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Many thanks for your reply, Adam.</div>
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I noticed that I did not use the 'nocurrent' boundary condition in my previous Z-pinch simulations; however, I still did not get zero magnetic pressure. I'm not sure if I made a mistake back then or if this is due to changes in the newer version of the FLASH
code.</div>
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I have encountered negative internal energy during the 3T update error while running a test case for a 2D Z-pinch simulation. I would appreciate any suggestions or feedback that could help. I have attached the ZPinch_2D<code>.log</code> and
<code>flash.par</code> files for reference. Many thanks!</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Adam F Kowalski <Adam.F.Kowalski@Colorado.EDU><br>
<b>Sent:</b> Friday, May 23, 2025 1:23 PM<br>
<b>To:</b> Paria Makaremi-Esfarjani <paria.makaremiesfarjani@mail.mcgill.ca>; flash-users <flash-users@flash.rochester.edu><br>
<b>Subject:</b> Re: ZPinch test case--Zero magnetic energy</font>
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Hi Paria,</div>
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I found the same thing: the default xr_boundary_type = "nocurrent" whereas if you change it to xr_boundary_type = "circuit" you'll get large values of Bz = B_phi as expected (though Eddie might want to confirm this is the only change that needs to be done
to the default flash.par to reproduce his simulation).</div>
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Adam</div>
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<div dir="ltr" id="x_divRplyFwdMsg" style="color:inherit"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> flash-users <flash-users-bounces@flash.rochester.edu> on behalf of Paria Makaremi-Esfarjani <paria.makaremiesfarjani@mail.mcgill.ca><br>
<b>Sent:</b> Friday, May 23, 2025 10:38 AM<br>
<b>To:</b> flash-users <flash-users@flash.rochester.edu><br>
<b>Subject:</b> [FLASH-USERS] ZPinch test case--Zero magnetic energy</span>
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<div style="direction:ltr">Hello,</div>
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I am trying to run the ZPinch test case simulation with the FLASH code on a new device. I followed exactly the same steps mentioned in the manual to test the 1D case for the ZPinch; however, I keep getting zero magnetic energy, which is not correct. Could anyone
please help me understand what I might be doing wrong? When I run the same test with the older version of FLASH on my other device, I get non-zero values for the magnetic energy solution. I have attached flash.par, ZPinch_1D.dat, and ZPinch_1D.log files.<br>
Thank you for your help.</div>
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Regards,</div>
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Paria</div>
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