Hello Heiko,
thanks for the openfoam case. I had a first look, some hints:
In „constant/transportProperties“ the kinematic viscosity is set
to 1.0e-05, should be 1.0e-06 for water.
In „system/fvschemes“ a steady-state analysis is defined.
Then you should change the time entries in „system/controlDict“.
When running a steady-state calculation, the time is not a physical time
(as it is when doing a transient calculation), the parameter time works as an
incrementation counter for the iterations. Your entries should be
startTime=0
endTime=3000 (for ensuring convergence)
deltaT=1
writeInterval=20
As a first start I would not use a turbulence model. When calculating
the turbulence parameters „by hand“ or using this tool
https://www.cfd-online.com/Tools/turbulence.php
the turbulent kinetic energy/dissipation is nearly zero.
I will try to get the case running.
Thomas