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-   -   Aerofoil CFD enquiry (http://www.cfd-online.com/Forums/star-ccm/88013-aerofoil-cfd-enquiry.html)

cfdlboro May 5, 2011 10:36

Aerofoil CFD enquiry
 
1 Attachment(s)
Hello everyone,

I am running simulations on Star CMM+ on a few different aerofoils. I have attached a file showing the poly mesh I have, can anyone tell me what is going on with the mesh immediately around the aerofoil and if so why?

Thanks in advance,

cfdlboro

abdul099 May 7, 2011 04:28

That's a miracle! I've never seen somebody being able to create a mesh like this! ;)
Okay, let's stay serious. What about your other airfoils? Does it alway look like this? Is this view a cutting plane or the view on a boundary? What about prism layers, do you have some?

I'm not sure due to the missing information, but when your view shows a wall with prism layers, the mesher will have some problems on the concave edge between this wall and the airfoil boundary. Try switching the wall to a symmetry plane and check the mesh again. It might give you better results anyway, as most airfoils doesn't have a perpendicular wall directly attached (except a plane fuselage).

rwryne May 9, 2011 11:14

Can you give a picture of the mesh a bit closer to one of the "tumors"?

Is this a cutplane or a boundary you are showing? I have found little graphical hiccups like those spots on volume mesh cutplanes, but they are usually not that...consistent around the boundaries.


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