/usr/include/freefoam/incompressibleLESModels/ is in libfreefoam-dev 0.1.0+dfsg-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/freefoam/incompressibleLESModels/DeardorffDiffStress.H
/usr/include/freefoam/incompressibleLESModels/GenEddyVisc.H
/usr/include/freefoam/incompressibleLESModels/GenSGSStress.H
/usr/include/freefoam/incompressibleLESModels/IDDESDelta.H
/usr/include/freefoam/incompressibleLESModels/LESModel.H
/usr/include/freefoam/incompressibleLESModels/LRRDiffStress.H
/usr/include/freefoam/incompressibleLESModels/Smagorinsky.H
/usr/include/freefoam/incompressibleLESModels/Smagorinsky2.C
/usr/include/freefoam/incompressibleLESModels/Smagorinsky2.H
/usr/include/freefoam/incompressibleLESModels/SpalartAllmaras.H
/usr/include/freefoam/incompressibleLESModels/SpalartAllmarasDDES.H
/usr/include/freefoam/incompressibleLESModels/SpalartAllmarasIDDES.H
/usr/include/freefoam/incompressibleLESModels/dynOneEqEddy.H
/usr/include/freefoam/incompressibleLESModels/forceLink.C
/usr/include/freefoam/incompressibleLESModels/homogeneousDynSmagorinsky.H
/usr/include/freefoam/incompressibleLESModels/kOmegaSSTSAS.H
/usr/include/freefoam/incompressibleLESModels/laminar.H
/usr/include/freefoam/incompressibleLESModels/locDynOneEqEddy.H
/usr/include/freefoam/incompressibleLESModels/mixedSmagorinsky.H
/usr/include/freefoam/incompressibleLESModels/nuSgsWallFunctionFvPatchScalarField.H
/usr/include/freefoam/incompressibleLESModels/oneEqEddy.H
/usr/include/freefoam/incompressibleLESModels/scaleSimilarity.H
/usr/include/freefoam/incompressibleLESModels/spectEddyVisc.H
/usr/include/freefoam/incompressibleLESModels/vanDriestDelta.H