[FLASH-USERS] Unexpected behavior of the BDRY variable

[Reyes, Adam]

Hi Chris,

BDRY information is only available to the hydrodynamics solvers in FLASH. Any non-ideal physics, such as resistivity, aren’t aware of BDRY cells. If you don’t want magnetic field to diffuse into your BDRY cells you can try setting the resistivity in those cells to be much lower compared to the surrounding plasma.
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Adam Reyes


Code Group Leader, Flash Center for Computational Science  
Research Scientist, Dept. of Physics and Astronomy
University of Rochester
River Campus: Bausch and Lomb Hall, 369  
500 Wilson Blvd. PO Box 270171, Rochester, NY 14627
Email adam.reyes at rochester.edu
Web https://flash.rochester.edu
 (he / him / his)

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> On Sep 12, 2023, at 1:32 PM, ddk172 at edu.hmu.gr wrote:
> 
> Hello Flash users,
> 
> I used the variable BDRY in Flash4.7 version in order to have a rigid body in some specific regions of my computational domain, and it was working as intended. During the tests I used the unsplit staggered mesh MHD solver + magnetic resistivity. Now, I am trying to replicate the results in Flash4.7.1 version and the magnetic field appears to be advected and/or diffused at the same regions. Do you know how can I solve this problem? I attach a figure that you see the problem. In the left one you can see 4.7.1 version and in the right the 4.7 version.
> 
> Thanks in advance
> 
> Chris Karvounis<flash4.7.1.png>_______________________________________________
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> flash-users at flash.rochester.edu
> 
> For list info, including unsubscribe:
> https://flash.rochester.edu/mailman/listinfo/flash-users

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