[fijinx]

First and foremost, I am new to OpenFOAM, so this may be a silly question or one that has been brought up before. However, I am attempting to run a 2D nozzle problem and have a question on how to get empty on the front and back with snappyHexMesh. As I understand it boundary conditions are applied to patches, so if I apply a BC to the surface of an STL file that is smaller than the bounding box, it would be a 3D BC on the entire surface? I tried making the bounding box thinner than the STL file in the z direction, but came up with an error when trying to run SonicFoam about it not being 1D or 2D because the empty faces weren't divisible by the cells (or something to that effect). If anyone could shed some light on this It would be appreciated!