[UdoUebel]

Hey together!

I would appreciate your help on my problem concerning a simulation of a hydraulic valve.
As you can see in the picture below Iam working with a subsystem of an oil cycle and want to take a closer look into the behaviour of a new valve.
To explain the subsystem some notes (already the fluid volume):

• Inlet (Mass Flow Inlet)
  • Mass Flow (4.4 kg/s) / Velocity (7 m/s) / Pressure (180 bar)
• Outlet #1 (Pressure Outlet)
  • Pressure (180 bar)
• Outlet #2 (Pressure Outlet)
  • Pressure - unknown

The rest of the system is considered as a wall. Outlet #1 & #2 were trimmed of the remaining CAD-data, so in reality they dont end there!
My problem is that the simulated pressure drop (~150 bar) is way to high as the measured pressure drop is about 20-30 bar.

To sum up I just want to take a look at pressures and velocities (not the movement of the valve) in one position.

Could you see any mistakes in my chosen conditions or have any hints to improve the Simulation? Thank you all in advance!

Here my Chosen conditions:

Physic Models:
Constant Density
Liquid (Hydraulic Oil)
Segregated Flow
Turbulent
3D
Steady (and tried unsteady too, no difference)

Mesh:
Surface Remesher
Polyhedral Mesher
Automatic Surface Repair
Prism Layer Mesher