foam-extend4.1-coherent-io/applications/solvers/combustion/dieselEngineFoam/rhoEqn.H

/*---------------------------------------------------------------------------*\
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Global
    rhoEqn

Description
    Solve the continuity for density.

\*---------------------------------------------------------------------------*/

volScalarField Sevap
(
    IOobject
    (
        "Sevap",
        runTime.timeName(),
        mesh,
        IOobject::NO_READ,
        IOobject::NO_WRITE
    ),
    mesh,
    dimensionedScalar("zero", dimensionSet(1, -3, -1, 0, 0), 0.0)
);

for (label i = 0; i < Y.size(); i++)
{
    if (dieselSpray.isLiquidFuel()[i])
    {
        Sevap += dieselSpray.evaporationSource(i);
    }
}

{
    solve
    (
        fvm::ddt(rho)
      + fvc::div(phi)
      ==
        Sevap
    );
}

// ************************************************************************* //