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TECHNICAL PAPERS

Characteristics of the Liquid Film and Pressure Drop in Horizontal, Annular, Two-phase Flow Through Round, Square and Triangular Tubes

[+] Author and Article Information
Timothy A. Shedd

Multiphase Flow Visualization and Analysis Laboratory, Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, WI 53706e-mail: shedd@engr.wisc.edu

Ty A. Newell

Department of Mechanical and Industrial Engineering, University of Illinois at Urbana–Champaign, Urbana, IL 61801e-mail: t-newell@uiuc.edu

J. Fluids Eng 126(5), 807-817 (Dec 07, 2004) (11 pages) doi:10.1115/1.1792261 History: Received September 18, 2001; Revised April 20, 2004; Online December 07, 2004
Copyright © 2004 by ASME
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References

Figures

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Friction factor versus the Lockhart–Martinelli parameter, Xtt, compiled from the two-phase pressure gradients measured for all of the geometries and flow conditions.
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Schematic of the two-phase flow loop used in this set of experiments
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A comparison of the base liquid film and interfacial waves in annular flow. The optical film thickness measurement reports only the thickness of the base film. These images were obtained using planar laser induced fluorescence.
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Film thickness profiles in a 25.4 mm round tube
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Film thickness profiles in a 12.7 mm round tube
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Film thickness profiles in a 22.1 mm square tube
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Film thickness profiles in a 15.8 mm square tube
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First set of film thickness profiles in the 22.1 mm square tube rotated 45 deg. Note that the labeled flow conditions, A–F, correspond closely with the A–F flow conditions for the unrotated 22.1 mm square results presented above.
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Film thickness profiles in the 15.8 mm square tube rotated 45 deg. Note that the labeled flow conditions, A–F, correspond closely with the A–F flow conditions for the unrotated 15.8 mm square results presented above.
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Film thickness profiles in an equilateral triangular tube with 40 mm sides and the apex up
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Film thickness profiles in an equilateral triangular tube with 40 mm sides and the apex down

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