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-   -   Polyhedral Mesh Quality in Star-CCM+ (http://www.cfd-online.com/Forums/star-ccm/98196-polyhedral-mesh-quality-star-ccm.html)

niazaliahmed March 5, 2012 14:50

Polyhedral Mesh Quality in Star-CCM+
 
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

JBeilke March 5, 2012 15:51

Quote:

Originally Posted by niazaliahmed (Post 347769)
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.

siara817 March 6, 2012 04:22

Try to reduce the difference between minimum size and target size of the cells in the reference value icon.

niazaliahmed March 8, 2012 14:51

Quote:

Originally Posted by siara817 (Post 347850)
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:cool:


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


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