open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello everyone

I'm building a mesh on Blue Kenue with a submesh I extracted from another larger model (which works without any problem).

When I tried to open the selafin file with FUDAA, I got this message ""Erreur génération frontière : le point indice X n'a pas de voisin" (boundary issue : node X has no neighbour). Looking for node X back in BK, I realized it was inside the submesh.

I got this message a few times in a row, the node being every time inside the submesh. Sometimes there were meshes crossing each other (with one being from the submesh), sometimes there were duplicate points (even if I had deleted all unused nodes before generating the selafin), and most puzzling, sometimes I don't see any issue (if I delete the node, all elements attached disappear and there's no duplicate node).

So I was wondering :

1/ why is BK modifying the geometry of the submesh and how to prevent it ?

2/ Is there a way, either in BK or Fudaa, to get a list of all points leading to this very kind of error, instead of having to go back to BK, fix the point, generate a new selafin file, going back to Fudaa to open it, only to get the same message for another point and so on...

Any help will be greatly appreciated.

Best regards

First of all, This post belongs under the Blue Kenue topic.

Secondly, if you post the relevant files here it will be easier to help you.

Cheers... Martin

Sorry, I'll move the post. Regarding the file, I'll have to check if I can post it there.

Cheers

Hello,

I have now moved the question.

Good luck.
Sebastien.

Hi everyone

I just retake this topic because I got this error as well and I didn find the new location of the topic in Blue Keneu

In my case I use 3 submeshes into a big one. I first merge the 3 fine meshes and run t3 mesh generator with the 1 merge mesh and the outline of the big domain. Then I got the problem of errors and when I verified the mesh there where crossing lines all over the new mesh.

I then run t3mesh generator adding individually the 3 meshes into the submeshes and the outline domain. Then the mesh was done correctly

Hope it helps

Cheers

Victor