I read ANSYS guidelines and I'm a bit confused. I would like to have water droplets flowing in saturated steam. The geometry is simple; vertical pipe and upward flow. I tried to choose steam5l and steam5v in Fluids list, but never get it to solve. When I chose only steam5vl, it's solved. Is the latter multiphase flow?

In the former situation, how can I get it solved? There are some error messages:

1st error message: While evaluating Steam5l.Local Speed of Sound, Static Pressure went outside of its upper limit. Its maximum value was 7.1391E+07. The bounds error was handled by clipping. If this situation persists, consider increasing the table range.

I tried to check "extrapolation" boxed for both temperature and pressure, but it didn't help; the error message is still there.

2nd error message: A wall has been placed at portion(s) of an OUTLET boundary condition (at 21.4% of the faces, 16.0% of the area) to prevent fluid from flowing into the domain. The boundary condition name is: Out. The fluid name is: Steam5v. If this situation persists, consider switching to an Opening type boundary condition instead

I tried to change "outlet" to "opening", but got this error message:

ERROR #001100279 has occurred in subroutine ErrAction. Message: The solver does not support combining Opening Pressure with Static Temperature or vice versa on openings for real gases

Thanks,

Yes, it is multiphase flow. Ignore the 2nd message (it's not an error) and use the outlet bc.