[Commercial meshers] checkMesh : Mesh non orthogonality

Gearb0x · April 20, 2010, 12:57

Dear Foamer,

Can someone explain me what is mesh non orthogonality ? Maybe with a picture?

Because I have this information in checkmesh and this is giving me troubles.

Thanks for your help.

jms · February 2, 2011, 11:26

Hello, did you get any answer to your question?

Gearb0x · February 2, 2011, 11:51

Dear,

I have now finished my thesis and have therefore not touched OpenFoam in a while.

From what I remember, non orthogonality is not simple mathematically speaking. It's in fact the angle difference between two adjacent cells.

In my case, I looked at this problem with my advisor because I thought I had very high non orthogonality figures. After looking at the mesh, nothing was wrong so we wondered if there was not a slight problem in the way OpenFoam is computing this value ...

Now, take my word with caution since I don't remember exactly what my problem was neither the answer I received from my advisor.

Sorry not being able to help you more.

best

April 20, 2010, 12:57	checkMesh : Mesh non orthogonality	#1
Gearb0x Senior Member Join Date: Nov 2009 Posts: 111 Rep Power: 17	Dear Foamer, Can someone explain me what is mesh non orthogonality ? Maybe with a picture? Because I have this information in checkmesh and this is giving me troubles. Thanks for your help.

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February 2, 2011, 11:26		#2
jms Member José Join Date: Jan 2011 Posts: 73 Rep Power: 15	Hello, did you get any answer to your question?

February 2, 2011, 11:51		#3
Gearb0x Senior Member Join Date: Nov 2009 Posts: 111 Rep Power: 17	Dear, I have now finished my thesis and have therefore not touched OpenFoam in a while. From what I remember, non orthogonality is not simple mathematically speaking. It's in fact the angle difference between two adjacent cells. In my case, I looked at this problem with my advisor because I thought I had very high non orthogonality figures. After looking at the mesh, nothing was wrong so we wondered if there was not a slight problem in the way OpenFoam is computing this value ... Now, take my word with caution since I don't remember exactly what my problem was neither the answer I received from my advisor. Sorry not being able to help you more. best