[FLASH-USERS] MHD simulation of plasma focus machine

[ddk172 at edu.hmu.gr]

Hello everyone!
I am trying to model a plasma focus machine using 2D flash, using a 
modified version of Z-Pinch example of FLASH4.7 version. Currently, i am 
running some simulations using Deuterium equation of state 
DD-006-imx.cn4 for plasma and vacuum. The density is very low (1.2e-6 
gr/cm^3) and i assume is comparable to the vacuum density of MHD 
simulations. I have assumed a magnetic field deduced from the current i 
measured at the experiment, the initial conditions can be seen on 
attached figure. Early on the simulation( ~20ns) a problem arise that 
looks like numerical instability that is not familiar to me, as seen at 
the attached figure of density. This problem appears when magnetic 
resistivity flag is set true. Is anyone familiar with this kind of 
problem? If so, ask me for any additional information you need.

Thanks in advance

Christos Karvounis
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