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mesh generation help

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Old   August 26, 2010, 11:01
Default mesh generation help
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I am a new STAR-CCM+ user. I have a large model that I'm am trying to get a surface and volume mesh on, but the surface mesh generator keeps cutting off one end of the model and adding holes, kind of like someone had a field day with a chainsaw. I think it's doing this because that section is where two components gradually come together, so the cross section of the space between the parts would look like a long skinny triangle. That geometry continues around the entire top of the model. I've tried tweaking the mesh settings, but have not found a way to mesh up into the small corner. That's really the only trouble spot, everything else seems to mesh fine. Any suggestions would be appreciated. Thanks
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Old   August 27, 2010, 02:10
Default feature curves missing?
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Christian Jungreuthmayer
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Did you create "Feature Curves" for your regions?

Christian
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Old   August 27, 2010, 04:01
Default reduce mesh size or create feature curve
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karthickeyan
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u can eliminate this problem by reducing mesh size(if it possible) or create feature curve
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Old   August 27, 2010, 14:38
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Thanks for the suggestions.

Tron: The regions do have feature curves defining the boundaries but it will not mesh up to the feature curves.

karthickeyan: I have tried finer meshs, some extend further up into the region and some don't for some reason. This is a large model, so I don't want too fine of a mesh beceuase that will increase the computation time. I think we once tried to do a fine mesh on just the region we are trying to fix, but it had issues connecting that to the rest of the model which had a bit courser mesh.
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Old   August 27, 2010, 16:10
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Vinicius Girardi
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Split the faces that are in touch in 2 boundaries and customize the mesh values for both. Use the min and target with the same value (for example 50% for both). Also, if it doesn´t help, disable the automatic surface repair and see what happens.

Are you using surface wrapper?
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Old   August 30, 2010, 01:19
Default try this
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for each boundary u can customize the mesh size so upload snap shot of ur problem
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Old   September 11, 2010, 17:20
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So far I have tried all the suggestions and still can't get a good mesh up into the corner. I got a new higher fidelity model to play with, in an STL format, and I can't even get that to remesh or surface wrap or anything. Sorry, I can not upload any pictures or my model, I can only describe the geometry generically.
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