# [ICEM] Body Conformal Mesh

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 July 12, 2013, 18:31 Body Conformal Mesh #1 Senior Member   Ehsan Asgari Join Date: Apr 2010 Posts: 301 Rep Power: 9 Dear mates, I have tried to generate a mesh around a wing in ICEM. It seems that grid generated around the wing root is body conformal (an ellipse), while I couldn't create such a grid earlier!! I have attached a picture and as it's obvious, grid boundaries have exceeded the block boundary and have formed an ellipse. The question lies here: How is it possible to have control over grid shape? Fig.jpg Thanks

 July 12, 2013, 19:06 #2 Member   Cesar Join Date: Nov 2012 Location: Guanajuato, México Posts: 78 Rep Power: 7 Is the wing of constant cord length and angle of attack? You can control the grid shape by moving vertices and edges. You can also have control by associating edges to corresponding curves. If I'm not wrong, I can see from your picture that you are using the o-grid topology. Regards, César

July 13, 2013, 06:17
#3
Senior Member

Ehsan Asgari
Join Date: Apr 2010
Posts: 301
Rep Power: 9
Quote:
 Originally Posted by cesarcg Is the wing of constant cord length and angle of attack? You can control the grid shape by moving vertices and edges. You can also have control by associating edges to corresponding curves. If I'm not wrong, I can see from your picture that you are using the o-grid topology. Regards, César
Dear Cesar,
The wing has a taper ratio but there is no twist across the wing.
I see that it is possible to move vertices to define the shape of block (I have done it already).
As you implied, I am using on O-grid mesh type.
I intended to say that why grid cells are not confined in the rectangular block (colored in black) at the root and are forming an ellipse instead.
Regards.

 July 13, 2013, 12:42 #4 Member   Cesar Join Date: Nov 2012 Location: Guanajuato, México Posts: 78 Rep Power: 7 Dear Syavash, The grid cells are not confined in that rectangular block because they are following the shape of the airfoil at the root. The same happens along the wingspan. If the grid was not following that shape, I guess that the cells near the edges of the rectangular block would probably be highly distorted, resulting in a low quality of mesh in this region. This grid lines forming an ellipse should become straighter as you move farther from the wing. I hope I made myself enough clear. Why do you want the cells within this block to match the shape of the black rectangle? Is there any special reason? Regards.

 July 13, 2013, 13:04 #5 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,299 Blog Entries: 6 Rep Power: 43 following thread may be useful to you. Structured Hexa Mesh on Wing also search for video tutorial on youtube with key words "ICEM Hexa meshing tutorial - Wing with sharp trailing edge " blgypeng likes this.

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