I'm a bit confused about the momentum flux correction factor which shows up in the conservation of linear momentum equation for fluids. What I am confused about is when the factor is used. The linear momentum equation has its general form and then a simplified form where the momentum flux integral reduces to [itex]\dot m V [/itex] for duct flow through a one dimensional cross-section. Is the correction factor applied to the general equation or the simplified one? I think it is the simplified form because the integral would take care of the non uniform flow but I just want to be sure before I write it down in my notes.