[Guille1811]

I have set a static pressure outlet for my simulation in the form of the following function:

1.474[atm]*exp(-g/R*(17/12*0.029)[kg m K^-1 mol^-1]*ln(12[m^-1]*y+4589))-0.98[atm])

where Y is the vertical position.

As you can see in the picture attached, it is a decreasing function so the relative pressure at higher hights is lower (as it should be). The thing is when i run the simulation and then see a pressure countour on that boundary on post processing, the function inverts itself, in other words, the relative pressure is lower at LOWER hights. I tried multiplyng the whole function by -1 to see what happens and it gave me function behaviour, but with higher pressures overall.

Anyone know why this happens and/or how can i fix it?