Flow Characteristics of Skimming Flows in Stepped Channels

Gonzalez, Carlos A. and Chanson, Hubert (2006) Flow Characteristics of Skimming Flows in Stepped Channels. Journal of Hydraulic Engineering, 132 5: 537-539. doi:10.1061/(ASCE)0733-9429(2004)130:9(860)

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Author Gonzalez, Carlos A.
Chanson, Hubert
Title Flow Characteristics of Skimming Flows in Stepped Channels
Journal name Journal of Hydraulic Engineering   Check publisher's open access policy
ISSN 0733-9429
Publication date 2006-05-01
Sub-type Editorial
DOI 10.1061/(ASCE)0733-9429(2004)130:9(860)
Open Access Status File (Author Post-print)
Volume 132
Issue 5
Start page 537
End page 539
Total pages 3
Language eng
Subject 260502 Surfacewater Hydrology
240502 Fluid Physics
291100 Environmental Engineering
290000 Engineering and Technology
291800 Interdisciplinary Engineering
260000 Earth Sciences
300100 Soil and Water Sciences
291803 Turbulent Flows
240500 Classical Physics
260500 Hydrology
290802 Water and Sanitary Engineering
300105 Applied Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
291199 Environmental Engineering not elsewhere classified
290800 Civil Engineering
Abstract Ohtsu et al. must be congratulated for their systematic study of skimming flows on stepped channels with different slopes and step heights. Their experimental data provide a solid database that might lead to better and improved design criteria. Important outcomes include some estimate of friction factors for skimming flows and a design flow chart for stepped canals. Despite these outstanding results, the writers would like to comment constructively on further design criteria for skimming flows, and to provide additional flow resistance results and a discussion on the physical processes. It is hoped that the present contribution will add to safer stepped chute design. The writers would like to point out that the energy dissipation performances of stepped canals with moderate slopes are far from being totally understood and further experimental research is needed.
Keyword stepped spillway
skimmming flow
transition flow
flow resitance
maximum discharge
physical processes
References Andre, S., Boillat, J.L., Schleiss, A.J., and Matos, J. (2004). "Energy dissipation and hydrodynamic forces of aerated flow over macro-roughness linings for overtopped embankment dams." Proc. Intl Conf. on Hydraulics of Dams and River Structures, Tehran, Iran, Balkema Publ., The Netherlands, pp. 189-196. Chanson, H. (1995). "Hydraulic Design of Stepped Cascades, Channels, Weirs and Spillways." Pergamon, Oxford, UK, Jan., 292 pages. Chanson, H. (2001). "The Hydraulics of Stepped Chutes and Spillways." Balkema, Lisse, The Netherlands, 418 pages. Chanson, H., and Gonzalez, C.A. (2004). "Stepped Spillways for Embankment dams: Review, Progress and Development in Overflow Hydraulics." Proc. Intl Conf. on Hydraulics of Dams and River Structures, Tehran, Iran, Balkema Publ., The Netherlands, pp. 287-294 Chanson, H., and Toombes, L. (2002a). "Energy Dissipation and Air Entrainment in a Stepped Storm Waterway: an Experimental Study." Jl of Irrigation and Drainage Engrg., ASCE, Vol. 128, No. 5, pp. 305-315. Chanson, H., and Toombes, L. (2002b). "Air-Water Flows down Stepped chutes : Turbulence and Flow Structure Observations." Intl Jl of Multiphase Flow, Vol. 27, No. 11, pp. 1737-1761 (ISSN 0301-9322). Chanson, H., Yasuda, Y., and Ohtsu, I. (2002). "Flow Resistance in Skimming Flows and its Modelling." Can Jl of Civ. Eng., Vol. 29, No. 6, pp. 809-819. Gonzalez, C.A., and Chanson, H. (2004). "Interactions between Cavity Flow and Main Stream Skimming Flows: an Experimental Study." Can Jl of Civ. Eng., Vol. 31, No. 1, pp. 33-44. Lin, J.C., and Rockwell, D. (2001). "Organized Oscillations of Initially Turbulent Flow past a Cavity." AIAA Jl, Vol. 39, No. 6, pp. 1139-1151. Ohtsu, I., and Yasuda, Y. (1997). "Characteristics of Flow Conditions on Stepped Channels." Proc. 27th IAHR Biennal Congress, San Francisco, USA, Theme D, pp. 583-588. OHTSU, I., YASUDA, Y., and TAKAHASHI, M. (2004). "Flow Characteristics of Skimming Flows in Stepped Channels." Jl of Hyd. Engrg., ASCE, Vol. 130, No. 9, pp. 860-869.
Q-Index Code CX
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes GONZALEZ, C.A., and CHANSON, H. (2006). "Flow Characteristics of Skimming Flows in Stepped Channels. Discussion." Jl of Hyd. Engrg., ASCE, Vol. 132, No. 5, pp. 537-539 (doi:10.1061/(ASCE)0733-9429(2006)132:5(537)) (ISSN 0733-9429).

Document type: Journal Article
Sub-type: Editorial
Collections: Excellence in Research Australia (ERA) - Collection
School of Civil Engineering Publications
 
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Created: Fri, 05 May 2006, 10:00:00 EST by Hubert Chanson on behalf of Library Corporate Services