[FLASH-USERS] [External Sender] Fwd: Z-pinch Test Problem

[Tranchant Victor]

Hi Erik,
 
In FLASH, for cylindrical coordinates, magz corresponds to the azimuthal magnetic field (r,z,theta) = (x,y,z).
 
Victor Tranchant

Le Mercredi, Février 05, 2025 05:22 CET, Erik McKee <mckeee6 at gmail.com> a écrit:

 Paul, Thank you very much.  This fixed my issue.  Its funny though that the plot to be reproduced in the users manual is the azimuthal magnetic field but the only variable in the .par file is the magz.  
  Erik
 

 On Tue, Feb 4, 2025 at 12:48 PM Paul Campbell <Paul.Campbell at zap.energy> wrote:
 
Hi Erik,
 
If you’re running FLASH 4.8 try changing the parameter xr_boundary_type = “no current” to xr_boundary_type = “circuit” (this should be in the hydro parameters section of the .par file).  I think boundary conditions changed between FLASH versions and this changed fixed the issue you’re having for me.
Paul Campbell

 
 
From: flash-users <flash-users-bounces at flash.rochester.edu> On Behalf Of Erik McKee
Sent: Monday, February 3, 2025 6:37 PM
To: flash-users at flash.rochester.edu
Subject: [External Sender] [FLASH-USERS] Fwd: Z-pinch Test Problem
 
Hello Flash Users,
 
I have recently installed the new version of Flash and I am trying to get the Z-pinch example running.  Everything compiles and runs ok however, when I use python to parse the h5 files and make a movie of them, this is the result.  It appears that the current file did not load because the density wave moves away from the z-axis and not towards it.  Additionally, when I plot the magp and magz values, they are all zeros.  The only step I differed then on the users manual was
 
./setup -auto magnetoHD/ZPinch -1d +cylindrical +ug +usm3t +mtmmmt \
species=fill,line,vacu +mgd mgd_meshgroups=6 +hdf5typeio
 
I had to leave out the +hdf5typeio because I did not have the parallelized version of hdf5 of this and it would not compile.  Is this the reason for the test problem not making sense. 
 
Thank you for the help,
Erik
 

 



 
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