DISCUSSIONS AND CLOSURES
May 1, 2005

Discussion of “Two-Phase Flow Characteristics of Stepped Spillways” by Robert M. Boes and Willi H. Hager

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Publication: Journal of Hydraulic Engineering
Volume 131, Issue 5
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Acknowledgments

The discussers gratefully thank Jorge Matos, Professor at the Technical University of Lisbon (IST, Portugal) for his valuable comments during his stay as invited Professor at LCH-EPFL, as well as the Federal Office for Water and Geology, Switzerland, for the research grant.

References

André, S. (2004). “High velocity aerated flows on stepped chutes with macro-roughness elements.” PhD thesis, Ecole Polytechnique de Lausanne, Lausanne, Switzerland.
André, S., Boillat, J.-L., and Schleiss, A. (2001). “High velocity two-phase turbulent flow over macro-roughness stepped chutes: Focus on dynamic pressures.” Proc., Int. Symp. on Environmental Hydraulics (CD-Rom), ISEH, eds.
André, S., Boillat, J.-L., and Schleiss, A. J. (2002). “Efficient surface protection by macro-roughness linings for overtopped embankment dams.” Proc., Int. Congress on Conservation and Rehabilitation of Dams, Llanos et al., eds., Balkema, Rotterdam, The Netherlands, 407–415.
André, S., Matos, J., Boillat, J.-L., and Schleiss, A. J. (2004). “Energy dissipation and hydrodynamic forces of aerated flow over macro-roughness linings for overtopped embankment dams.” Proc., Int. Conf. on Hydraulics of Dams and River Structures, April 26-28, 2004, Tehran, Iran, Balkema, Rotterdam, The Netherlands, 189–196.
Bathurst, J. C. (1987). “Closure to ‘Flow resistance estimation in mountain rivers”’ J. Hydraul. Eng., 113(6), 822–824.
Boes, R. M. (2000). “Discussion of ‘Characteristics of skimming flow over stepped spillways’ by M. R. Chamani and N. Rajaratnam.”’ J. Hydraul. Eng., 126(11), 860–862.
Canovaro, F., Paris, E., and Solari, L. (2003). “Analysis of resistance of flow over macro-scale roughness: First results.” Proc., XXX IAHR Congress on Water Engineering and Research in a Learning Society: Modern Developments and Traditional Concepts, Theme C: Hydraulic Resistance, IAHR, Delft, The Netherlands, 1–8.
Chamani, M. R., and Rajaratnam, N. (1999). “Characteristics of skimming flow over stepped spillways.” J. Hydraul. Eng., 125(4), 361–368.
Cubizolles, G. (1996). “Etude stéréologique de la topographie des écoulements diphasiques à haute pression.” PhD thesis, Ecole Centrale Lyon, France (in French).
Matos, J., Frizell, K. H., André, S., and Frizell, K. W. (2002). “On the performance of velocity measurement techniques in air-water flows.” Proc., Int. ASCE—Hydraulic Measurements and Experimental Methods 2002 (CD-Rom), Estes Park, Colorado.
Sayre, W. W., and Albertson, M. L. (1963). “Roughness spacing in rigid open channels.” Trans. Am. Soc. Civ. Eng., 128 (Part I), 343–380.
Schwalt, M., and Hager, W. H. (1992). “Die Strahlbox (“The jetbox”).” Schweizer Ingenieur und Architekt, 110 (27–28), 547–549.
Stutz, B. (1996). “Analyse de la structure diphasique et instationnaire de poches de cavitation.” PhD thesis, Institut National Polytechnique de Grenoble, France (in French).
Tozzi, M. J. (1994). “Residual energy in stepped spillways.” Int. Water Power Dam Constr., 46(5), 32–34.
Yasuda, Y., and Chanson, H. (2003). “Micro and Macro-scopic study of two-phase flow on a stepped chute.” Proc., XXX IAHR Congress on Water Engineering and Research in a Learning Society: Modern Developments and Traditional Concepts, Theme D: Experiments on Stepped Spillways, IAHR, Delft, The Netherlands, 695–702.

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Go to Journal of Hydraulic Engineering
Journal of Hydraulic Engineering
Volume 131Issue 5May 2005
Pages: 423 - 427

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Published online: May 1, 2005
Published in print: May 2005

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Authors

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Stéphanie André [email protected]
AquaVision Engineering, P.O. Box 73 EPFL, CH-1015 Lausanne, Switzerland; formerly, Research Assistant, Laboratory of Hydraulic Constructions (LCH), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland. E-mail: [email protected]
Jean-Louis Boillat [email protected]
Senior, Laboratory of Hydraulic Constructions (LCH), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland. E-mail: [email protected]
Anton J. Schleiss [email protected]
Director, Laboratory of Hydraulic Constructions (LCH), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland. E-mail: [email protected]

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