[fazadzulhimam]

I was simulating incompressible flows with boundary condition velocity inlet and outflow, but I have found that negative pressure drop in the result.

when I replace the outflow with the pressure outlet, the pressure drop will be positive but with different result.

is there anything that can help?
many thanks for your help

my case is:
range Re = 7000 - 42000 and velocity inlet: 3-18 m/s
k epsilon and energy on
pressure based
working fluid: incompressible, constant properties, steady

[Aeronautics El. K.]

I think that since it's an incompressible flow the outflow boundary condition should be OK.