# Re: Meshing in 2d analysis of incompressible flow over airfoil

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May 31, 2013, 00:48
Re: Meshing in 2d analysis of incompressible flow over airfoil
#1
Member

Yash Ganatra
Join Date: Mar 2013
Posts: 67
Rep Power: 6
I have followed the Cornell University tutorial.
https://confluence.cornell.edu/displ...Airfoil+-+Mesh

I am able to generate one half of the C-Mesh successfully but not the other half.(i.e. the one which contains the rectangular domain only)
As it's necessary to make the edges biased towards the center of airfoil I used a different biasing type than the one suggested in the tutorial.
I have attached the photo of the mesh generated.

I need some suggestions on the possible solutions or the errors that might have crept in.

Thanks,
Yash
Attached Images
 Mesh.JPG (56.4 KB, 27 views)

 May 31, 2013, 03:45 #2 Senior Member     Alex Join Date: Jun 2012 Location: Germany Posts: 1,503 Rep Power: 25 The biasing in the upper right corner is inconsistent. Check again if the orientation of the edges in your model is correct.

June 14, 2013, 05:57
Re: Meshing of 2d airfoil in ANSYS
#3
Member

Yash Ganatra
Join Date: Mar 2013
Posts: 67
Rep Power: 6
I found some problems in my geometry and rebuilt it. http://www.mne.psu.edu/cimbala/Learn...al_Airfoil.pdf
This is the tutorial I followed for geometry. While Meshing the C-domain, my aim was to keep the edge biased towards the center of the airfoil.

I feel that mesh in the circular domain is not "perfect". Could anyone give their views regarding this mesh?
How can it be improved?

What is the meaning of "The default defeaturing tolerance was larger than one computed based on size controls. The mesher has modified the global defeaturing tolerance accordingly."?

Yash
Attached Images
 Mesh Overview.JPG (83.7 KB, 15 views) Airfoil Mesh.JPG (76.0 KB, 13 views) Leading Edge mesh.jpg (77.3 KB, 11 views)

 June 19, 2013, 04:32 #4 Senior Member     Alex Join Date: Jun 2012 Location: Germany Posts: 1,503 Rep Power: 25 Basically this means that the Ansys mesher is not intended to do this kind of meshing. Dont worry about the notification. Switch of the advanced sizing functions instead.

 June 19, 2013, 07:34 #5 Member   Yash Ganatra Join Date: Mar 2013 Posts: 67 Rep Power: 6 Thank you. I will do that and try improving the mesh

 Tags airfoil mesh, airfoil2d, fluent, mesh

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