[julian_007]

Dear Community,

as a ICEM beginner I have the following problem.
As you can see in the picture I want to mesh a curved inlet of an seal, best practice example is shown on the left.



On the right, part of my blocking strategy is to associate the diagonal line to the curve of the inlet, shown by the small arrow. On the lines I set the desired numbers of nodes, e.g. 10, 5, 6, "copy parameters to all parallel edges" is turned off.
The number of nodes 14 is caculated by icem itself, also the red number 6.
My question is why the red number is not higher than 6?

The third picture shows the actual mesh, with small elements, which cause a failed mesh.

Has someone an idea how can I reach the desired mesh, like in the first picture?

Thank you for your help!

[alainislas]

julian_007

Could you re-load the pictures? I think they were not properly attached.

[julian_007]

Originally Posted by alainislas

julian_007

Could you re-load the pictures? I think they were not properly attached.

Yes, of course here seperatly:

1. picture: https://www.cfd-online.com/Forums/me...sired-mesh.png
2. picture: https://www.cfd-online.com/Forums/me...odes-lines.png
3. picture: https://www.cfd-online.com/Forums/me...-mesh-fail.png

[Stel]

Still can't see any of the images.

[aero_head]

Julian,

Please follow the steps here: http://www.cfd-online.com/Wiki/Ansys...ible_answer.3F to attach your photos.

[julian_007]

ICEM Mesh Calculation.jpg

now it should work, I hope!

[aero_head]

Looks good now, Julian.

Which mesh laws are you using? As well, are you using linked bunching or not?

Just trying to get a sense of the steps you performed to create the mesh.

[Stel]

Originally Posted by julian_007

The number of nodes 14 is caculated by icem itself, also the red number 6.
My question is why the red number is not higher than 6?

Because it seems that, with your current blocking strategy, the vertical edge on the left-hand side is parallel to the vertical edge on the right-hand side (which also has 6 nodes). Turning the "Copy parameters to all parallel edges" option off only avoids ICEM to copy the mesh law, not the number of nodes (in a pure structured mesh, parallel edges will have equivalent number of nodes).

The example you have shown uses non-mapped blocks. I would prefer and O-Grid strategy around the round corner on the upper right-hand side.

[julian_007]

Originally Posted by Stel

Because it seems that, with your current blocking strategy, the vertical edge on the left-hand side is parallel to the vertical edge on the right-hand side (which also has 6 nodes). Turning the "Copy parameters to all parallel edges" option off only avoids ICEM to copy the mesh law, not the number of nodes (in a pure structured mesh, parallel edges will have equivalent number of nodes).

The example you have shown uses non-mapped blocks. I would prefer and O-Grid strategy around the round corner on the upper right-hand side.

Thank you Stel, for the answer!
Now I'm this far with the mesh, second picture. I created a "cross" in the midpoint of the curve, as you can see in the first picture.

cross_in_curvemidpoint.jpg
Mesh_round_part.jpg

On the right the mesh volumes are still getting very small unfortunely...
how can this be avoided? How do I implement an O Grid in this round edge?

(I didn't use any bunching laws, just BiGeometric @aero_head

Thanks in advance!

[Stel]

Could you give more details about the geometry?

[alainislas]

From one of your previous pictures, you need a L-grid at the round corner. You can introduce some splits as illustrated. Just extrapolate this strategy for your 3D block