[thecfduser]

Hi my friend
1- as i explained before, u choose the flowrates of each phase: Qg and Ql.
Qg=alpha*V*S
Ql=(1-alha)*V*S
So u have 2 eqs. and 2 unkowns that are V and alpha, that u must give to Fluent.

2-U must monitor data. When ure data monitors become to show steady (oscillatory around a certain mean) behavior, u must average ure variables in time (in the iterate pannel). After a certain time, u look to ure unsteady statistics: if ure mean velocity profile does not change with x (the pipe axis) that means that ure solution is fully developped and that ure pipe lenth was sufficient...
I hope that i coule be clear with my bad english ...(if u understand french, it will be very easier to me to explain...)If i was not clear, write to me again
Regards