[ss32]

I've run into a weird problem that only shows up with meshes imported from Pointwise. I can run the same case for a NACA0012 and get different results depending on if the mesh was generated by OpenFoam or if it was created in Pointwise and imported. I'm using this as a test bed - https://github.com/petebachant/NACAFoil-OpenFOAM

I run his script to generate the airfoil at 0 angle of attack, and then modify 0/U to a 5m/s free stream at an 8 degree angle of attack. I do the same thing for a NACA0012 generated with a Pointwise script, generate the C grid (albeit higher resolution), define the same boundary conditions, and import it into OpenFoam. For the same time steps I'm getting two orders of magnitude difference in values of Cl and for the life of me cannot figure out why.

Full case directories for both:
Python/Github NACA case - https://dl.dropboxusercontent.com/u/...Python0012.zip
Pointwise case - https://dl.dropboxusercontent.com/u/...ntwise0012.zip

[Kina]

Your 0/U in the Pointwise directory says:

    inlet
    {
        type            fixedValue;
        value           uniform (1 0 0);
    }

meaning you initialize your internalField with 5m/s but the the freestream flow changes to (1 0 0). I recommend changing the code to:

    inlet
    {
        type            fixedValue;
        value           $internalField;
    }

to avoid such errors.

Cheers
Alex

[ss32]

Oh wow I feel dumb, thank you! Cl values are looking good for the pontwise mesh now!