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Polyhedral Mesh Quality in Star-CCM+

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Old   March 5, 2012, 14:50
Default Polyhedral Mesh Quality in Star-CCM+
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Niaz Ali Ahmed
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Hello everyone, I have to simulate rotating blades using Moving Reference Frame. I had opted for Polyhedral Mesh because it gives conformal mesh.

I had generated Surface mesh where all faces have quality above 0.5 and majority within 0.9 to 1 (85 to 90%, as per final face quality breakup before surface meshing module ends).

I had used this mesh to generate a polyhedral mesh with Prism Layer. But the skewness near blade wall showed a range 30 to 89. The Cell Quality Remediation shows 9 negative vol cells.

I have wasted nearly 12 hours or more in generating the polyhedral whereas the same count of Trimmed Mesh can be obtained in much lesser time.

I think the skewness near wall is due to Prism Layers not the polyhedral mesh.

I request members to provide suggestion / Best Practices for improving the mesh quality.

Thanks in advance
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Old   March 5, 2012, 15:51
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Joern Beilke
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Quote:
Originally Posted by niazaliahmed View Post
I have wasted nearly 12 hours or more in generating the polyhedral whereas ...
If you think, that spending 12 hours is a waste of time you should probably look for another hobby. CFD might not be the right thing for you to do.

Since most of use don't have the gift of foresight it is impossible to help you with so little information.
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Old   March 6, 2012, 04:22
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siamak rahimi ardkapan
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Try to reduce the difference between minimum size and target size of the cells in the reference value icon.
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Old   March 8, 2012, 14:51
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Niaz Ali Ahmed
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Originally Posted by siara817 View Post
Try to reduce the difference between minimum size and target size of the cells in the reference value icon.

@JBeilke Sorry for the inconvenience I caused you


@ Siara817-- I have done that already the simulation results are matching with my prediction by 97%. Thank you very much...
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