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TECHNICAL PAPERS

Continuous Wavelet Transforms of Instantaneous Wall Pressure in Slug and Churn Upward Gas-Liquid Flow

[+] Author and Article Information
Heather L. McClusky, Mary V. Holloway, Donald E. Beasley, Jay M. Ochterbeck

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634

J. Fluids Eng 124(3), 625-633 (Aug 19, 2002) (9 pages) doi:10.1115/1.1490376 History: Received September 07, 2000; Revised March 04, 2002; Online August 19, 2002
Copyright © 2002 by ASME
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References

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Figures

Grahic Jump Location
Drawing of the experimental facility
Grahic Jump Location
Flow regime map showing the experimental data from the present study and flow regime transition boundaries (Dp=22 mm, Fluids: Air and Water, Temperature=20°C, Pressure=101 kPa). Transition boundaries were predicted from the entry length model of Taitel et al. 3, the bubble coalescence model of Braunner and Barnea 6, the wake effect model of Mishima and Ishii 4, and the flooding model of McQuillan and Whalley 2.
Grahic Jump Location
Fourier energy spectra representing well-defined slug flow with Ul=0.0055 m/s and Ug=1.01 m/s
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Fourier energy spectra representing well-defined churn flow with Ul=0.0055 m/s and Ug=2.57 m/s
Grahic Jump Location
Wall pressure (fluctuating component) and scalogram for slug flow with Ul=0.0055 m/s and Ug=1.01 m/s (a) 0–12 seconds, (b) 12–24 seconds
Grahic Jump Location
Wall pressure (fluctuating component) and scalogram for churn flow with Ul=0.0055 m/s and Ug=2.57 m/s
Grahic Jump Location
Wall pressure (fluctuating component) and scalogram for flow near the slug to churn transition with Ul=0.0055 m/s and Ug=1.49 m/s
Grahic Jump Location
Wall pressure (fluctuating component) and scalogram for flow near the slug to churn transition with Ul=0.0055 m/s and Ug=1.57 m/s (a) 12–24 seconds, (b) 24–36 seconds
Grahic Jump Location
Wall pressure (fluctuating component) and scalogram for flow near the slug to churn transition with Ul=0.0055 m/s and Ug=1.68 m/s
Grahic Jump Location
Wall pressure (fluctuating component) and scalogram for slug flow with Ul=0.055 m/s and Ug=0.89 m/s
Grahic Jump Location
Wall pressure (fluctuating component) and scalogram for flow near the slug to churn transition with Ul=0.055 m/s and Ug=1.46 m/s
Grahic Jump Location
Wall pressure (fluctuating component) and scalogram for churn flow with Ul=0.055 m/s and Ug=1.86 m/s

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