[FLASH-USERS] [Error] Negative 3T internal energy

[Miguel Felipe Silva Vasconcelos]

Hello,

I'm executing modified versions of the Laserslab simulation with a more
refined level and, in some versions of my simulations, the following error
occurs:

 DRIVER_ABORT: [hy_uhd_unsplitUpdateMultiTemp] Negative 3T internal energy,
CHECK LOG

I've found this information on FLASH's docummentation:

*"The entropy advection approach has some practical limitations that
prevent its use in FLASH for general problems. First, many of the 3T EOS
models in FLASH do not support the calculation of electron entropy. The
only EOS that does is the gamma-law model which is not appropriate modeling
many HEDP experiments. Furthermore, oscillations in the electron and ion
temperatures have been observed when using this approach. These
oscillations can lead to negative ion temperatures. For these reasons, the
entropy advection approach has not yet been used for production FLASH
simulations of HEDP experiments."*

I'd like to know if this is what is happening and if someone knows how to
solve this issue.

Regards,

Miguel Vasconcelos
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