GeezerVison is showing github.com — Improving Mesh Quality of Turbulent Onera M6 mesh · Issue #59 · su2code/Tutorials
Improving Mesh Quality of Turbulent Onera M6 mesh #59
Description
Hi guys,
I was looking for a hex mesh of the Onera M6 airfoil and came across your tutorial + provided grid. I encounter the issue, though, that a few elements are distorted, i.e., the hexes/quads are effectively degenerated to prisms/triangles. When executing the example with SU2_CFD you actually get a corresponding warning:
------------------- Geometry Preprocessing ( Zone 0 ) -------------------
Three dimensional problem.
46417 grid points.
43008 volume elements.
3 surface markers.
2560 boundary elements in index 0 (Marker = FARFIELD).
1408 boundary elements in index 1 (Marker = WING).
2688 boundary elements in index 2 (Marker = SYMMETRY).
43008 hexahedra.
Setting point connectivity.
Renumbering points (Reverse Cuthill McKee Ordering).
Recomputing point connectivity.
Setting element connectivity.
Checking the numerical grid orientation.
>>> WARNING: 18 HEXAHEDRON, volume elements are distorted.
It was not possible to determine if their orientation is correct.
There has been a re-orientation of 4 QUADRILATERAL surface elements.
>>> WARNING: 1 QUADRILATERAL surface elements are distorted.
It was not possible to determine if their orientation is correct.
Here are two screenshots of the troubling quad
So my question is twofold:
- Do you also provide the corresponding grid generation software, s.t. I can try improving the grid myself?
- Is there a way to access the (possibly) improved grid? Based on
There has been a re-orientation of 4 QUADRILATERAL surface elements. I have hope that the grid is improved at runtime. Using that grid might actually be good enough for me.
Best,
Daniel
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bigfooted commented on Feb 5, 2025
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