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[ICEM] Mesh generation for solid layer (Outer wall of a pipe)

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Old   September 23, 2013, 14:03
Default Mesh generation for solid layer (Outer wall of a pipe)
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Daniel
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Hello guys

I have just started to work with ICEM and I have a problem with meshing the solid layer.

I have worked with Gambit but I dont know how to do the same in ICEM.
I have attached the image of the geometry, inside of the tube is empty and I am just planning to mesh the layer.


regards
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File Type: jpg 2.JPG (47.9 KB, 21 views)
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Old   September 24, 2013, 11:11
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Block the model normally (see tutorials for tubes) from the outer surface.

Then add an Ogrid (radial blocks added with just an easy selection and apply).

Split the Ogrid to create an edge for the inside of the solid wall.

Right click on parts and create a material (SOLID), use the option to add blocking material and select the outer blocks. In fact, you can use "index control" to make that selection very easy.


In this similar pic that I happen to have handy, there were several layers of wall... One is turned off.
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Old   September 24, 2013, 11:29
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Thank you very much, I will try your suggestion now.

Would you please explain the split step?

regards
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Old   September 24, 2013, 14:09
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I have attached the project file.
I think I have managed to get to the second step (O-grid)

But as a new ICEM user, I dont understand how to split the block in a correct way.

any help would be appreciated.

regards
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Old   September 24, 2013, 14:33
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I had some progress with trial and error, but ICEM is still meshing the inside of the pipe.

thanks

edit: I have fixed the error. Actually after blocking ICEM automatically created "SOLID" part. I had to create a new part with outer blocks.

@ PSYMN: thank you very much

----------

Now I have a new problem, the outer wall is fine but somehow the internal wall does have a problem.
blue is outer wall and purple is the internal wall.
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Old   September 24, 2013, 15:16
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The block faces are projecting to the nearest surface. In some cases, that means the inner block faces are projecting to the outer surfaces or vice versa...

You can fix this a few different ways, but the easiest is just to change the face to surface association of the problem faces...

You already have the inner and outer surfaces in different parts. You can adjust the index control so you only see one layer of edges (right click on blocking in the tree to access the index control and then adjust the o3 index range until you just see one layer... This is just to make selection easier in the next step ) and associate the faces in that area to the correct part...

In your case, the outer faces are fine because the outer surface is nearest. However, the inner layer faces are actually outside and project to the closest surface, which is the outer surface... You want to reduce the index control until you see just that inner layer (for easy selection) and then associate those faces to that surface part. Another option would be to add splits across your model to better control the edges in that region... Then you wouldn't have long edges passing closer to the outer surface than the inner surface...
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Old   September 24, 2013, 16:05
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Quote:
Originally Posted by PSYMN View Post
The block faces are projecting to the nearest surface. In some cases, that means the inner block faces are projecting to the outer surfaces or vice versa...

You can fix this a few different ways, but the easiest is just to change the face to surface association of the problem faces...

You already have the inner and outer surfaces in different parts. You can adjust the index control so you only see one layer of edges (right click on blocking in the tree to access the index control and then adjust the o3 index range until you just see one layer... This is just to make selection easier in the next step ) and associate the faces in that area to the correct part...

In your case, the outer faces are fine because the outer surface is nearest. However, the inner layer faces are actually outside and project to the closest surface, which is the outer surface... You want to reduce the index control until you see just that inner layer (for easy selection) and then associate those faces to that surface part. Another option would be to add splits across your model to better control the edges in that region... Then you wouldn't have long edges passing closer to the outer surface than the inner surface...

Man your brilliant

Thank you very much for your attention
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Old   September 24, 2013, 21:04
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Can you show us a final cross section?
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Old   September 25, 2013, 03:33
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Quote:
Originally Posted by PSYMN View Post
Can you show us a final cross section?
yes, you can see the result in the attachment.
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File Type: jpg 4.JPG (64.4 KB, 6 views)
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