[FLASH-USERS] Heat Exchange simulation

Lécz Zsolt PhD Zsolt.Lecz at eli-alps.hu
Thu Nov 6 05:27:10 EST 2025


Dear Users and Developers,

We are trying to observe the temperature equilibration in a simple simulation where the electrons have some initial temperature and the ions should gain thermal energy during the simulation.

However, when I am using the Spitzer regime, the ion temperature becomes equal to the electron's temperature already at the very beginning of the simulation. I set the initial density low and the temperature high to make the heat exchange slower but it does not help...

 I attached the whole Sim directory and the par file, so you can reproduce the problem. It is basically a modified Sod example. I use the following setup command:

./setup HOFIChTest -2d -auto +3t +splitHydro

Thank you for your help and advice!

Kind regards,   Zsolt



 Zsolt LÉCZ

 Research Fellow
 Tel: +36 30 424 7244
 Email: zsolt.lecz at eli-alps.hu<mailto:xxx.yyy at eli-alps.hu>

[cid:13709719-a221-4855-8d61-914c42ad17a1]

The Extreme Light Infrastructure ERIC | ALPS Facility
 Wolfgang Sandner utca 3., H-6728 Szeged, Hungary

www.eli-laser.eu<http://www.eli-laser.eu> | www.eli-alps.hu<https://www.eli-alps.hu/>


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