I am introducing myself to AIM for future use needs (hydraulic equipment design) and decided to start with some simple ball valve models that can be obtained online from their producers. Yet my simulations couldn't get close to the official results of pressure drop/volume flow characteristics given on technical datasheets for these valves.
So I tried to look for verification cases for ANSYS and found them in some documentation files on ANSYS site. I wanted to start with something completely easy and decided to go : Pressure Drop in Turbulent Flow Through a Pipe
I designed simple pipe 2 m length, 2 mm diameter and set physics in AIM as stated: inlet vel = 50m/s, outlet press = 0 Pa, also I didn't forget to set right material properties as they differ a little bit from presettings in AIM for air.
Results I get are again way over what I'm expecting, in comparison to pressure drop from verification model: ~21,5 kPa, my results vary from 80 kPa to 50 kPa depending on mesh level (results read as geometric average of total pressure variable for inlet and outlet faces).
Can someone help me get to the reason of my constantly wrong results? I feel like I'm doing some basic mistake on and on..
Thanks in advance,
BTW: File extension of AIM project: ".wbpj" was not allowed to be uploaded together with this post