createFields.H

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    Info<< "Reading physicalProperties\n" << endl;
 
    IOdictionary physicalProperties
    (
        IOobject
        (
            "physicalProperties",
            runTime.constant(),
            mesh,
            IOobject::MUST_READ_IF_MODIFIED,
            IOobject::NO_WRITE
        )
    );
 
    dimensionedScalar epsilon0
    (
        physicalProperties.lookup("epsilon0")
    );
 
    dimensionedScalar k
    (
        physicalProperties.lookup("k")
    );
 
 
    Info<< "Reading field phi\n" << endl;
    volScalarField phi
    (
        IOobject
        (
            "phi",
            runTime.timeName(),
            mesh,
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        mesh
    );
 
 
    Info<< "Reading field rho\n" << endl;
    volScalarField rho
    (
        IOobject
        (
            "rho",
            runTime.timeName(),
            mesh,
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        mesh
    );
 
 
    Info<< "Calculating field rhoFlux\n" << endl;
    surfaceScalarField rhoFlux
    (
        IOobject
        (
            "rhoFlux",
            runTime.timeName(),
            mesh,
            IOobject::NO_READ,
            IOobject::NO_WRITE
        ),
        -k*mesh.magSf()*fvc::snGrad(phi)
    );