[FLASH-USERS] The problem of using sesame state equation files in flash (electronic and ionic parts)

[Hansen, Eddie]

Hi Lizy,

The sesame file that FLASH reads in should be an ascii file (one material per file) in the same format as described in LA-UR-92-3407, which is presumably the document you were already referring to. One of the limitations in FLASH is that the sesame reader will only work for a 3T simulation, so the material needs tables 303 and 304 which do not exist for every material in the sesame library.

Some people also have access to sesame data for ionization, opacities, transport coefficients, etc., but these are not supported in FLASH. It is worth noting that FLASH will use a Thomas-Fermi model for ionization when using sesame for the EOS.

--
Eddie Hansen
Applications Group Leader
Flash Center for Computational Science


From: flash-users <flash-users-bounces at flash.rochester.edu> on behalf of lizy <3287940670 at qq.com>
Date: Thursday, June 19, 2025 at 11:42 PM
To: flash-users <flash-users at flash.rochester.edu>
Subject: [FLASH-USERS] The problem of using sesame state equation files in flash (electronic and ionic parts)
Dear Flash developer, hello.
I would like to consult you about some questions regarding the equation of state table.
In Flash, the sesame file format mentions Tables 101, 201, 303 (ions), and 304 (electrons)
In the SESAME: THE LOS ALAMOS INTERNATIONAL LABORATORYEQUATION OF STATE BASE file, it is mentioned that:
Table 301  Total EOS (304 + 305 + 306)
Table 303   Ion EOS Plus Cold Curve (305 + 306)
Table 304  Electron EOS
Table 305   Ion EOS (Including Zero Point)
Table 306  Cold Curve (No Zero Point)
The former is part 304, 303 of the electronic equation of state and the ion equation of state; The latter is part 304 and 305
Is the sesame database in Flash not compatible with the data in LOS ALAMOS National Laboratory?
May I ask if I need to process the data in the existing sesame file of LOS ALAMOS National Laboratory?
Thank you very much for your answer!
lizy
06.20.2025
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