Hi,
I'm trying to simulate the flow of CO2 gas through a metalic filter that is placed at the inlet of the vessel, but the results that i get doenst look reliable. I want to see how is the flow through the filter and the pressure drop at the outlet of the vessel.
Should i also add the pressure at the inlet or only the flow rate ? If i set the outlet as environment pressure I will be able the find the pressure drop ?
You have a pretty big difference between the diameter of your vessel and the diameter of the holes in your filter, the first thing I would do is check the mesh and see how many cells you have through each hole in the filter, make sure you have good resolution there.
Personally, what I would do is simulate the filter separately with different pressures at the inlet to get a pressure/flow curve. Then I would use that data with a porous medium in the larger vessel simulation.
Thanks for the reply, i will look for those comments. I need to add BC for the filter as wall ? ( to calculate the friction with the fluid and get the pressure drop ?)
No, you already have the physical geometry in your simulation, the wall already exists.
Ok.
Another point is the BC for the outlet of the flow, if I add the environment pressure i wont be able to get the real pressure drop, since the DP will be the inlet - the environment pressure( that is normaly 1atm).
If you are looking for pressure drop then I would recommend setting a mass/flow rate into the system and ambient conditions at the outlet. This will show you how much pressure is required at the inlet to move the required amount of mass/volume.
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