@Wilfried: thanks for the tip.
I enabled "STEP compound merge" in Preferences/Import-Export/step,
but I still have 1000 parts after importing.
@Wilfried: I exported all lofts to brep, now I have 1 part.
But still a 2D-shell.
@hds: a drag of 3,26 N at 0,5m^2 area gives a drag coefficient of 1,3.
Mmmh...could that be plausible for a VIIC-sub? Maybe, it is not
a "real" submarine, it is more like a diving ship. But the drag of 3,26 N
does not match to the pressure scale in your picture. When multiplying
the peak pressure with the water density, you get 0,6*1000=600 N/m^2,
thats to high. In an other pic above you calculated 0,027 normalized pressure,
which gives 0,027*1000=27 N/m^2 real pressure at the bow/tower. That seems ok.
Please check the pressure in the (upstream) free-field (the zone between inlet and boat).
At 0,1 m/s inlet speed and 1,0E-06 m^2/s kinematic
viscosity the pressure
should be around 5 N/m^2.
Providing the stl/case files would be nice. I can try a run directly in the
bluecfd-core terminal. But dont expect to much, I run a small laptop,
not a high-end university machine...