ERROR: ZONE AA meets ZONE BB at the boundary of MESH CC and MESH DD
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Bryan Klein
Sep 13, 2021, 8:00:53 PM9/13/21
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I've been messing with this case for a while and I am not seeing the error. I don't have any zones defined and I am getting many zone errors.
Can you run this case in FDS 6.7.6 without error? I've tried from PyroSim and the Command Line and still get errors like this...
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 1 meets ZONE 0 at the boundary of MESH 1 and MESH 3
ERROR: ZONE 39 meets ZONE 0 at the boundary of MESH 4 and MESH 1
ERROR: ZONE 34 meets ZONE 0 at the boundary of MESH 4 and MESH 2
Thank you,
- Bryan
Kevin McGrattan
Sep 14, 2021, 9:28:29 AM9/14/21
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I'll take a look.
Kevin McGrattan
Sep 14, 2021, 9:57:28 AM9/14/21
to fds...@googlegroups.com
There appears to be a sealed duct (left) leading from the mesh of fine resolution to the mesh of coarse resolution. FDS is automatically finding ZONEs but is confused here. In the past few versions of FDS, there is a ZONE finding algorithm because in a case like this it would be very difficult for the user to do it. If these ZONEs are not found, the air within the ZONE can heat up and expand, which wreaks havoc with the pressure solver. This was a common cause of numerical instability in the past.
I don't know off the top of my head how to fix this. My first inclination would be to seal the duct and prevent it from opening up to the coarse grid. It would be fine as a sealed duct within the fine grid.
My guess is that the ZONE finding algorithm crawls from one mesh to the other not accounting for the change in grid size. The solution might be to force the crawler to proceed on separate paths. I'll think about it. In the meantime, you have an unphysical geometry to fix.
Bryan Klein
Sep 14, 2021, 11:25:08 AM9/14/21
to FDS and Smokeview Discussions
Thank you,
I will look at the geometry and see if there is something that we can do better in PyroSim to identify/avoid these issues in the pre-processor.
-Bryan
Bryan Klein
Sep 14, 2021, 11:35:25 AM9/14/21
to FDS and Smokeview Discussions
It turns out that this is the inside of a hollow metal window frame.
The frame snaps to a thin OBST in the coarse mesh and stays "hollow" in the fine mesh.
If I 'Thicken' all geometry, it seems to seal the ends and the simulation runs without error.
Thank you again for helping me identify this issue.
-Bryan
Kevin McGrattan
Sep 14, 2021, 11:51:04 AM9/14/21
to fds...@googlegroups.com
Yup, this is the trouble with complex geometry and grid size changes. If the interior of this frame or duct is not relevant, you might consider making the whole thing solid.
Justin Milne
Sep 14, 2021, 11:53:18 AM9/14/21
to fds...@googlegroups.com
For sure! Maybe a valuable adder to the Import_Cad tutorial 😉.
Have a good one, Bryan, and thanks again to you and Kevin!
From: fds...@googlegroups.com <fds...@googlegroups.com> on behalf of Bryan Klein <kl...@thunderheadeng.com>
Sent: Tuesday, September 14, 2021 10:35:25 AM
To: FDS and Smokeview Discussions <fds...@googlegroups.com>
Subject: Re: [fds-smv] ERROR: ZONE AA meets ZONE BB at the boundary of MESH CC and MESH DD
Sent: Tuesday, September 14, 2021 10:35:25 AM
To: FDS and Smokeview Discussions <fds...@googlegroups.com>
Subject: Re: [fds-smv] ERROR: ZONE AA meets ZONE BB at the boundary of MESH CC and MESH DD
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