Two phase flow pressure drop in a perforated pipe

[SheydaTamuzi]

Hello everybody,
I want to calculate the pressure drop in a perforated pipe which is responsible for distributing a two phase flow in a stripping tower. The vapor volume flow rate is 68% of total flow rate. Perforated pipe diameter, the holes quantity and their diameter, vapor and liquid phase flow rates, their composition and density are known. Please let me know how can I calculate the pressure drop? (specially pressure drop through the holes) It would be appreciated, if anybody can introduce me any reference as well.

 

[met11]

This paper should be of help:

http://www.fem.unicamp.br/~phoenics...rojetos/ORIFICE PLATE FLOW METER/091301_1.pdf

Section 2.2 "Two-Phase Flow" seems to be what you're looking for. You'll have to assume the flow gets split equally among all the orifices or something, but it should be decently close to get you an estimate of pressure drop. I doubt you could do this super accurately anyways without CFD, if I'm picturing the perforated pipe correctly. Have fun!