[imandralis]

Dear all,

I am trying to calculate the skin friction coefficient on the surface of an airfoil. The output of the SU2 solver gives me the skin friction coefficient in the x-direction, but this needs to be projected onto the tangent of the airfoil surface.

It seems that Su2 doesn't output surface normals that I would normally use for this calculation. How can this be done with the outputs given by SU2, or the functionality in Paraview (I tried generating surface normals but this only works well with polydata).

Thanks in advance.