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TECHNICAL PAPERS

Determination of Entrained Fraction in Vertical Annular Gas/Liquid Flow

[+] Author and Article Information
Barry J. Azzopardi

School of Chemical, Environmental and Mining Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom

Sohail H. Zaidi

Department of Mechanical and Aerospace Engineering, Princeton University, NJ 08544

J. Fluids Eng 122(1), 146-150 (Dec 06, 1999) (5 pages) doi:10.1115/1.483236 History: Received April 30, 1998; Revised December 06, 1999
Copyright © 2000 by ASME
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References

Figures

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Plot of fractional liquid take off against fractional gas take off for extraction through a porous wall section—gas flow rate=0.0252 kg/s, liquid flow rate=0.063 kg/s. The uncertainty in the fractional liquid flow taken off is estimated to be ±5 percent and that for the gas to be ±2 percent.
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Plot of fractional liquid take off against fractional gas take off for extraction through a porous wall section—gas flow rate=0.0044 kg/s, liquid flow rate=0.063 kg/s. The uncertainty in the fractional liquid flow taken off is estimated to be ±5 percent and that for the gas to be ±2 percent.
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Schematic of test section showing method of film removal and details of windows for entry and exit of light
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Comparison between measured drop velocity and superficial gas velocity—data of Fore and Dukler 89, 0.05 m diameter pipe; Azzopardi and Teixeira 7, 0.032 m diameter pipe; Azzopardi and Zaidi 10, 0.038 m diameter pipe. The uncertainty in the superficial gas velocity is estimated to be ±2 percent.
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Comparison of entrained liquid mass flux derived from light scattering measurements and film extraction measurements. The uncertainty in the former is estimated to be ±5.5 percent and that for the latter to be ±5 percent.
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Entrained liquid mass flux. The uncertainty in the entrained liquid mass flux is estimated to be ±5.5 percent and that for the superficial gas velocity to be ±2 percent.
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Effect of superficial gas velocity on entrainment, experiment and model—total liquid mass flux=80 kg/m2 s. The uncertainty in the entrained liquid mass flux is estimated to be ±5.5 percent and that for the superficial gas velocity to be ±2 percent.

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