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research article

Void fraction prediction in annular two-phase flow

Cioncolini, Andrea  
•
Thome, John R.  
2012
International Journal Of Multiphase Flow

A new method to predict the void fraction in annular two-phase flow in macroscale and microscale channels is presented. The underlying experimental database contains 2673 data points collected from 29 different literature studies for 8 different gas-liquid and vapor-liquid combinations (water-steam, R410a, water-air, water-argon, water-nitrogen, water plus alcohol-air, alcohol-air and kerosene-air), for tube diameters from 1.05 mm to 45.5 mm and for both circular and non-circular channels. The new prediction method is strongly simplified with respect to most existing correlations, as it depends only on vapor quality and the gas to liquid density ratio and reproduces the available data better than existing prediction methods. Importantly, this study shows that there appears to be no macro-to-microscale transition in annular flows, at least down to diameters of about 1.0 mm. (C) 2012 Elsevier Ltd. All rights reserved.

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Type
research article
DOI
10.1016/j.ijmultiphaseflow.2012.03.003
Web of Science ID

WOS:000304689200008

Author(s)
Cioncolini, Andrea  
•
Thome, John R.  
Date Issued

2012

Published in
International Journal Of Multiphase Flow
Volume

43

Start page

72

End page

84

Subjects

Annular two-phase flow

•

Void fraction

•

Microscale

•

Macroscale

•

Flow regime

•

Flow pattern

•

Gas-Liquid Flow

•

Pressure-Drop

•

Microchannels

•

Velocity

•

Upflow

•

Steam

•

Tubes

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LTCM  
Available on Infoscience
July 13, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/83878
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