2 replies to this topic

[Ryuk]

Hello,

 

I am looking for guidance in the use of flow pattern maps. I am involved with a multiphase flow research project with several companies, measurement institutes, universities and multiphase flow facilities throughout Europe. I'm currently evaluating the predictive ability of multiphase flow pattern maps against new experimental data. So far I have applied the maps/models of Baker (1954), Mandhane (1974), Beggs and Brill (1973), Taitel and Dukler (1976), Weisman (1979), Beggs and Brill (1973) and Barnea (1987).

 

I am currently trying to set up the flow pattern maps described in "A Mechanistic Model for Multiphase Flow in Pipes" (2000) by Petalas and Aziz. Despite the similarities with earlier papers, I am having difficulties in understanding the approach described in this paper. There are several terms that are somewhat vague and so if anyone has applied this paper previously, then I would greatly appreciate some guidance. One specific example I can think of is the used of the term g_c. According to the terminology, this refers to acceleration due to gravity, relating to the gas core. No further explanation is provided in the paper. It appears to be dimensionless and I can only assume it is a ratio similar to specific gravity. 

 

I apologise for the lack of introduction, we are somewhat pushed for time. I have tried using the search function to answer my question with no success. I hope there is someone who can shed some light on this technique for flow pattern prediction.

 

 

 

[breizh]

http://www.fekete.ca...e-pressdrop.htm

 

You may find pointers from the link above.

 

In addition to the reference above consider this link where you will certainly get answers:

 

http://www.drbratlan...flow-assurance/

 

 

Good luck

Breizh

Edited by breizh, 16 December 2015 - 07:32 PM.

[Ryuk]

breizh,

 

Thank you for your response to my question. I had previously referred to the fekete.ca website, but the page that I viewed was less detailed than the one that you posted. I've found the paper by Petalas and Aziz to be very difficult to follow but the link you provided answered all of my questions.

 

For the sake of anyone who searches this thread in the future, the term g_c that I mentioned previously was; as suspected; a dimensionless correction factor. The letter "c" is not related to the gas core (despite the authors own stated nomenclature), it is a direct reference to another paper and is used for unit conversion.

Edited by Ryuk, 12 January 2016 - 06:56 AM.