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Steps to create a quater O grid or Y grid

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Old   June 24, 2009, 23:29
Default Steps to create a quater O grid or Y grid
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Ben
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Hi,

Was wondering if anyone could inform me if I am creating my Y grid correctly as I am getting a non manifold node error when I try to create the boundary layer.

For a background to the project/issue have a look at this discussion

http://www.cfd-online.com/Forums/ansys-meshing/65005-c-gridding-removing-triangular-blocks.html

These errors may be the errors PSYM was referring to at the end of the above thread.

Steps used

1. Delete triangular block inside fin (appendage)
2. Create a new block from
Create block - From vertices/faces and a select quarter o grid.
3. I then select the 6 vertices in shown in the attachment
4. The Y grid is then created.

I continue this for the fwd and aft sections of all appendages and also for blocks through the Fairfield.

Could some on please tell me if this is the correct method and or if am missing a step.

Is there a way to create y grids without deleting the existing blocks?

Any help would be very helpful.

Ben
Attached Images
File Type: gif Y grid steps.gif (19.0 KB, 21 views)
File Type: jpg Vertices to select.jpg (59.2 KB, 62 views)
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Old   June 29, 2009, 00:59
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i got it to work, i needed to extend the y grid into the block below the fin to allow the boundary layer to be generated
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Old   June 29, 2009, 13:33
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Right, you need to continue the new topology right out of the model in both directions.

As for another way to do it, yes, you could split you way to success. The process would involve a series of splits and merge blocks, followed by a collapse blocks to pinch the merge all the way out the model.

There are pro's and cons to each way, but the way you did it is a little more straight forward and not as easy to mess up.

Best regards,

Simon
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Old   April 12, 2012, 05:46
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Some details are also discussed in this thread.

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