CFD Online Discussion Forums - [ICEM] Hexa-tet merging

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Hexa-tet merging

Dear All,

I created a tet mesh in one part of the domain and a hexa mesh in another part. Both meshes don't give any error / warning message when checking them. Now, when I merge (edit mesh -> merge nodes -> merge meshes -> merge volume meshes -> merge surface mesh parts) the two meshes at their shared surface, the merging doesn't show any warnings / errors. But the merged mesh check fails with some "Surface orientations ... occupy the same volume" warning.
It looks like the tri mesh / pyramid layer has grown into the hex mesh domain.

The crazy thing is: I have two of these tri mesh domains that nearly look indentical. One mesh merging works as I wrote - the other one fails. I can't see any difference but obvioulsy there is one...

Does anyone have an idea what could be the reason?

some pics please ...

Hi Far,

Alright, here we go!
Right (working) side hexa:
Attachment 26236
Right (working) side tet:
Attachment 26237
Left (not working) hexa:
Attachment 26238
Left (not working) tet:
Attachment 26239

Merging surfaces output:

Code:

330 shells from the variable region deleted

160 bars from the variable region deleted

2105 vertices included

720 vertices removed

expecting 928 pyras, have 0 already

And here the errors after merging:
Attachment 26241
Attachment 26242

Code:

...

Running diagnostics for Surface orientations in subset "all"

    cells near 6.464936 -3.790370 0.372608 occupy the same volume

    cells 2624249 and 1015208

    face node numbers 1561625 1561760 1600603

    opposite vertices 1567686 3474

...