did some cfd test-runs with my little house.
goal: compute the resulting drag-force at 115 km/h wind-speed
according to german DIN-manuals. When using cfmesh/mesh-refinement and
k-omega turbulence model, I get a resulting drag force of approx 37,4 kN.
When doing the same with snappyhexmesh/mesh-refinement and NO turbulence model,
I get nearly the same force. Checking the results "by hand" gives a good accordance.
In reality there is turbulence (turbulence-intensity behind house approx 20%), but
in the models there is practically no difference. So why should I use time-consuming