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Today, 09:21 |
mesh quality metrics
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#1 |
New Member
Giovanni Bettega
Join Date: Sep 2014
Posts: 13
Rep Power: 12 |
Hello forum,
Computing mesh quality statistics for the dual control volumes. +--------------------------------------------------------------+ | Mesh Quality Metric| Minimum| Maximum| +--------------------------------------------------------------+ | Orthogonality Angle (deg.)| 2.72453| 53.1852| | CV Face Area Aspect Ratio| 1.94744| 950.364| | CV Sub-Volume Ratio| 1.22567| inf| +--------------------------------------------------------------+ What about this? (the tetrahedral mesh generated by Tetgen) Regards Giovanni Last edited by gbettega; Today at 15:29. |
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Today, 16:10 |
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#2 |
Senior Member
bigfoot
Join Date: Dec 2011
Location: Netherlands
Posts: 630
Rep Power: 18 |
Maybe there is a cell of volume zero, causing a Sub-Volume ratio of infinity.
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Today, 17:42 |
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#3 |
New Member
Giovanni Bettega
Join Date: Sep 2014
Posts: 13
Rep Power: 12 |
Thank you for your reply. I will check.
In case, is it "normal" that Su2 is able to start and diverges after some tens of steps (a steady state run)? Is this Su2 message (I mean "Inf") coming from the dual grid? This last question is motivated by the fact that Teigen is very robust (never found a zero volume tetrahedron), and quality constraints are used for generating the grid I'll check Grazie! Giovanni |
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Today, 18:37 |
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#4 | |
New Member
Giovanni Bettega
Join Date: Sep 2014
Posts: 13
Rep Power: 12 |
Quote:
This has also been checked within the application, with few additional lines scanning all the tetrahedra and compare each volume with std::numeric_limits<double>::epsilon: no zero volume elements are found. Su2 starts, issues "inf", performs more than 200 inner iterations (CFL = 1.0) and stops because of divergence. In attachment a short summary (pdf) Giovanni |
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Tags |
mesh, mesh quality criteria |
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