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TECHNICAL NOTES

Subcooled Flow Boiling in Circumferentially Nonuniform and Uniform Heated Vertical Channels With Downward Flow

[+] Author and Article Information
Q. Peatiwala

71B Barakat Al-Haidry Memorial Market, Block “E”, North Nazimabad, Karachi 74700, Pakistan e-mail: qpeatiwala@hotmail.com  

R. D. Boyd

Department of Mechanical Engineering, Prairie View A&M University, Prairie View, TX 77446 e-mail: ronald_boyd@pvamu.edu

J. Heat Transfer 122(3), 620-625 (Mar 09, 2000) (6 pages) doi:10.1115/1.1286818 History: Received March 26, 1999; Revised March 09, 2000
Copyright © 2000 by ASME
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References

Figures

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(a) Schematic of the vertical downward flow boiling loop. (b) Wall temperature measurement locations: (i) cross section locations, (ii) axial locations along heated length.
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Control volume for the heated hydraulic diameter model
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Comparisons of low heat flux, single-phase heat transfer data with predictions. Q=125.0 kW/m2;g=500.0 kg/m2;D=15.7 mm; and Tsat=120°C (Chen and Tuzla 15).
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Comparisons of correlations (C) with experimental Freon-11 data for single-phase and two-phase heat transfer coefficients for uniform and single-side heated vertical smooth channels with downward flow for the following flow conditions: G=210.0 kg/m2s,D=25.4 mm;Z=Z4=0.6096 m, with an exit pressure of 0.1843 MPa (absolute)
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Comparisons of correlations (C) with experimental Freon-11 data for single-phase and two-phase heat transfer coefficients for single-side heated vertical smooth channels with downward flow for the following flow conditions: G=210.0 kg/m2s,D=25.4 mm;Z=Z2=0.2032 m, with an exit pressure of 0.1843 MPa (absolute)
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Comparisons of correlations (C) with experimental Freon-11 data for single-phase and two-phase heat transfer coefficients for single-side heated vertical smooth channels with downward flow for the following flow conditions: G=210.0 kg/m2s,D=25.4 mm;Z=Z6=1.016 m, with an exit pressure of 0.1843 MPa (absolute)

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