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TECHNICAL PAPERS

Dry Patch Stability of Shear Driven Liquid Films

[+] Author and Article Information
David G. Penn, Martin Lopez de Bertodano, Paul S. Lykoudis

School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907

Stephen G. Beus

Bettis Atomic Power Laboratory, West Mifflin, PA 15122-0079e-mail: beussg@bettis.gov

J. Fluids Eng 123(4), 857-862 (Jun 26, 2001) (6 pages) doi:10.1115/1.1412459 History: Received November 10, 2000; Revised June 26, 2001
Copyright © 2001 by ASME
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References

Hartley,  D. E., and Murgatroyd,  W., 1964, “Criteria for Break-up of Thin Liquid Layers Flowing Isothermally over Solid Surfaces,” Int. J. Heat Mass Transf., 7, pp. 1003–1015.
Murgatroyd,  W., 1965, “The Role of Shear and Form Forces in the Stability of a Dry Patch on Two-phase Film Flow,” Int. J. Heat Mass Transf., 8, pp. 297–301.
Hewitt,  G. F., and Lacey,  P. M. C., 1965, “The Breakdown of the Liquid Film in Annular Two-phase Flow,” Int. J. Heat Mass Transf., 8, pp. 781–791.
Ueda,  T., Inoue,  M., and Nagatome,  S., 1981, “Critical Heat Flux and Droplet Entrainment Rate in Boiling of Falling Liquid Films,” Int. J. Heat Mass Transf., 24, pp. 1257–1266.
Zuber,  N., and Staub,  F. W., 1966, “Stability of Dry Patches Forming in Liquid Films Flowing over Heated Surfaces,” Int. J. Heat Mass Transf., 9, pp. 897–905.
Chung,  J. C., and Bankoff,  S. G., 1980, “Initial Breakdown of a Heated Liquid Film in Co-current Two-component Annular Flow: II. Rivulet and Dry Patch Models,” Chem. Eng. Commun., 4, pp. 455–470.
Hoke,  B. C., Jr., and Chen,  J. C., 1992, “Thermo-capillary Breakdown of Falling Liquid Films,” Ind. Eng. Chem. Res., 31, pp. 688–694.
Seber, H. H., and El-Genk, M. S., 2000, “Determination of the Minimum Thickness of an Isothermal Liquid Film on a Vertical Surface,” Proceedings of the 34th National Heat Transfer Conference, Pittsburgh, PA, August 20–22.
Bankoff,  S. G., 1971, “Stability of Liquid Flow Down a Heated Inclined Plane,” Int. J. Heat Mass Transf., 14, pp. 377–385.
Joo,  S. W., Davis,  S. H., and Bankoff,  S. G., 1996, “A Mechanism for Rivulet Formation in Heated Falling Films,” J. Fluid Mech., 321, pp. 279–298.
PHOENICS, CHAM, Bakery House, 40 High Street, Wimbledon Village, London SW19 5AU, United Kingdom.
Chappius, J. 1982, Multiphase Science and Technology. G. F. Hewitt, J. M. Delhaye, and N. Zuber, eds., Vol. 1, Hemisphere, pp. 387–505.
Henstock,  W. H., and Hanratty,  T. J., 1976, “The Interfacial Drag and Height of the Wall Layer in Annular Flows,” AIChE J., 22, No. 6, pp. 990–1000.
Asali,  J. C., Hanratty,  T. J., and Andreussi,  P., 1985, “Interfacial Drag and Film Height for Vertical Annular Flow,” AIChE J., 31, No. 6, pp. 895–902.

Figures

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Shear shear stresses acting on the control volume (τfg: stress at the liquid gas interface and τfs: stress at the wall)
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Body fitted coordinate grid for dry patch CFD calculations
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Velocity vectors showing the film flow pattern around the dry patch
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Schematic of film flow around dry patch
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Shear stress distribution along the dividing streamline
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Relationship of lambda to the film Reynolds number
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Convergence test of velocity profile across the film
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Schematic of experiment

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