[Spiros]

Hi. I have a 2d tube. In this tube with diameter D0 i have as inlet a constant velocity U. I call this tube Mother tube.
Then this tube is separated in two smaller tubes (daughter tubes) of different sizes (say D1=D0/2 and D2=D0).
Each output is= "Type:Pressure-outlet" with zero Gauge Pressure and the Backflow direction is set to default "Normal to Boundary".

How can i have a constant flow ratio 70:30 in the outlets of the daughter tubes, of D2(70) and D1(30)??

I try to do it like that in the first daughter tube:
I clicked the "Target Mass Flow Rate" and then in the "Target Mass Flow" box i input the number: 0.3*(A*U*m)
where:
A= area of mother tube
U=Velocity of the fluid in the mother tube
M=mass (Density) of the fluid in mother tube.
And for the other daughter tube i did:0.7*(A*U*m)

Is this the correct way to tell Fluent that i want a flow ration of 70:30 at the two outputs?
Thank you