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blockMesh - more control of grading

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Old   November 23, 2012, 08:47
Question blockMesh - more control of grading
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Dave Crossley
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Dear OpenFOAMers,

I have finished constructing an aerofoil in blockMesh and require a little advice.
You can see that I have created a C mesh around an aerofoil, the problem is that when I scale the outer leading edge of the mesh the inner leading edge also scales. I realise this is because I have created a hex mesh block within this area but I require the cells to only change distribution/scale in the outer section of the mesh NOT on the inner surface of the aerofoil. Notice the nasty, unwanted size in cells in 'Aerofoil_section'.

I have found more control in Salome but as I intend to use several angles of attack blockMesh was a very good meshing tool.

BlockMeshDict is also attached.

Thanks

David
Attached Images
File Type: jpg entire_C-Mesh.jpg (60.0 KB, 58 views)
File Type: jpg Aerofoil_section.jpg (71.6 KB, 47 views)

Last edited by crossley90; November 28, 2012 at 14:58.
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Old   November 23, 2012, 09:25
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Hey have you tried using edgeGradin instead of simpleGrading?

this gives you the opportunity to define a grading for each edge separately.

For an example blockMeshDict see here:

mesh airfoil NACA0012

post number 5 contains the example
For further advice I recommend you to read the user guide as well.

have a nice weekend

regards
Colin
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