[FLASH-USERS] EOS tables format conversion

[陶弢]

Hello,
Here I have written a simple matlab script for such conversion, I use sesame Sn data and the output .imx file have been tested in FLASH LaserSlab expamle, with actual run completed successfully. You need to choose your desired [rho,T] grid and the script will interpolate [Pressure, Internal energy, Rosseland, Planck] on that meshgrid, then produced a file in ionmix4 format.
But there are some problems for this version you need to be aware of: 
1. I don't have sesame table containing ionization, so Thomas-Fermi ionization is used here, the error can be significant(20% at most I suppose?).
2. Extrapolation (here I set a small constant extrap_val = 0.1) can happen if you use meshgrid cover a larger [rho,T] than original input grid. For example, the opacity data I have begin with temperature ~ 4eV, so the output imx file is not accurate when start from room temperature.
3. I only have one radiation group in my sesame table, or a "gray" radiation field. If you need multiple groups you have to make some changes to the script, just repeatly write-out each radition group consecutively in the same format.


And also to mention, on this link:http://flash.uchicago.edu/pipermail/flash-users/2015-April/001689.html, Roman suggest using opacplot2 to do the conversion, I tried but I always get the segmentation fault problem, guess I didn't install those librarie right or something. Maybe you can try it first, for better confidence.


Best,
Tao


-----原始邮件-----
发件人:"Acharya, Nitish" <nachary2 at ur.rochester.edu>
发送时间:2019-06-25 21:47:00 (星期二)
收件人: "flash-users at flash.uchicago.edu" <flash-users at flash.uchicago.edu>
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主题: [FLASH-USERS] EOS tables format conversion



Hi all,




I am trying to use SESAME EOS tables+opacity tables of some low Z materials in FLASH. Has anyone had the experience of converting SESAME tables into IONMIX4 format and use them in FLASH?




Thanks,

Nitish




---------------------------

Nitish Acharya

PhD Student

Department of Mechanical Engineering

University of Rochester


--
陶弢 
中国科学技术大学 
物理学院 工程与应用物理系 
安徽省， 合肥市 230026 
联系电话: 0551-63602495 
E-mail: tt397396 at mail.ustc.edu.cn 
------------------------------------
Vincent Tao
University of Science and Technology of China 
Department of Engineering and Applied Physics School of Physical Sciences 
Hefei, Anhui 230026 P. R. China 
Tel: +86-0551-63600946 (Office) 
E-mail: tt397396 at mail.ustc.edu.cn
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