local restriction (2P)

How to model the local restriction (2P) for a specific pressure differential? Using parameters from a thermostatic expansion valve seems to not do the trick. Any other method that can be used to appropriately size this component?

Thanks.

P.S. Any reference would be helpful.

Answer 1

[Yifeng Tang]

Depending on what you mean by "a specific pressure differential":

If you just want to drop/increase the pressure, regardless of flow rate, which is quite unlikely, you can just use a pressure source with a negative pressure increase.

If you want to find the orifice area needed to achieve a certain pressure drop by a given flow, like from a data sheet, you can set up a test harness with two ends of the restriction connected to reservoirs set at the specified pressure, then watch the flowrate. Adjust the restriction area so you get the right flowrate.