OpenFOAM-12/applications/solvers/heatTransfer/chtMultiRegionFoam/solid/readSolidMultiRegionPIMPLEControls.H

const dictionary& pimple = mesh.solutionDict().subDict("PIMPLE");

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