openfoam/applications/solvers/heatTransfer/chtMultiRegionFoam/fluid/readFluidMultiRegionPISOControls.H

    const dictionary& piso = fluidRegions[i].solutionDict().subDict("PISO");

    const int nOuterCorr =
        piso.lookupOrDefault<int>("nOuterCorrectors", 1);

    const int nCorr =
        piso.lookupOrDefault<int>("nCorrectors", 1);

    const int nNonOrthCorr =
        piso.lookupOrDefault<int>("nNonOrthogonalCorrectors", 0);

    const bool momentumPredictor =
        piso.lookupOrDefault("momentumPredictor", true);

    const bool transonic =
        piso.lookupOrDefault("transonic", false);