Orthogonal quality

Andrea159357 · February 13, 2019, 04:15

Hello, can some help me understanding why Orthogonal quality in FLUENT is different from Orthogonal quality calculated in ANSYS MESHING?
Ansys MESHING min OQ is 0.2 while loading the mesh in FLUENT is 3e-3???
How this is possibile?

Jiricbeng · February 13, 2019, 08:05

Recently I dealt with the same issue. I asked this question even with people from ansys and I did not get a satisfactory answer. Basically the quality is likely assessed by different criteria (equations) in individual programs. It also depends whether it is a surface element or volumetric element, type of element (tetra, hexa, poly..) etc.

I also found out that especially in Fluent the quality depends on number of cores, so parallelization is also an influential factor.

The conclusion is humble - until you import the mesh into fluent you have no guarantee the mesh satisfies your criteria.

Andrea159357 · February 13, 2019, 08:50

Thanks a lot for your prompt reply. So, i need to load the mesh to check if is correct or i need to remesh.

BlnPhoenix · February 13, 2019, 09:05

Quote:

Originally Posted by Andrea159357

Thanks a lot for your prompt reply. So, i need to load the mesh to check if is correct or i need to remesh.

Yes, it is like that unfortunatly. Pretty crappy imho...

Andrea159357 · February 17, 2019, 03:07

https://www.sharcnet.ca/Software/Ans...et_sizing.html

Orthogonal quality in the Meshing application is equivalent to orthoskew in ANSYS Fluent Meshing, except that the scale is reversed:

Orthoskew = 1 – Orthogonal Quality

February 13, 2019, 04:15	Orthogonal quality	#1
Andrea159357 Member Andrea Join Date: Mar 2018 Posts: 62 Rep Power: 8	Hello, can some help me understanding why Orthogonal quality in FLUENT is different from Orthogonal quality calculated in ANSYS MESHING? Ansys MESHING min OQ is 0.2 while loading the mesh in FLUENT is 3e-3??? How this is possibile?

February 13, 2019, 08:05		#2
Jiricbeng Senior Member Jiri Join Date: Mar 2014 Posts: 221 Rep Power: 13	Recently I dealt with the same issue. I asked this question even with people from ansys and I did not get a satisfactory answer. Basically the quality is likely assessed by different criteria (equations) in individual programs. It also depends whether it is a surface element or volumetric element, type of element (tetra, hexa, poly..) etc. I also found out that especially in Fluent the quality depends on number of cores, so parallelization is also an influential factor. The conclusion is humble - until you import the mesh into fluent you have no guarantee the mesh satisfies your criteria. Andrea159357 likes this.

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February 13, 2019, 08:50		#3
Andrea159357 Member Andrea Join Date: Mar 2018 Posts: 62 Rep Power: 8	Thanks a lot for your prompt reply. So, i need to load the mesh to check if is correct or i need to remesh.

February 17, 2019, 03:07		#5
Andrea159357 Member Andrea Join Date: Mar 2018 Posts: 62 Rep Power: 8	https://www.sharcnet.ca/Software/Ans...et_sizing.html Orthogonal quality in the Meshing application is equivalent to orthoskew in ANSYS Fluent Meshing, except that the scale is reversed: Orthoskew = 1 – Orthogonal Quality