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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

Falling Film Transitions on Plain and Enhanced Tubes

[+] Author and Article Information
J. F. Roques, V. Dupont, J. R. Thome

Laboratory of Heat and Mass Transfer (LTCM), Department of Mechanical Engineering, Swiss Federal Institute of Technology Lausanne, CH-1015 Lausanne, Switzerland

J. Heat Transfer 124(3), 491-499 (May 10, 2002) (9 pages) doi:10.1115/1.1458017 History: Revised July 09, 2001; Received November 07, 2001; Online May 10, 2002
Copyright © 2002 by ASME
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References

Jakob,  M., 1936, Mech. Eng. (Am. Soc. Mech. Eng.), 58, p. 163.
Nusselt,  W., 1916, “Die oberflächenkondensation des wasserdampfes,” Zeitschr. Ver. Deutch. Ing., 60, pp. 541–569.
Kern,  D. Q., 1958, “Mathematical Development of Loading in Horizontal Condensers,” AIChE J., 4, No. 2, pp. 157–160.
Marto,  P. J., 1986, “Recent Progress in Enhancing Film Condensation Heat Transfer on Horizontal Tubes,” Heat Transfer Eng., 7, pp. 53–63.
Honda, H., Nozu, S., and Takeda, Y., 1987, “Flow Characteristics of Condensation on a Vertical Column of Horizontal Tubes,” Proc. 1987 ASME-JSME Thermal Engineering Joint Conference, Honolulu, Vol. 1 , pp. 517–524.
Hu,  X., and Jacobi,  A. M., 1996, “The Intertube Falling Film Part 1—Flow Characteristics, Mode Transitions and Hysteresis,” ASME J. Heat Transfer, 118, pp. 616–625.
Mitrovic, J., 1986, “Influence of Tube Spacing and Flow Rate on Heat Transfer From a Horizontal Tube to a Falling Liquid Film,” Proc. 8th International Heat Transfer Conf., San Francisco, 4 , pp. 1949–1956.
Taghavi,  K., and Dhir,  V. K., 1980, “Taylor Instability in Boiling, Melting, Condensation or Evaporation,” Int. J. Heat Mass Transf., 23, pp. 1433–1445.
Tang, Z., and Lu, B. Y. C., 1991, “Droplet Spacing of Falling Film Flow on Horizontal Tube Bundles,” Proc. 18th International Congress of Refrigeration, Montreal, 2 , pp. 474–478.
Mitrovic,  J., and Ricoeur,  A., 1995, “Fluid Dynamics and Condensation Heating of Capillary Liquid Jets,” Int. J. Heat Mass Transf., 38, pp. 1483–1494.
Hu,  X., and Jacobi,  A. M., 1998, “Departure-Site Spacing for Liquid Droplets and Jets Falling Between Horizontal Circular Tubes,” Exp. Therm. Fluid Sci., 16, pp. 322–331.
Hu,  X., and Jacobi,  A. M., 1996, “The Intertube Falling Film Part 2—Mode Effects on Sensible Heat Transfer to a Falling Liquid Film,” ASME J. Heat Transfer, 118, pp. 626–633.
Thome,  J. R., 1999, “Falling Film Evaporation: A State-of-the-Art Review of Recent Work,” J. Enhanced Heat Transfer, 6, No. 2-4, pp. 263–277.

Figures

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Comparison of tuberow methods to experimental data by Marto 4
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Diagram of the rig test
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Photos of the test section: (a) test section; and (b) overall view.
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Photographs of the enhanced tubes
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Intertube flow modes on plain tubes: (A) droplet; (B) droplet-column; (C) column; (D) column-sheet; and (E) sheet.
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Transition as a function of relative spacing for plain tube (Ga0.25≈90)
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Transition Reynolds number for low fin tube without spacing effect
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Reynolds transition number for droplet to/from droplet-column transition
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Reynolds transition number for droplet-column to/from column transition
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Reynolds transition number for column to/from column-sheet transition
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Reynolds transition number for column-sheet to/from sheet transition
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Comparison with Honda’s droplet to/from columns correlation
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Comparison with Honda’s columns to/from columns-sheet correlation
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Comparison with Honda’s columns-sheet to/from sheet correlation

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