I'm trying to find out the value of the pressure to which the walls of the stuffing box will be subjected. The flow goes through the orifice that reduces the diameter of the inlet from 0.46" to 0.125". I need to find the values of the pressure with and without the orrifice.
It seems like something is wrong with my setup as I'm getting weird results. First I was getting really high numbers, then I started to get values closer to real ones but the result was surprising - the pressure was higher when the orifice was used (see pictures attached).
I simplified the model of the stuffing box as much as it was possible. Also I tried different configurations of the model (with side walls created in SolidWorks and with walls created by Autodesk CFD; with/without pipe), however I was not able to get accurate results. I tried to apply velocity, mass flow and presure at the inlet.
Please suggest possible mistakes.
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