blockMesh - more control of grading
 

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

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:

http://www.cfd-online.com/Forums/ope...-naca0012.html

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

How to solve edgeGrading problem in BlockMeshDIct
 

Hello,

I am trying to do simpleGrading but get error.

Creating block offsets
Creating merge list (topological search)..

--> FOAM FATAL ERROR: (openfoam-2106 patch=211215)
Point merge failure between face 3 of block 4 and face 1 of block 5
Points: (78.3 87.4921 0) (75.8404 73.4568 0)
This may be due to inconsistent grading.

From void Foam::blockMesh::calcTopologicalMerge()
in file blockMesh/blockMeshMergeTopological.C at line 453.

FOAM exiting

please help me I am trying last two days to solve it but not getting solved