<div dir="auto">Hi</div><div dir="auto">I have developed radiation mhd code for pulsed z pinch system for Energetiq Technology. My code which is visual  produces its own mesh and uses fluctuation distribution and includes the first wave model for this system. I learned these methods from my PhD advisor Phillip Roe at Univ. Of Michigan who passed very recently. If interested we can collaborate</div><div dir="auto"><br></div><div dir="auto">Prof. Necdet Aslan</div><div dir="auto"><br></div><div dir="auto">PS. You can check my LinkedIn page for a little more detail</div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="auto"></div></div></div></div></div><div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, May 8, 2026 at 12:39 Hansen, Eddie <<a href="mailto:ehansen@pas.rochester.edu">ehansen@pas.rochester.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">



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That B-field might be diffusing away quickly if your setup still has high resistivity in the ‘vacu’ region. The ZPinch problem is really only designed to work in cylindrical geometry, and we do not currently support running Z-pinches in Cartesian.
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<div>—</div>
<div><b>Eddie Hansen</b></div>
<div>Applications Group Leader</div>
<div>Flash Center for Computational Science</div>
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<div>On May 8, 2026, at 2:51 PM, Adam F Kowalski <Adam.F.Kowalski@Colorado.EDU> wrote:</div>
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Dear FLASH users,</div>
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I am starting from the magnetoHD/ZPinch example using cartesian coordinates and no circuit with the  following switches:</div>
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-auto -2d +cartesian +pm4dev +usm3t +mtmmmt species=fill,line,vacu +mgd mgd_meshgroups=6 </div>
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I am imposing my own constant magnetic field in the Y-direction in Siminulation_initBlock.F90 by simply setting MAGY_VAR.   However, the imposed magnetic field disappears after the  initial time step.  Do you know what I am doing wrong?  Working with the MHD
 blast wave BlastBS simulation, the imposed magnetic field set in Simulation_initBlock.F90 does not go away after the initial timestep.</div>
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Thank you and I apologize if this is a very naive question,</div>
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Adam K.</div>
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