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[ANSYS Meshing] Mesh failed error:surface mesh is intersecting or close to intersecting

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Old   April 17, 2018, 02:28
Default Mesh failed error:surface mesh is intersecting or close to intersecting
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I am trying to mesh rotor blade domain but mesh fails and the following error messages appear:
message 1:
Ansys mesh the surface mesh is intersecting or close to intersecting making it difficult to create a volume mesh please adjust the mesh size or adjust the geometry to fix the problem.
message 2:
A mesh could not be generated using the current meshing options and settings

See screenshot attached
If anyone knows how to solve this your help will be much appreciated
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Old   May 31, 2018, 23:32
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Hi!
I encounterd same error message two-times by different cases in these days.

In my first case, one part of geometry data has intersecting faces, and this caused the error.
The location of the intersections can be indicated graphically in the [Geomery] view by selecting [Show problematic geometry] option from right-click menu on the error message item.
SpaceClaim is very useful to check and fix such geometric issues up.

In my second case, no problem was found whole of the geometry before meshing. But, after meshing, the error message was shown up.
The location of intersections was on connected surfaces of shape primitives belong to the same part.
In this case, you might be able to avoid the error by setting "Advancing front" to [Triangle Surface Mesher] avoids the error temporarily, though, which causes increse number of element.
I think modifying the part's topology is only way to except the fundamental error factor.
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Old   May 20, 2019, 07:29
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Quote:
Originally Posted by T.Nagata View Post
Hi!
I encounterd same error message two-times by different cases in these days.

In my first case, one part of geometry data has intersecting faces, and this caused the error.
The location of the intersections can be indicated graphically in the [Geomery] view by selecting [Show problematic geometry] option from right-click menu on the error message item.
SpaceClaim is very useful to check and fix such geometric issues up.

In my second case, no problem was found whole of the geometry before meshing. But, after meshing, the error message was shown up.
The location of intersections was on connected surfaces of shape primitives belong to the same part.
In this case, you might be able to avoid the error by setting "Advancing front" to [Triangle Surface Mesher] avoids the error temporarily, though, which causes increse number of element.
I think modifying the part's topology is only way to except the fundamental error factor.

I also had the same issue with a 2D mesh to be exported to Ansys Fluent. Although meshing was done successfully without warnings or errors, the mesh export to Fluent (via Workbench) failed when I tried to export certain named selections that appeared to have an intersection with other named selections (although there was no such error/ warning!). Tri-Meshing solved the problem for me, which is but only a workaround...

Thanks again for sharing the solution!
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