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July 8, 2010, 09:11 |
Ansys 12.1 - Quality mesh -
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#1 |
Member
Join Date: Oct 2009
Location: Italy
Posts: 88
Rep Power: 16 |
hi
i have a 3D case and i have generate the mesh. if i analyze the result of the mesh i look that the quality it isn't the best. how can improve the mesh quality? now i used a size function: curvature and fine type of mesh; i think the problem is a pipe with a low thikness 0,2 mm so i have used a body size with element size to 0.00065 m. naturally if i used a size more little that now the number are too big. any suggestions are welcome thank you |
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July 16, 2010, 12:59 |
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#2 |
New Member
Karan Anand
Join Date: Feb 2010
Posts: 23
Rep Power: 16 |
What mesh software are you using? CFX mesher (from Workbench) or ICEM or Gambit?
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July 16, 2010, 16:44 |
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#3 |
New Member
Shashank
Join Date: Jul 2010
Posts: 18
Rep Power: 15 |
I have a similar issue with a Delta Wing. The enormous aspect ratio is causing problems, I am using ICEM for meshing. Please suggest ways to improve quality.
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July 17, 2010, 09:32 |
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#4 |
Member
Join Date: Oct 2009
Location: Italy
Posts: 88
Rep Power: 16 |
hi
i use CFX workbench |
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July 20, 2010, 12:04 |
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#5 |
New Member
Karan Anand
Join Date: Feb 2010
Posts: 23
Rep Power: 16 |
I have not used the workbench for meshing, so i will be of little help. I use ICEM. In there, quality problems are usually solved by changing the surface mesh. Check where the quality of the mesh is bad (usually it is the surface), then select the bad elements and use the edit mesh features to split the elements (volume elements, starting from the surface mesh, i.e. select the surface mesh side and split the volume mesh element touching the surface). Then use smoothing options.
It is always better that you have a coarser mesh. The quality tends to be better than a really fine mesh. So start with coarse mesh, apply smoothing, get quality mesh. Then refine this mesh, apply smoothing. Use splitting option at every step if necessary. usually this helps. Use smoothing with higher number of iterations if you want. |
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December 11, 2010, 13:04 |
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#6 |
New Member
Join Date: Dec 2010
Posts: 8
Rep Power: 15 |
why dont you slice your pipe in dm and sweep it? Then utilize a tet/prism for the rest of your model?
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