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TECHNICAL PAPERS

Gas-Liquid Distribution in the Developing Region of Horizontal Intermittent Flows

[+] Author and Article Information
M. Fossa

DITEC, Dipartimento di Termoenergetica e Condizionamento Ambientale, Università degli Studi di Genova, Via all’Opera Pia 15a-16145 Genova, Italye-mail: mfossa@ditec.unige.it

J. Fluids Eng 123(1), 71-80 (Nov 17, 2000) (10 pages) doi:10.1115/1.1343108 History: Received April 05, 2000; Revised November 17, 2000
Copyright © 2001 by ASME
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References

Figures

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Calibration of the impedance probe, according to the stratified and bubble phase distributions
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Procedure to infer the liquid level values h and hmin from PDF profiles
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Ratio of void fraction values αBA as obtained from different injector tests
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Nydal map 20 for entry length and present operating conditions
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Liquid holdup tracings at different locations along the test pipe and for different operating conditions
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Area average void fraction as a function of the gas volume fraction. Parameter: distance from the phase injection.
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Calculated values of the constant C0 as defined in (3)
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PDF profiles at different locations along the test pipes
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Typical PDF profiles for stratified flow at the tube inlet (x/D=33) when Vsg>2.5 m/s
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PDF profiles at different gas flow rates
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Transition plug/slug flow by the analysis of PDF: the influence of the increasing gas flow rate on the height of the slug peak
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Slug peak amplitudes for different values of Vsg and Vsl
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Mean liquid levels evaluated from PDF analysis at different locations along the pipe
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Minimum liquid levels evaluated from PDF analysis at different locations along the pipe
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Mean liquid levels evaluated from PDF analysis for different values of Vsl
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Minimum liquid levels evaluated from PDF analysis for different values of Vsl
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The ratio between the minimum and the mean liquid levels at x/D=160
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Power spectral densities of void fraction fluctuations. Parameter: location along the pipe
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Slug frequencies as inferred from FFT analysis and comparison with theoretical models

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