Theory of cell quality scalar

helpCFD · April 1, 2021, 06:27

Hi ! Does anyone know how work cell quality scalar in Star CCM+ ? I mean cell quality scalar is based on what ? Only the length or there is something more for Star CCM+ to qualify a cell as bad ?

Thank you !

fluid23 · April 5, 2021, 10:08

I believe that their algorithm is proprietary, otherwise the details would be listed in the help files. I think they updated this algorithm in the 2020 version, so the answer may even depend on your version (somewhat).

Their description of the algorithm says that it is based on a hybrid of the Gauss and least-squares methods for cell gradient calculations and considers the distribution of the centroids as well as the orientation of neighboring cells.

I imagine that none of that is very helpful. If you really need an answer to this, you may need to submit a help ticket and hope that they can give you enough details to make sense of it.

April 1, 2021, 06:27	Theory of cell quality scalar	#1
helpCFD New Member Join Date: Mar 2021 Posts: 1 Rep Power: 0	Hi ! Does anyone know how work cell quality scalar in Star CCM+ ? I mean cell quality scalar is based on what ? Only the length or there is something more for Star CCM+ to qualify a cell as bad ? Thank you !

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April 5, 2021, 10:08		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 18	I believe that their algorithm is proprietary, otherwise the details would be listed in the help files. I think they updated this algorithm in the 2020 version, so the answer may even depend on your version (somewhat). Their description of the algorithm says that it is based on a hybrid of the Gauss and least-squares methods for cell gradient calculations and considers the distribution of the centroids as well as the orientation of neighboring cells. I imagine that none of that is very helpful. If you really need an answer to this, you may need to submit a help ticket and hope that they can give you enough details to make sense of it.