atmFlatTerrain precursor atmAmbientTurbSource setup
precursor setup of
atmFlatTerrain is inconsistent with the successor and other atmospheric cases. The
atmAmbientTurbSource produces turbulent mixing length of 72m which is way too high even compared to the setup
Lmax = 41m. This should not exceed few meters 1~2m. I think,
kAmb should drop at least one order of magnitude to match the successor. Unless there is a specific reason for such choice which I missed.