3 replies to this topic

[cheerpolo]

I have some two phase flow problems. As the vapor and liquid flow in the pipe, I should how to define the flow patterns and calculate the pressure drop in the pipe. I already had get some information about small size pipe < 4inch from "LUDWIG Chapter 2 Fluid Flow". But for the big pipe, I still have no concept. Could anyone provide any information about defining flow patterns and calculation method of pressure drop?
Besides, which flow pattern would possibly damage the piping or fitting? Having Any method avoid it ?

[Root]

Hi Cheerpolo,

I have studied multiphase processing in my PGD, Hope I can Help you, send me your problem at following email and let me check it.
Sure, I will reply and I suggest some books also.
Email:sadartoorr@gmail.com
Good luck

[Andree]

I recommend CFD (e.g. software Fluent and use of Mixture Model, which is a simplest eulerian approach to modelling of multiphase flow).

[s h z]

For two phase flow one approch is to calculate pressure drop assuming either the gas or liquid is flowing alone and then the two phase flow can be calculated from an empirical, usually non-linear correlation based on the two single-phase results.

see paper by Lockhart & Martinelli (1949)