[FLASH-USERS] Negative Internal Energies in the 2D, AMR, Z-Pinch problem

[Paul Campbell]

Hello,

I am attempting to get the 2D Z-pinch problem working with AMR but have been unable to get the sim to run without crashing .  From the logs, I appear to be running into many negative internal energy warnings.  It looks like both the electron and ion temperatures/energies need to be continuously corrected.  To try and address this issue, I have tried refining on density, electron, and ion temperatures but the warnings persist.  In terms of the AMR settings, I am using a 32x32 grid with 4x4 cells, a lrefine_max=4, and I have left the refinement cutoffs and filters unchanged from default.  My questions are:


  1.  Is this an issue with the AMR settings, would a finer grid fix this problem?
  2.  Should I be refining on different parameters?
  3.  Is this an issue with a non-AMR setting?

Paul Campbell


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