Info<< "Reading field p\n" << endl; volScalarField p ( IOobject ( "p", runTime.timeName(), mesh, IOobject::MUST_READ, IOobject::NO_WRITE ), mesh ); p = dimensionedScalar("zero", p.dimensions(), 0.0); Info<< "Reading field U\n" << endl; volVectorField U ( IOobject ( "U", runTime.timeName(), mesh, IOobject::MUST_READ, IOobject::AUTO_WRITE ), mesh ); U = dimensionedVector("0", U.dimensions(), vector::zero); surfaceScalarField phi ( IOobject ( "phi", runTime.timeName(), mesh, IOobject::NO_READ, IOobject::AUTO_WRITE ), fvc::interpolate(U) & mesh.Sf() ); label pRefCell = 0; scalar pRefValue = 0.0; setRefCell(p, mesh.solutionDict().subDict("SIMPLE"), pRefCell, pRefValue);