Hi,

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

turbulence calculations?

Comments welcome.

Thomas