An Expermentally Validated Model for Two-Phase Pressure Drop in the Intermittent Flow Regime for Noncircular Microchannels

[+] Author and Article Information
Srinivas Garimella, Jesse D. Killion, John W. Coleman

George W. Woodruff School of Mechanical Engineering, Georgia Institue of Technology, Atlanta, GA 30332-0405

J. Fluids Eng 125(5), 887-894 (Oct 07, 2003) (8 pages) doi:10.1115/1.1601258 History: Received April 02, 2002; Revised April 30, 2003; Online October 07, 2003
Copyright © 2003 by ASME
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Test facility schematic
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Noncircular tubes investigated in the present study
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Cross section of assumed flow pattern for model unit cell
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Contribution of each pressure drop mechanism to total pressure drop for each test point
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Comparison of total predicted pressure drop based on frequency model of Tronconi 17 with measured data
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Comparison of total predicted pressure drop based on frequency model of Gregory and Scott 15 with measured data
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Comparison of total predicted pressure drop based on frequency model of Garimella et al. 6, Eq. (21), and Eq. (24) with measured data
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Number of unit cells per meter derived from measured data as a function of slug Reynolds number, comparison with model: Eq. (21) and Eq. (24)
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Comparison of Lockhart-Martinelli, Chisholm, and Friedel two-phase pressure drop models, 22, with measured data
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Predicted effect of tube shape for nominal flow area equivalent to 0.75-mm diameter circular tube, L/Dh,nominal=500




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