MergeMeshes and mesh format from 14x 15

pitmanm · July 23, 2008, 10:09

mergeMeshes seems to not work in OF-1.5 on some simple test cases which work fine in OF-1.4.1. This may also apply to stitchMesh and some other mesh utilities.

When I make two very simple meshes with blockMesh and then try to "mergeMeshes" it errors with:

"Patch face has got a neighbour. Patch ID: 6. This is not allowed."

But these same cases merged fine in OF-1.4.1 (when starting from scratch with blockMeshDict. I cannot run OF-1.5 meshes in OF-1.4.1... that causes a memory error to appear).

The problem seems to be with the way the mesh is defined and handled in OF-1.5 (differently to OF-1.4.x)... which also would explain why I can't run 1.4.x meshes in 1.5 and vice-versa.

Has anyone else encountered these issues? I have tried my best to get in there and fix it but just don't seem to be getting anywhere at the moment.

Any advice on this issue would be greatly appreciated.

Regards, Mark

lgarriso · July 25, 2008, 15:19

I was not able to use mergePatchPairs in 1.5. It told me that it wasn't supported, although it still appears in the documentation.

andersking · July 27, 2008, 01:15

I think I have fixed it - seems to work after a simple test anyway.
mergePolyMesh.C now only adds neighbours if the face isn't on a patch. Could someone who knows more about the internals check that this is the correct fix - Also, I haven't checked any changes to Zones/Regions.

Cheers
Andrew

mergePolyMesh.C.diff

pitmanm · July 28, 2008, 20:59

Thanks Andrew! That seems to have done the trick.

bastil · September 23, 2008, 15:48

I can report the same behaviour for stitchMesh. I tried the wiki-testcase (http://openfoamwiki.net/index.php/Im...ith_interfaces) with both 1.5 and 1.4.1 and it works with 1.4.1. but not with 1.5.

alexm · September 24, 2008, 10:09

yes, me too.
After successfully merging a pair of meshes with OF-1.5 (i've patched and recompiled mergeMeshes - Thanks for this patch!), stitching ended with "Patch face has got a neighbour This is not allowed."

andersking · September 24, 2008, 10:50

Hi,
I think there is a number of these 'neighbour' bugs still hanging around, stichMesh (I think) uses the polytopochanger libraries to adjust the mesh.

see
http://www.cfd-online.com/OpenFOAM_D.../126/9192.html

unfortunately I haven't got the time (or code familiarity) at the moment to chase all of these up.

Cheers
Andrew

bastil · November 19, 2008, 07:53

I am wondering if this problem has been fixed? Does it work for the current git-version?

Regards

andersking · November 20, 2008, 01:08

Hi,
I don't think so. I've looked through the changes in the git history and the only changes are those in these two threads.

It's still a bit beyond my capabilities, and I haven't had a chance to investigate further.

Regards,
Andrew

srikara · June 18, 2009, 07:35

Hi foamers,
I am trying to merge two meshes into one using the stitchMesh option. But I get the message:
"Patch face has got a neighbour. Patch ID: 6. This is not allowed."
Does anybody have an idea how to solve this problem?

Regards,
Srikara

hansel · June 23, 2009, 16:41

I was having the same problem with mergeMesh and the patch fixed the problem. I just download OF1.5 about a month ago, and I see that this patch has been out for almost a year. Is there a site for patches / updates to OF that I don't know about?

mattijs · June 24, 2009, 08:13

I reinstated the old stitchMesh functionality just now. I've tested it on a few simple cases.

hansel · June 24, 2009, 11:34

Quote:

Originally Posted by mattijs

I reinstated the old stitchMesh functionality just now. I've tested it on a few simple cases.

Thanks.. Does that mean it's in the 1.5 release or the 1.5-dev release? (or something else?)

mattijs · June 24, 2009, 11:59

It is in the 1.5.x git repository.

hansel · July 4, 2009, 00:55

It worked on my case. Thanks!

July 23, 2008, 10:09	mergeMeshes seems to not work	#1
pitmanm New Member Mark Pitman Join Date: Mar 2009 Location: Perth, Western Australia, Australia Posts: 7 Rep Power: 17	mergeMeshes seems to not work in OF-1.5 on some simple test cases which work fine in OF-1.4.1. This may also apply to stitchMesh and some other mesh utilities. When I make two very simple meshes with blockMesh and then try to "mergeMeshes" it errors with: "Patch face has got a neighbour. Patch ID: 6. This is not allowed." But these same cases merged fine in OF-1.4.1 (when starting from scratch with blockMeshDict. I cannot run OF-1.5 meshes in OF-1.4.1... that causes a memory error to appear). The problem seems to be with the way the mesh is defined and handled in OF-1.5 (differently to OF-1.4.x)... which also would explain why I can't run 1.4.x meshes in 1.5 and vice-versa. Has anyone else encountered these issues? I have tried my best to get in there and fix it but just don't seem to be getting anywhere at the moment. Any advice on this issue would be greatly appreciated. Regards, Mark

July 25, 2008, 15:19	I was not able to use mergePat	#2
lgarriso New Member Laura Garrison Join Date: Mar 2009 Posts: 1 Rep Power: 0	I was not able to use mergePatchPairs in 1.5. It told me that it wasn't supported, although it still appears in the documentation.

