cfa.harvard.edu</a>>
wrote:</div>
<br>
</span>
<div>
<div class="h5">
<div>
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<div class="gmail_extra">
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">
Hi Dean,</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">But
if you look in section 15.4.1 it
states something different: </div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">"
This EOS can include contributions
from radiation, partially or
completely ionized nuclei, and
electrons. The desired (constant)
ionization level $ {\bar Z}$ of the
nuclei should be specified with the
eos_singleSpeciesZ runtime parameter."</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">Jon</div>
<br>
<div class="gmail_quote">On Wed, Sep 16,
2015 at 11:30 AM, Dean Townsley <span
dir="ltr"><<a
moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:Dean.M.Townsley@ua.edu"><a class="moz-txt-link-abbreviated" href="mailto:Dean.M.Townsley@ua.edu">Dean.M.Townsley@ua.edu</a></a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div text="#000000"
bgcolor="#FFFFFF">Hi Johnathan,<br>
<br>
The gamma-law EOS is just a simple
ideal gas as described in section
15.2 of the user's guide:<br>
<a moz-do-not-send="true"
href="http://flash.uchicago.edu/site/flashcode/user_support/flash4_ug_4p3/node22.html#SECTION06320000000000000000"
target="_blank">http://flash.uchicago.edu/site/flashcode/user_support/flash4_ug_4p3/node22.html#SECTION06320000000000000000</a><br>
<br>
As you can see from the
expressions there, zbar is not
used at all. You should set abar
so that these expressions give
what you expect. This is what
John Zuhone and Tomek I believe
are suggesting.<br>
<br>
Hopefully that helps clarify,<br>
Dean</div>
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-- <br>
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<div>
<div dir="ltr">________________________________________________________<br>
Jonathan D.
Slavin
Harvard-Smithsonian CfA<br>
<a moz-do-not-send="true"
href="mailto:jslavin@cfa.harvard.edu"
target="_blank">jslavin@cfa.harvard.edu</a>
60 Garden Street, MS 83<br>
phone: <a
moz-do-not-send="true"
href="tel:%28617%29%20496-7981"
value="+16174967981"
target="_blank">(617) 496-7981</a>
Cambridge, MA 02138-1516<br>
cell: <a moz-do-not-send="true"
href="tel:%28781%29%20363-0035" value="+17813630035" target="_blank">(781)
363-0035</a> USA<br>
________________________________________________________<br>
<br>
</div>
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<br clear="all">
<div><br>
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-- <br>
<div class="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">________________________________________________________<br>
Jonathan D. Slavin Harvard-Smithsonian
CfA<br>
<a moz-do-not-send="true"
href="mailto:jslavin@cfa.harvard.edu"
target="_blank">jslavin@cfa.harvard.edu</a> 60
Garden Street, MS 83<br>
phone: (617) 496-7981 Cambridge, MA 02138-1516<br>
cell: (781) 363-0035 USA<br>
________________________________________________________<br>
<br>
</div>
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