# [ICEM] Wing Geometry Problem

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March 6, 2012, 06:19
Wing Geometry Problem
#1
Senior Member

Join Date: Mar 2011
Location: Germany
Posts: 422
Rep Power: 12
I am trying to mesh a simple rectangular wing in the ICEM CFD. I have made the geometry in Solid Works and imported the step and iges files in the ICEM CFD for meshing but the surface on the Trailing Edge of the wing is not exactly following the rounded contour of the curves, so i am getting the bad tetra and prism mesh in this region. Pictures are attached for the reference. Please check the attachments for the figures. Kindly help me in sloving this issure. I am really stuck up in this.
Attached Images
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 March 6, 2012, 13:03 #2 Senior Member   Ali Join Date: Jan 2012 Location: Pakistan Posts: 130 Rep Power: 8 send me ur geometry . I'll try. __________________ Best Regards Ali

 March 6, 2012, 18:27 #3 Senior Member   Stuart Buckingham Join Date: May 2010 Location: United Kingdom Posts: 267 Rep Power: 17 Hi cfd seeker, As far as I see it, you have a few possible solutions. Tetrahedral (and any FE cell for that matter) all have straight edges. In order to accurately capture the curvature of your wing profile, you will have to refine the area. By creating a density box, you can increase the local refinement. Also by splitting surfaces where curvature is greater than ~30 degrees, you can create more curves on the surface for nodes to "stick" to (using patch conforming method). If this is an airfoil TE, however, do you really need to capture that curvature? A non-sharp TE is going to destroy alot of your airfoils efficiency! By not satisfying the Kutta Condition, you are allowing circulation at the TE and therefore allowing the rear stagnation point to migrate away from the geometrical TE (== loss in lift)

 March 7, 2012, 01:25 #4 Senior Member   Ali Join Date: Jan 2012 Location: Pakistan Posts: 130 Rep Power: 8 try curve meshing set-up. assign appropriate nodes and bunching law. __________________ Best Regards Ali

 March 7, 2012, 02:57 #6 Senior Member   Join Date: Mar 2011 Location: Germany Posts: 422 Rep Power: 12 Does any one of know how to generate the structured quad/hexa mesh on this geometry?

 March 7, 2012, 04:24 #7 Senior Member   Christoph Join Date: May 2011 Location: Germany Posts: 182 Rep Power: 10 do you also have hexa licence? if so, it's very easy to generate a good quality mesh in case of this easy geometry. do you have any experience with icem hexa yet?

 March 9, 2012, 01:30 #8 Senior Member   Join Date: Mar 2011 Location: Germany Posts: 422 Rep Power: 12 Energy mu university has the license for that and no i don't have have any experience for the quad/hexa mesh yet....can you please help me for this???

 March 9, 2012, 04:14 #9 Senior Member   Christoph Join Date: May 2011 Location: Germany Posts: 182 Rep Power: 10 if you provide the .tin file, i'll take a look on it

 March 9, 2012, 11:41 #10 Senior Member   Join Date: Mar 2011 Location: Germany Posts: 422 Rep Power: 12 Yes Energy kindly tell me your email id, i will mail you the tin file of my wing or tell me your id through private message. thanks Regards

 March 9, 2012, 12:04 share and send link #11 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,301 Blog Entries: 6 Rep Power: 43 share the file on any file sharing site (I use www.4shared.com) and send link through pm or on forum. Forum sharing is better option as others may be able to help you out.

 March 9, 2012, 12:40 #12 Senior Member   Join Date: Mar 2011 Location: Germany Posts: 422 Rep Power: 12 Far I have told the problem in the other topic. My geometry is at my workplace but its a simple rectangular wing made of Naca 0015 airfoil, 1,7 feet chord and 5.59 feet semi-span, I only want to analyze the semi-span without fuselage...

 March 10, 2012, 12:10 #13 Senior Member   Join Date: Mar 2011 Location: Germany Posts: 422 Rep Power: 12 Please reply here Far, Simon, Stuart....

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