[snappyHexMesh] SnappyHexMesh meshes inside and outside of an STL geometry

villier

Hello!

I have created a simple box, meshed with blockMesh, and placed another (quite simple) closed geometry from an STL file in this box using a modified snappyHexMeshDict from the motorbike tutorial.
I set the locationInMesh outside the STL geometry, and inside the surrounding box. snappyHexMesh works fine, but if I display the resulting mesh in paraFoam, I see that although the cells have snapped to the STL geometry, also the interior of this geometry is meshed. I assume it is no supposed to?

Did I forget some step to have only the outside of the STL geometry meshed as displayed in the "5.4 Mesh generation with the snappyHexMesh utility" chapter of the users guide ("cell removal" step)?

(If I set the locationInMesh inside the STL geometry, the resulting mesh is only the STL interior.)

Looking forward to your advice
Pierre