[ICEM] Different Orthogonal Quality in ICEM and FLUENT

Thibalt · June 12, 2014, 10:25

Can someone help me understanding the following. I meshed a wing in ICEM CFD with great attention to the orthogonal quality. ICEM said that the quality > 0.3, which is good. When the mesh was loaded in FLUENT it says: quality > 3.44e-04 after which the simulation diverges?

Why is there a difference between the two?

Quality in Fluent

Quality in ICEM CFD

RodriguezFatz · February 24, 2015, 04:55

Yes. Take a look here:
http://www.cfd-online.com/Forums/ans...problem-2.html
It's calculated differently in your version. This is fixed in version 15. It's not fixed, that ICEM hexa grids become arbitrarily bad (orthogonal quality) if you refine the wall cells more and more.

Thibalt · February 24, 2015, 05:06

Thanks for the reply!

mahantesh · February 27, 2015, 06:19

Hi Thibalt can you please forward that vedio of structured mesh created on that wing....
i hope u will reply as soon as possible...
mahantesh..

Thibalt · February 27, 2015, 06:45

What exactly do you mean with vedio? If you meant video, I did not really use a video doing particulary that wing. It has been a while, but I found some videos that can help you doing such cases.

https://www.youtube.com/watch?v=mgjRT4WY_iA

https://www.youtube.com/watch?v=CDQcY3UARck

https://www.youtube.com/watch?v=9Bc0NBk-urM

If you search on youtube for "ICEM airfoil" or "ICEM sharp trailing edge" for example you can find quite a bit.

Good luck!

June 12, 2014, 10:25	Different Orthogonal Quality in ICEM and FLUENT	#1
Thibalt New Member Thibault Join Date: May 2014 Posts: 16 Rep Power: 12	Can someone help me understanding the following. I meshed a wing in ICEM CFD with great attention to the orthogonal quality. ICEM said that the quality > 0.3, which is good. When the mesh was loaded in FLUENT it says: quality > 3.44e-04 after which the simulation diverges? Why is there a difference between the two? Quality in Fluent Quality in ICEM CFD

February 24, 2015, 04:55		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 27	Yes. Take a look here: http://www.cfd-online.com/Forums/ans...problem-2.html It's calculated differently in your version. This is fixed in version 15. It's not fixed, that ICEM hexa grids become arbitrarily bad (orthogonal quality) if you refine the wall cells more and more. __________________ The skeleton ran out of shampoo in the shower.

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February 24, 2015, 05:06		#3
Thibalt New Member Thibault Join Date: May 2014 Posts: 16 Rep Power: 12	Thanks for the reply!

February 27, 2015, 06:19		#4
mahantesh New Member mahantesh Join Date: Oct 2014 Posts: 4 Rep Power: 12	Hi Thibalt can you please forward that vedio of structured mesh created on that wing.... i hope u will reply as soon as possible... mahantesh..

February 27, 2015, 06:45		#5
Thibalt New Member Thibault Join Date: May 2014 Posts: 16 Rep Power: 12	What exactly do you mean with vedio? If you meant video, I did not really use a video doing particulary that wing. It has been a while, but I found some videos that can help you doing such cases. https://www.youtube.com/watch?v=mgjRT4WY_iA https://www.youtube.com/watch?v=CDQcY3UARck https://www.youtube.com/watch?v=9Bc0NBk-urM If you search on youtube for "ICEM airfoil" or "ICEM sharp trailing edge" for example you can find quite a bit. Good luck!