[FLASH-USERS] question about Zpinch example

[Necdet Aslan]

Hi
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

Prof. Necdet Aslan

PS. You can check my LinkedIn page for a little more detail

On Fri, May 8, 2026 at 12:39 Hansen, Eddie <ehansen at pas.rochester.edu>
wrote:

> 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.
>
> —
> *Eddie Hansen*
> Applications Group Leader
> Flash Center for Computational Science
>
> On May 8, 2026, at 2:51 PM, Adam F Kowalski <Adam.F.Kowalski at Colorado.EDU>
> wrote:
>
> Dear FLASH users,
>
> I am starting from the magnetoHD/ZPinch example using cartesian
> coordinates and no circuit with the  following switches:
>
> -auto -2d +cartesian +pm4dev +usm3t +mtmmmt species=fill,line,vacu +mgd
> mgd_meshgroups=6
>
> 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.
>
> Thank you and I apologize if this is a very naive question,
>
> Adam K.
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