[acchavesg]

Hey. Currently we are simulating a system containing a porous medium and one of the results to be analyzed is the pressure drop in the system as a result of the porous medium, but we have a confusion on how the program interprets the pressures of the boundary conditions for our case the velocity of inlet and oulet presure and the pressure that puts you in the operating conditions.

[LuckyTran]

The operating pressure is the reference pressure. Pretty much all other pressures in Fluent are gauge pressures based on this reference pressure (there are no absolute pressures).

The default operating pressure is 101325 Pa. So if you see 0 Pa anywhere like in a plot or report or whatever (it's 0 Pa gauge pressure), it's actually 101325 Pa in absolute pressure.

If you get confused then just set the operating pressure to 0 Pa.