nonAlignedEdge?
 

Dear OpenFOAMers,

I generated a mesh of axisymetric tube using blockMesh. When checked using checkMesh, I got the following message:

***Number of edges not aligned with or perpendicular to non-empty directions: 280332
<<Writing 287066 points on non-aligned edges to set nonAlignedEdges


and checkMesh saved the noneAlignedEdges to polyMesh/sets.

Can someone explain what it means?

When plotting with paraFoam, the mesh looked fine though.

Pei

Hey Fomer,

I got the same problem. Have you gotten a solution to solve this problem.

Kinda regards

Claus

It's quite an old questions but maybe someone has a look here when facing this problem.
I found something about it on the OpenFOAM Wiki website. Paragraph 9 is the important one.

http://openfoamwiki.net/index.php/Si...vaned_diffuser

Lars

I got those 'nonAligned' issues..but after defining my patches properly with b.cs it gets
eliminated.

I also got those issues, but after propertly naming all my patches it disappeared, like ramhari said.

This is probably too late for replying this question. But I hope it will help the others, who will have the same problem in the future. I had the same problem. And I solved the problem by renaming all the points labels.

Hi all,

I had the same issue and I could solve it simply using "flattenMesh" command.

In particular, in my case I generated 2D mesh with extrudeMesh utility (starting from 3D mesh).
Then, "checkMesh" command decteted "Number of edges not aligned with or perpendicular to non-empty directions" error.

I solved it with "flattenMesh" after declaring the empty patches in "constant/polyMesh/boundary" files.

I hope this can help Others.

bye :)

Hi all,

I'm having this exact same problem of the edges no aligned and tried almost everything I saw it could solve the problem and it didn't work out. The checkMesh still complains about those edges.

Can anyone help me?

Hi ltiago94,

if you execute "checkMesh" before "extrudeMesh" command, do you get the error related to non alligned edges?

Hello, I was able to solve this issue. After snappyhexmesh I ran flattenMesh. Then created a folder which the extrudeMesh was getting the information of. I copied the constant and system folder to that new folder and erased the polymesh case inside the original constant. After that i ran extrudeMesh and it was ok.

Thanks

This happens if your mesh is more than one cell layer thick in the rotation direction.