Evaluation of pressure drop.
 

Hello, I have carry out a simulation in order to evaluate the total pressure drop in a duct (with some convergents, deflectors,...) and the result is very different (x10) with a calculation did with litterature (Idel'cik). So I am very septic about the CFD result (low of the determined value). Is CFD really able to determine it?

Re: Evaluation of pressure drop.
 

The accuracy of the CFD simulation depends on many things.

1. How accurately you model the problem ? 2. Proper Boundary Condition 4. Have enough points to resolve the boundary layer if the flow is viscous

being some of them.

What software did you use for your problem ? What kind of Numerical Discretization and boundary conditions? Did you get a qualitative match ?

Re: Evaluation of pressure drop.
 

We have done several simulations for ducts on the order of 10 feet across with good results for pressure drop, using Fluent.