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TECHNICAL PAPERS

Experiments and Modeling in Bubbly Flows at Elevated Pressures

[+] Author and Article Information
Ranganathan Kumar

Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL 32816

Thomas A. Trabold

Géneral Motors Corporation, Honeoye Falls, NY 14612

Charles C. Maneri

Lockheed Martin Corporation, One River Road, Schenectady, NY 12301

J. Fluids Eng 125(3), 469-478 (Jun 09, 2003) (10 pages) doi:10.1115/1.1567308 History: Received December 05, 2001; Revised November 13, 2002; Online June 09, 2003
Copyright © 2003 by ASME
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References

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Liu,  T. J., 1993, “Bubble Size and Entrance Length Effects on Void Development in a Vertical Channel,” Int. J. Multiphase Flow, 19(1), pp. 99–113.
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Jones,  O. C., and Zuber,  N., 1978, “Use of a Cylindrical Hot-Film Anemometer for Measurement of Two-Phase Void and Volume Flux Profiles in a Narrow Rectangular Channel. Heat Transfer: Research and Application,” AIChE Symp. Ser. 74(174), pp. 191–204.
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de Carvalho, R., and Bergles, A. E., 1992, “The Pool Boiling and Critical Heat Flux of Vertically Oriented, Small Heaters Boiling on One Side,” Rensselaer Polytechnic Institute, Heat Transfer Laboratory Report HTL-12.
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Figures

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Schematic of the front view of the test section. Thickness dimension is perpendicular to the paper.
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Bubble frequency at α=0.5 for different flow rates and pressure using the hot film anemometer
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Photograph of bubbly flow at α=0.25;w=532 kg/hr;P=1.4 MPa. The snapshot captures the entire width of the test section.
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Relationship between liquid subcooling and bubble departure diameter measured from photographs
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Relationship between local void fraction and local bubble diameter measured using the hot film anemometer
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Relationship between bubble diameter and rise velocity measured using the hot film anemometer and a high-speed video camera
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Local void fraction distribution using the hot film anemometer at two axial locations compared with line-averaged void fraction from the gamma densitometer for Case 1 in Table 1. Cross-section averages from the GDS are provided in the inset.
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Local void fraction distribution using the hot film anemometer at two axial locations compared with line-averaged void fraction from the gamma densitometer for Case 2 in Table 1. Cross-section averages from the GDS are provided in the inset.
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Local void fraction distribution using the hot film anemometer at two axial locations for Case 3 in Table 1. Cross-section averages from the GDS are provided in the inset.
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Local void fraction distribution using the hot film anemometer at two axial locations for Case 4 in Table 1. Cross-section averages from the GDS are provided in the inset.

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