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-   -   Airfoil meshing (http://www.cfd-online.com/Forums/ansys-meshing/67894-airfoil-meshing.html)

Alonso April 24, 2007 13:47

Airfoil meshing
 
Hi:

I am learning ICEM CFD and one of my first tasks is to generate a C-grid around an airfoil. I am trying to create a nice blocking scheme with an O-grid to capture the geometry with a nice boundary layer around it. However, so far all my attemtps have failed. I always get different kind of problems with the grid.

Could anyone help me and provide me an idea or step-by-step approach to create C-grids with ICEM CFD, please?

I have never done C-grids before. I have experience using gambit, where I usually do circular grids around airfoils. I have already completed all the ICEM tutorials, so I am familiar with the tools in the program.

Thanks


Santiago Orrego April 24, 2007 16:28

Re: Airfoil meshing
 
Where are you from? contact me. I talk spanish and I can help you out, with a previous airfoil project I worked. Cheers Santiago.

Dr. Flow Squad April 25, 2007 04:33

Re: Airfoil meshing
 
I found it also not that easy to do. But this is how I did the blocking of it in the end.

<img src=http://users.cybercity.dk/~ida3068/cfd/C-grid.png>

<img src=http://users.cybercity.dk/~ida3068/cfd/C-grid%20blocks.png>

Dr. Flow Squad

Santiago Orrego May 9, 2007 20:09

Re: Airfoil meshing
 
This was how we made it:

Blocks: http://i97.photobucket.com/albums/l2...ego/Dibujo.png



Mesh: http://i97.photobucket.com/albums/l2...go/Dibujo2.png


Dr. Flow Squad May 10, 2007 04:26

Re: Airfoil meshing
 
That looks OK. Can I see it zoomed in on the airfoil?

Santiago Orrego May 10, 2007 09:19

Re: Airfoil meshing
 
Ok.

Blocks: http://i97.photobucket.com/albums/l205/sorrego/Di2.png



Mesh: http://i97.photobucket.com/albums/l205/sorrego/di.png Cheers. Santiago.

PSYMN August 28, 2009 09:47

Nicely done. :D

Karatix September 28, 2009 08:43

Hello,

I also try to create a C-Mesh, with a similar strategy, but each time I export the mesh (using CFX4) there is a very tiny gap at the leading edge. When I associated the two vertices ahead of the airfoil to one point (5m away from the leading edge), the exporting failed.
When I overlapped the verticies manually using "move vertex" the gap does not disappear and neither for moving both vertices using the coordinate system.

Do you have any suggestion for me?

chriss September 30, 2009 10:06

hi santiago,

can u show me step by step, blocking mesh scheme?

see u later, regards

Salvatore October 10, 2009 08:59

Sorry Santiago....
Can you explain step by step how do you create the blocks for the mesh ???

Thx for all...

PSYMN April 16, 2010 23:57

I FINALLY made a movie to answer this frequently asked question
 
I FINALLY made a "how to" movie to answer this frequently asked question, well three parts actually.

They are on the ANSYS YouTube site...

http://www.youtube.com/ansysinc

I know it is late, but I hope it helps...

L.J.Jiang June 1, 2010 11:50

Thanks for your perfect job, Simon

Lijun


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