CFD Online Discussion Forums - Interpolate internal field onto patch / boundary

Hi guys,

i am new to OpenFOAM and now i am having trouble implementing a final step for a new boundary condition. I hope that someone can help me.

MY PROBLEM:

I would like to interpolate scalar-values ("interpolatedPatchValues") of a certain patch ("patchName") from an internal-scalar-Field ("internalField").

Code:

const volScalarField& internalField = db().lookupObject<volScalarField>

("name_of_internal_scalar_field");



const fvPatchField<scalar> interpolatedPatchValues = 

Unknown_INTERPOLATE_function( internalField, "patchName", ???);

I hope that somebody can help me or give me a hint.

Thanks a lot in advance,
Jonas