[TOM01]

Hello,

does anybody know wether it is possible to use region wise refined blockmeshes as input for snappy hex mesh.

Or more general: Is it possible to use as input for the castellation other meshes than regular hex meshes?

I set up a refined blockmesh as in the attached picture.

But snappy hex mesh says:

--> FOAM FATAL ERROR:
cell 1590 of level 0 uses more than 8 points of equal or lower level
Points so far:8(2024 2025 2035 2036 2134 2135 2145 2146)

The cell is in first layer of the refined part of the mesh. (2nd picture below)
refinedZylinder.png
refinedZylinder1_cell1590.png

[Antimony]

Hi,

From what I have seen, you need to have pretty much only hexes to be able to run snappyHexMesh (anything more than 8 vertices for a block and it doesn't work)

Refining the original mesh in only particular directions over only a portion of the mesh does not allow you to run snappyHexMesh (refining leads to more vertices within the same block and so it shows that error)

Hope this helps.

Cheers,
Antimony

[TOM01]

Thank you Antimony.

Meanwhile I learned that the same what I wanted to do I can do with dedicated refinement zones in snappyHexMeshDict.

Do you know if it is possible in snappy to define that zones are getting refined only in x/y and not in z direction?

[Antimony]

Hi,

Yes, refinementRegions would help you refine a selected region. Your cells will need to have at most 8 vertices for this.

And nope. AFAIK, snappy does refinement in all three directions and you can't limit it to any particular direction(s).

Cheers,
Antimony

[TOM01]

Thanks a again.
Meanwhile I could get a working mesh with acceptable refinement.