openfoam/tutorials/combustion/engineFoam/freePiston/system/fvSolution

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  dev                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "system";
    object      fvSolution;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

solvers
{
    "rho.*"
    {
        solver          diagonal;
    }

    p
    {
        solver          PCG;
        preconditioner  DIC;
        tolerance       1e-6;
        relTol          0.1;
    }

    pFinal
    {
        $p;
        relTol          0;
    }

    "(U|e|k|epsilon)"
    {
        solver          PBiCGStab;
        preconditioner  DILU;
        tolerance       1e-5;
        relTol          0.1;
    }

    "(U|e|k|epsilon)Final"
    {
        $U;
        relTol          0;
    }
}

PIMPLE
{
    nCorrectors     2;
    nNonOrthogonalCorrectors 1;
    momentumPredictor yes;
}


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