[Inderjeet Singh]

Hello all,

I have to perform a 3-D CFD analysis of air flow in a pipe using Fluent.

Experimentally the inlet is attached to blower for providing some fixed mass flow rate or velocity.
The length of pipe will be say 50 inches and i have to measure pressure at 5 diff. locations say- 5, 10, 20,30,40, and outlet at 50 inches.

Q 1. What will be best model for analysis ?
Q 2. Which type of boundary conditions should be applied at inlet and outlet - Velocity inlet and pressure outlet ?
Q 3. How can i measure pressure difference at those 5 locations.
Q 4. Will "Pressure-outlet" boundary condition by default sets Outlet pressure to Atmospheric pressure ??
Q 5. Will there be difference in these 2 Cases -

Case A - Modelling full 50 inches and calculating pressure difference at 5 locations from one Simulation.
Case-B - Modelling 5 lengths differently and analyze them separately with Pressure-Outlet boundary condition.

I would like if the answer mentions to my question number. Thanx in advance