For creating new mesh with snappyHexMesh it is recommended to create new OpenFOAM test case just with system and constant directory.
The input .STL files are located in constant/triSurface and can be directly viewed in paraview: # paraview
Four .STL files are presented, namely align-rot-draft.stl, hub-rot.stl, outflow-drafttube.stl, outflow-outlet.stl,
Interface between draft tube and rotor part (align-rot-draft.stl) is the same as for rotor region (see Section , page ).
The initial idea is to create following mesh boundaries: draft tube walls, outlet and interface. Their number and names may change during the creation process.