[phsieh2005]

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

[idrama]

Hey Fomer,

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

Kinda regards

Claus

[LarsPT]

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

[ramhari]

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

[bernarde]

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

[Yingchen]

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.

[tom_rob]

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

[ltiago94]

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?

[tom_rob]

Hi ltiago94,

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

[ltiago94]

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

[v199ah]

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