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Good source of DAKOTA tutorials.
Look here.
http://www.dicat.unige.it/guerrero/

For older versions of DAKOTA adopting cases is little bit tricky pursuit, but it's really work.

LES.
Long. Expensive. Seems to be true.

Here is useful work concrete with libForces library rethinking and implementing Curle's analogy on basis of it.

I think it would be very good just for coding exercise.

Complex online post-processing:
How to implement simple acoustic analogy in OpenFOAM
(Sergei Strizhak, Matvey Kraposhin)

Polyhedral, Tetrahedral, and Hexahedral Mesh Comparison



http://www.symscape.com/polyhedral-t...esh-comparison

Result line fit really good.
And it's much more better than 2D calculations of the same airfoil

Cx, Cy

Residuals

2D results