[khoder Alshaar]

Dear friends,

I am learning OpenFOAM Programming. I am planning to edit rhocentralFoam. However, when I started reading the source code, The first thing that stopped me was the following:

        surfaceScalarField rho_pos(interpolate(rho, pos));
        surfaceScalarField rho_neg(interpolate(rho, neg));

I understand the purpose of the two lines is to interpolate (reconstruct) the fields from cell centers to the left and right sides of each face.

My question is where/how to find the implementation of the

interpolate(rho, pos)

function. Especially the one that takes two arguments, rho, pos.

Thank you.