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Meshing with STARCCM+

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Old   January 10, 2020, 13:10
Red face Meshing with STARCCM+
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I'm trying to mesh a rectangular domain (3D) with STAR CCM+. It represents a volume of air with an inlet, a ground, a sky (and a building inside).

I would like to create a boundary layer over the ground to catch velocity gradients near the ground ( I put a field function for the inlet profile), however my boundary layer seems to apply on all edges while i only want the ground to be done.

How could I proceed ?

( and what type of region should I assign to the sky and sides of the domain which are juste a simple exit for the air ? )
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Old   January 10, 2020, 18:31
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Either with a Surface Control (in Parts Mesher) with Prism Layer set to disabled.
Or - what looks like real source of problem: by default meshers build prism layers at walls and do not do that at openings (inlets, outlets) and symmetry; so - assign boundary condition types first, then - mesh.
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layer addition, mesh 3d, star ccm+

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