Grid Convergence Index - where to find required data?

ah123 · February 14, 2022, 07:28

Hello,

I am using ANSYS Mesh and FLUENT to model the flow around an aerofoil, and am struggling to find either the average cell edge length or average cell area (ideally the average cell area) to input into the equation giving a representative cell size, later resulting in the Grid Convergence Index.

I have read in the manual and forums and have not found a way to do this in either Mesh or FLUENT; I have only been able to find the characteristic length.

Any help would be appreciated.

Thanks in advance.

Indra · February 19, 2022, 07:44

In Fluent, under General>Check Mesh it'll give you some face area and volume stats for mesh. You can check mesh metrics in ANSYS meshing but I don't remember how to get mesh area stats.

alainislas · March 11, 2022, 05:29

I'd simply take L = (avg. cell volume)^1/3

I believe Fluent does not give you that much mesh statistics info ...
Perhaps take it it to Fluent Meshing, Otherwise, you can take it to ICEM which I'm 100% sure that gives you these statistics.

February 14, 2022, 07:28	Grid Convergence Index - where to find required data?	#1
ah123 New Member Alex Join Date: Feb 2022 Posts: 1 Rep Power: 0	Hello, I am using ANSYS Mesh and FLUENT to model the flow around an aerofoil, and am struggling to find either the average cell edge length or average cell area (ideally the average cell area) to input into the equation giving a representative cell size, later resulting in the Grid Convergence Index. I have read in the manual and forums and have not found a way to do this in either Mesh or FLUENT; I have only been able to find the characteristic length. Any help would be appreciated. Thanks in advance.

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February 19, 2022, 07:44		#2
Indra Member Void_CFD-user Join Date: Feb 2022 Posts: 67 Rep Power: 4	In Fluent, under General>Check Mesh it'll give you some face area and volume stats for mesh. You can check mesh metrics in ANSYS meshing but I don't remember how to get mesh area stats.

March 11, 2022, 05:29		#3
alainislas Senior Member Alain Islas Join Date: Nov 2019 Location: Mexico Posts: 142 Rep Power: 7	I'd simply take L = (avg. cell volume)^1/3 I believe Fluent does not give you that much mesh statistics info ... Perhaps take it it to Fluent Meshing, Otherwise, you can take it to ICEM which I'm 100% sure that gives you these statistics.