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Interpolate face velocitys to points

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Old   December 16, 2014, 06:51
Default Interpolate face velocitys to points
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Hey all,
as in the headings, I want to interpolate the face centre velocitys of a boundary to the boundary points. I know that there is the following function:

Code:
faceToPointInterpolate();
But I get stuck on that. I also found that thread http://www.cfd-online.com/Forums/ope...polypatch.html but I did not get the point.

What I have is a vectorField with the size of boundary points and I want to interpolate the face centred velocitys to the points. How can I do this?


For those who wondering why I need it. Its easy because the "pointMotionU" need the velocitys on each point to move the mesh.
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Old   December 16, 2014, 09:19
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Done!

Code:
            const volVectorField& U_ = this->db().lookupObject<volVectorField>("U");

            //- PatchID 
            const label patchID = U_.mesh().boundaryMesh().findPatchID("top");

            //- set-up interpolator
            primitivePatchInterpolation patchInterpolator
            (
                U_.mesh().boundaryMesh()[patchID]
            );

            //- 
            vectorField UFaceValues_ = U_.boundaryField()[patchID];

            //- Perform interpolation 
            vectorField UPointValues = patchInterpolator.faceToPointInterpolate(UFaceValues);
I refer to that page: http://www.cfd-online.com/Forums/ope...tml#post447552
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