CFD Online Discussion Forums - Loop over faces of cell

Hey,

I have a surfaceScalarField phi2 which is kind of same like flux phi from U.

Now I would like to combine phi and phi2 in another field phiFinal.
To decide, which value of phi/phi2 needs to be added, I loop over all cells and check the value of my volScalarField A inside this cell.

How can I change the values?

At the moment I just know how to get the faces of my cell like this

Code:

forAll(A,celli)

{

    const labelList& faces = mesh.cells()[celli]; // returns "6(a b c d e f)"

    if(A[celli] < 0)

    {

        // Now I would like to add phi_face_value to phi3_face_value

    }

    else

    {

        // Now I would like to add phi2_face_value to phi3_face_value



    }

}

Another problem for me is the difference between internal and boundary faces... phi shows a list of internalField and the calculated boundary... How can I achieve this, if I assign phi3 like I want to.

Thanks in advance

Chris.