spatial distribution of force coefficients in paraview&openfoam
 

hi everyone!

i am now doing some simulations about flow around a 3D cylinder with OpenFOAM. The simulation goes well but i got a problem with post-processing.

basically i need to get the spatial distribution of the force coefficients on the surface along the span wise direction, as is shown in the picture below.
http://ars.els-cdn.com/content/image...00170X-gr4.jpg

i know that adding functions in controlDict could give me the force coefficients, but that seems to be the average value along the whole cylinder, which is not what i want.

is there anyone who knows how to do this in paraview?
any help is appreciated!