[FLASH-USERS] flash-users Digest, Vol 195, Issue 9

[lizy]

Dear Flash Developer,
We will appreciate it if you can tell us when flash4.8 will be released.

Thanks for your selfless dedication!
Lizy


------------------ Original ------------------
From:                                                                                                                        "flash-users"                                                                                    <flash-users-request at flash.rochester.edu>;
Date: Thu, Mar 21, 2024 00:00 AM
To: "flash-users"<flash-users at flash.rochester.edu>;

Subject: flash-users Digest, Vol 195, Issue 9



Send flash-users mailing list submissions to
	flash-users at flash.rochester.edu

To subscribe or unsubscribe via the World Wide Web, visit
	https://flash.rochester.edu/mailman/listinfo/flash-users
or, via email, send a message with subject or body 'help' to
	flash-users-request at flash.rochester.edu

You can reach the person managing the list at
	flash-users-owner at flash.rochester.edu

When replying, please edit your Subject line so it is more specific
than "Re: Contents of flash-users digest..."


Today's Topics:

   1. Re:  fullaniso magnetic diffusion in the ZPinch example
      problem (Hansen, Eddie)


----------------------------------------------------------------------

Message: 1
Date: Tue, 19 Mar 2024 22:43:15 +0000
From: "Hansen, Eddie" <ehansen at pas.rochester.edu>
To: Heath LeFevre <hjlefe at umich.edu>,
	"flash-users at flash.rochester.edu" <flash-users at flash.rochester.edu>
Subject: Re: [FLASH-USERS] fullaniso magnetic diffusion in the ZPinch
	example problem
Message-ID:
	<BN8PR07MB6162699B03CD0100BD507084F52C2 at BN8PR07MB6162.namprd07.prod.outlook.com>
	
Content-Type: text/plain; charset="windows-1252"

Hi Heath,

It?s possible that there is a bug in the implicit solver. We have some significant updates coming for implicit magnetic diffusion in FLASH 4.8, but only for the ?parallel? or ?perpendicular? forms. We won?t be supporting implicit diffusion for the ?fullaniso? form just yet. You would need to use the explicit solver for that.

--
Eddie Hansen
Applications Group Leader
Flash Center for Computational Science


From: flash-users <flash-users-bounces at flash.rochester.edu> on behalf of Heath LeFevre <hjlefe at umich.edu>
Date: Tuesday, March 19, 2024 at 6:19 PM
To: flash-users at flash.rochester.edu <flash-users at flash.rochester.edu>
Subject: [FLASH-USERS] fullaniso magnetic diffusion in the ZPinch example problem
Hello,

I am trying to use the anisotropic magnetic resistivity in the ZPinch example problem. When I change resistivityForm to "fullaniso", the magnetic fields, and magnetic energy, go to zero. When resistivityForm is "perpendicular" there is heating and magnetic fields generated from the current.dat input file.

I changed the problem to 2D, so that having parallel and perpendicular terms make sense. I am using a uniform grid and the implicit solver. I attached my flash.par file, the log file, and the .dat file.

I read sections 18.1.6 and 14.3.5.3 of the manual, but I can't see what I'm doing wrong. It seems like changing from "perpendicular" to "fullaniso" should be all that is necessary to add the terms when solving the equations on a uniform grid. I also looked through the diff_advanceMag.F90 and DaviesWen MagneticResistivity_fullState.F90 files to see if there was an issue, but I couldn't find anything.

Does the problem have to do with using the implicit solver?

I would be very happy to hear suggestions from folks who have had success with this.

Thanks,
Heath
--
Heath LeFevre
He/Him/His
NSF ASCEND Postdoctoral Fellow
University of Michigan | Nuclear Engineering and Radiological Sciences
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://flash.rochester.edu/pipermail/flash-users/attachments/20240319/21b0b111/attachment-0001.htm>

------------------------------

Subject: Digest Footer

_______________________________________________
flash-users mailing list
flash-users at flash.rochester.edu
https://flash.rochester.edu/mailman/listinfo/flash-users


------------------------------

End of flash-users Digest, Vol 195, Issue 9
*******************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://flash.rochester.edu/pipermail/flash-users/attachments/20240321/7515112a/attachment.htm>