[Talder]

Hi,

three questions actually:
I'm trying to mesh an internal flow Venturi nozzle domain with snappyHexMesh. My STL file works fine (3 new patches created : inlet, outlet and walls).

1) Should I remove the BC's on the outside patches or leave them ? They have no purpose if you're modelling an internal flow.
(so only add boundary conditions for the new internal domain patches?)

2) The first results after castellated and snapped mesh look a bit strange to me. I was expecting a filled up 3D volume packed with many hex-cells, but when I look through the nozzle I see only very few cells, only around the walls, inlet and outlet patches. Did I miss something in order to obtain a fully meshed 3D volume ? (see image attached)

3) part of the surrounding background walls also got refined meshes, which I did not expect. Could this be related to a leaking mesh for my venturi nozzle, although I used the same circle for inlet/outlet patches as for the wall edges.

Best Regards,
Tom.