[FLASH-USERS] confusion regarding abar and zbar

[John ZuHone]

Hi Jon,

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?

John

> On Sep 16, 2015, at 11:52 AM, Jonathan Slavin <jslavin at cfa.harvard.edu> wrote:
> 
> ​Hi Dean,
> 
> But if you look in section 15.4.1 it states something different: 
> "​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."
> 
> Jon
> 
> On Wed, Sep 16, 2015 at 11:30 AM, Dean Townsley <Dean.M.Townsley at ua.edu <mailto:Dean.M.Townsley at ua.edu>> wrote:
> Hi Johnathan,
> 
> The gamma-law EOS is just a simple ideal gas as described in section 15.2 of the user's guide:
> http://flash.uchicago.edu/site/flashcode/user_support/flash4_ug_4p3/node22.html#SECTION06320000000000000000 <http://flash.uchicago.edu/site/flashcode/user_support/flash4_ug_4p3/node22.html#SECTION06320000000000000000>
> 
> 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.
> 
> Hopefully that helps clarify,
> Dean
> 
> 
> 
> 
> -- 
> ________________________________________________________
> Jonathan D. Slavin                 Harvard-Smithsonian CfA
> jslavin at cfa.harvard.edu <mailto:jslavin at cfa.harvard.edu>       60 Garden Street, MS 83
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