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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

A Method for Assessing the Importance of Body Force on Flow Boiling CHF

[+] Author and Article Information
Hui Zhang, Issam Mudawar

Boiling and Two-phase Flow Laboratory, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA

Mohammad M. Hasan

NASA Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135, USA

J. Heat Transfer 126(2), 161-168 (May 04, 2004) (8 pages) doi:10.1115/1.1651532 History: Received June 03, 2003; Revised November 19, 2003; Online May 04, 2004
Copyright © 2004 by ASME
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References

Class, C. R., DeHaan, J. R., Piccone, M., and Cost, R. B., 1960, “Boiling Heat Transfer to Liquid Hydrogen from Flat Surfaces,” Advances in Cryogenic Engineering, K. D. Timmerhaus, ed., Plenum Press, New York, 5 , pp. 254–261.
Marcus,  W. R., and Dropkin,  D., 1963, “The Effect of Surface Configuration on Nucleate Boiling Heat Transfer,” Int. J. Heat Mass Transfer, 6, pp. 863–867.
Nishikawa, K., Fujita, Y., Uchida, S., and Ohta, H., 1983, “Effect of Heating Surface Orientation on Nucleate Boiling Heat Transfer,” Proc. ASME-JSME Thermal Engineering Joint Conference, Y. Mori and W. J. Yang, eds., Honolulu, HI, 1 , pp. 129–136.
Mudawar,  I., Howard,  A. H., and Gersey,  C. O., 1997, “An Analytical Model for Near-Saturated Pool Boiling CHF on Vertical Surfaces,” Int. J. Heat Mass Transfer, 40, pp. 2327–2339.
Howard,  A. H., and Mudawar,  I., 1999, “Orientation Effects on Pool Boiling CHF and Modeling of CHF for Near-Vertical Surfaces,” Int. J. Heat Mass Transfer, 42, pp. 1665–1688.
Simoneau, R. J., and Simon, F. F., 1966, “A Visual Study of Velocity and Buoyancy Effects on Boiling Nitrogen,” NASA Tech Note TN D-3354.
Mishima,  K., Nishihara,  H., and Michiyoshi,  I., 1985, “Boiling Burnout and Flow Instabilities for Water Flowing in a Round Tube under Atmospheric Pressure,” Int. J. Heat Mass Transfer, 28, pp. 1115–1129.
Gersey,  C. O., and Mudawar,  I., 1993, “Orientation Effects on Critical Heat Flux from Discrete, In-Line Heat Sources in a Flow Channel,” ASME J. Heat Transfer, 115, pp. 973–985.
Galloway,  J. E., and Mudawar,  I., 1993, “CHF Mechanism in Flow Boiling from a Short Heated Wall-Part 1. Examination of Near-Wall Conditions with the Aid of Photomicrography and High-Speed Video Imaging,” Int. J. Heat Mass Transfer, 36, pp. 2511–2526.
Galloway,  J. E., and Mudawar,  I., 1993, “CHF Mechanism in Flow Boiling from a Short Heated Wall-Part 2. Theoretical CHF Model,” Int. J. Heat Mass Transfer, 36, pp. 2527–2540.
Zhang,  H., Mudawar,  I., and Hassan,  M. M., 2002, “Experimental and Theoretical Study of Orientation Effects on Flow Boiling CHF,” Int. J. Heat Mass Transfer, 45, pp. 4463–4478.
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Figures

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Variation of 1/Fr with flow orientation and velocity for (a) all velocities tested and (b) U≥0.5 m/s
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Determination of minimum flow velocity required to overcome all body force effects on flow boiling CHF
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(a) Heater inserted into bottom plate of test module; and (b) Two-phase flow loop
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Flow orientation guide indicating flow direction, channel orientation, and heater location (indicated by black rectangle)
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(a) CHF regime map; and (b) Typical flow characteristics for each regime
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Sequential images of vapor layer at (a) θ=90 deg and U=1.5 m/s, (b) θ=0° and U=0.1 m/s, (c) θ=180 deg and U=0.1 m/s, (d) θ=225 deg and U=0.1 m/s, (e) θ=270 deg and U=0.1 m/s, and (f ) θ=270 deg and U=0.5 m/s
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CHF variation with orientation and flow velocity
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Comparison of CHF data for lowest and highest velocities with predictions based on previous models and correlations for 5 mm×2.5 mm rectangular channel and operating conditions of present study
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Variation of Bo/We2 with flow orientation and velocity for (a) all velocities tested and (b) U≥0.5 m/s

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