Golfball: diameter 45 mm, weight 40 gramms, gives a free-fall speed of 130 km/h (at cf=0,3).
At 130 km/h I get a force of 0,6 N, wich gives a drag-coefficient of 0,49.
Seems a little bit to high. Maybe the dimples are to rough. Or the mesh. Or both.
I ran a laminar steady-state simulation (Re=105000), because cfmesh puts the boundary-elements on a wrong face.
The elements are put at one side of the cube, not at the golfball. Cant figure out why.
Thats the real stuff for a rainy sunday...