Air-water flow properties in stepped chutes with modified step and cavity geometries

Gangfu Zhang and Hubert Chanson (2018) Air-water flow properties in stepped chutes with modified step and cavity geometries. International Journal of Multiphase Flow, 99 423-436. doi:10.1016/j.ijmultiphaseflow.2017.11.009

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Author Gangfu Zhang
Hubert Chanson
Title Air-water flow properties in stepped chutes with modified step and cavity geometries
Journal name International Journal of Multiphase Flow   Check publisher's open access policy
ISSN 0301-9322
Publication date 2018-02-01
Year available 2017
Sub-type Article (original research)
DOI 10.1016/j.ijmultiphaseflow.2017.11.009
Open Access Status Not yet assessed
Volume 99
Start page 423
End page 436
Total pages 14
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Subject 2210 Mechanical Engineering
3100 Physics and Astronomy
1507 Fluid Flow and Transfer Processes
Abstract Skimming air-water flow properties were investigated in a stepped chute configured with triangular steps, chamfered steps, and partially blocked step cavities. The turbulent interactions between air and water were examined using a synchronised system consisting of a dual-tip phase-detection probe and a pressure transducer mounted side-by-side. In comparison to uniform triangular steps, the chamfered steps were found to cause a reduction in air entrainment and an increase in mean velocity gradient next to the pseudo-bottom. Partial cavity blockages appeared to have little effect on air entrainment, but were linked to an increased presence of large-scale structures in the overflow, which likely resulted from a reduction in mutual sheltering between adjacent step elements. The results indicated that modifications of step and cavity geometries might have significant implications on stepped chute design.
Keyword Multiphase flow
Air entrainment
Stepped spillway
Physical modelling
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID DP120100481
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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Created: Wed, 10 Jan 2018, 11:13:34 EST by Gangfu Zhang on behalf of School of Civil Engineering