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Old   April 24, 2007, 13:47
Default Airfoil meshing
  #1
Alonso
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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

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Old   April 24, 2007, 16:28
Default Re: Airfoil meshing
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Santiago Orrego
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Where are you from? contact me. I talk spanish and I can help you out, with a previous airfoil project I worked. Cheers Santiago.
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Old   April 25, 2007, 04:33
Default Re: Airfoil meshing
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Dr. Flow Squad
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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
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Old   May 9, 2007, 20:09
Default Re: Airfoil meshing
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Santiago Orrego
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This was how we made it:

Blocks:



Mesh:

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Old   May 10, 2007, 04:26
Default Re: Airfoil meshing
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Dr. Flow Squad
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That looks OK. Can I see it zoomed in on the airfoil?
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Old   May 10, 2007, 09:19
Default Re: Airfoil meshing
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Santiago Orrego
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Ok.

Blocks:



Mesh: Cheers. Santiago.
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Old   August 28, 2009, 09:47
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Simon Pereira
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Nicely done.
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Old   September 28, 2009, 08:43
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Karatix
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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?
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Old   September 30, 2009, 10:06
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Christiano Santim
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hi santiago,

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

see u later, regards
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Old   October 10, 2009, 08:59
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Salvatore
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Sorry Santiago....
Can you explain step by step how do you create the blocks for the mesh ???

Thx for all...
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Old   April 16, 2010, 23:57
Default I FINALLY made a movie to answer this frequently asked question
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Simon Pereira
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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...
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Old   June 1, 2010, 11:50
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Jiang Lijun
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Thanks for your perfect job, Simon

Lijun
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