boundary condition inside a cylinder
 

hi

I'm a new OF user.
I have a cylinder which has 10 holes on its side surface as inlets. there is a top outlet.
I try to model the flow inside the tube by icoFoam.
I know the inlet's surface area and also the volume flux(m3/h) and also inlets pressure so I can calculate the velocity inlet. I know the inlet temperature too.
I know the outlet pressure also,and its temperature.
but I don't know how to set my boundary condition and which kind of them should be chosen.:confused:
I look forward to see your helps.

thank you in advanced.

Mohsen Khandan