July 27, 2008, 01:15	I think I have fixed it - seem	#3
andersking Member Andrew King Join Date: Mar 2009 Location: Perth, Western Australia, Australia Posts: 82 Rep Power: 17	I think I have fixed it - seems to work after a simple test anyway. mergePolyMesh.C now only adds neighbours if the face isn't on a patch. Could someone who knows more about the internals check that this is the correct fix - Also, I haven't checked any changes to Zones/Regions. Cheers Andrew mergePolyMesh.C.diff __________________ Dr Andrew King Fluid Dynamics Research Group Curtin University

July 28, 2008, 20:59	Thanks Andrew! That seems to	#4
pitmanm New Member Mark Pitman Join Date: Mar 2009 Location: Perth, Western Australia, Australia Posts: 7 Rep Power: 17	Thanks Andrew! That seems to have done the trick.

September 23, 2008, 15:48	I can report the same behaviou	#5
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	I can report the same behaviour for stitchMesh. I tried the wiki-testcase (http://openfoamwiki.net/index.php/Im...ith_interfaces) with both 1.5 and 1.4.1 and it works with 1.4.1. but not with 1.5.

September 24, 2008, 10:09	yes, me too. After successfu	#6
alexm New Member Axel Mohr Join Date: Mar 2009 Location: Kiel, Schleswig-Holstein, Germany Posts: 24 Rep Power: 17	yes, me too. After successfully merging a pair of meshes with OF-1.5 (i've patched and recompiled mergeMeshes - Thanks for this patch!), stitching ended with "Patch face has got a neighbour This is not allowed."

September 24, 2008, 10:50	Hi, I think there is a number	#7
andersking Member Andrew King Join Date: Mar 2009 Location: Perth, Western Australia, Australia Posts: 82 Rep Power: 17	Hi, I think there is a number of these 'neighbour' bugs still hanging around, stichMesh (I think) uses the polytopochanger libraries to adjust the mesh. see http://www.cfd-online.com/OpenFOAM_D.../126/9192.html unfortunately I haven't got the time (or code familiarity) at the moment to chase all of these up. Cheers Andrew __________________ Dr Andrew King Fluid Dynamics Research Group Curtin University

November 19, 2008, 07:53	I am wondering if this problem	#8
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	I am wondering if this problem has been fixed? Does it work for the current git-version? Regards

November 20, 2008, 01:08	Hi, I don't think so. I've lo	#9
andersking Member Andrew King Join Date: Mar 2009 Location: Perth, Western Australia, Australia Posts: 82 Rep Power: 17	Hi, I don't think so. I've looked through the changes in the git history and the only changes are those in these two threads. It's still a bit beyond my capabilities, and I haven't had a chance to investigate further. Regards, Andrew __________________ Dr Andrew King Fluid Dynamics Research Group Curtin University

June 18, 2009, 07:35	stitchMesh problem	#10
srikara New Member Srikara Mahishi Join Date: Mar 2009 Location: Bangalore Posts: 22 Rep Power: 17	Hi foamers, I am trying to merge two meshes into one using the stitchMesh option. But I get the message: "Patch face has got a neighbour. Patch ID: 6. This is not allowed." Does anybody have an idea how to solve this problem? Regards, Srikara

June 23, 2009, 16:41		#11
hansel Senior Member Steve Hansel Join Date: Jun 2009 Location: Colorado, USA Posts: 112 Rep Power: 16	I was having the same problem with mergeMesh and the patch fixed the problem. I just download OF1.5 about a month ago, and I see that this patch has been out for almost a year. Is there a site for patches / updates to OF that I don't know about?

June 24, 2009, 08:13		#12
mattijs Senior Member Mattijs Janssens Join Date: Mar 2009 Posts: 1,419 Rep Power: 26	I reinstated the old stitchMesh functionality just now. I've tested it on a few simple cases.

June 24, 2009, 11:59		#14
mattijs Senior Member Mattijs Janssens Join Date: Mar 2009 Posts: 1,419 Rep Power: 26	It is in the 1.5.x git repository.

July 4, 2009, 00:55		#15
hansel Senior Member Steve Hansel Join Date: Jun 2009 Location: Colorado, USA Posts: 112 Rep Power: 16	It worked on my case. Thanks!

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