Free-surface aeration in a steep stepped spillway

Zhang, G. and Chanson, H. (2016). Free-surface aeration in a steep stepped spillway. In: Brian Crookston and Blake Tullis, Hydraulic Structures and Water System Management. 6th IAHR International Symposium on Hydraulic Structures. IAHR International Symposium on Hydraulic Structures, Portland, OR, United States, (30-39). 27-30 June 2016. doi:10.15142/T3670628160853

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Author Zhang, G.
Chanson, H.
Title of paper Free-surface aeration in a steep stepped spillway
Conference name IAHR International Symposium on Hydraulic Structures
Conference location Portland, OR, United States
Conference dates 27-30 June 2016
Proceedings title Hydraulic Structures and Water System Management. 6th IAHR International Symposium on Hydraulic Structures
Place of Publication Logan, UT, United States
Publisher Utah State University
Publication Year 2016
Sub-type Fully published paper
DOI 10.15142/T3670628160853
Open Access Status DOI
ISBN 9781884575754
Editor Brian Crookston
Blake Tullis
Start page 30
End page 39
Total pages 10
Collection year 2017
Language eng
Abstract/Summary Self-aeration has important civil and environmental applications in stepped chutes, ranging from cavitation protection to enhanced air-water mass transfer. Air bubble entrainment occurs when the turbulent stresses in the boundary layer exceed the combined effects of surface tension and buoyancy. The governing equations for air diffusion in the rapidly-varied region next to and in the gradually-varied region away from the inception point of aeration are introduced. New and existing solutions to these equations are discussed and compared with new experimental data. An analytical model for flow bulking is introduced. The concept of negative diffusivity is discussed.
Keyword Stepped spillway
Free-surface aeration
Steep slope
Broad-crested weir
Physical modelling
Air entrainment
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
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Created: Tue, 19 Jul 2016, 06:50:36 EST by Hubert Chanson on behalf of School of Civil Engineering