Interactions Between Free-Surface, Free-Stream Turbulence and Cavity Recirculation in Open Channel Flows: Measurements and Turbulence Manipulation

Chanson, Hubert and Gonzalez, Carlos A. (2004). Interactions Between Free-Surface, Free-Stream Turbulence and Cavity Recirculation in Open Channel Flows: Measurements and Turbulence Manipulation. In: Y. Matsumoto, K. Hishida, A. Tomiyama, K. Mishima and S. Hosokawa, Proceedings of the 5th International Conference on Multiphase Flow. 5th International Conference on Multiphase Flow, ICMF'04, Yokohama, Japan, (1-14). 30 May - 4 June, 2004.

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Author Chanson, Hubert
Gonzalez, Carlos A.
Title of paper Interactions Between Free-Surface, Free-Stream Turbulence and Cavity Recirculation in Open Channel Flows: Measurements and Turbulence Manipulation
Conference name 5th International Conference on Multiphase Flow, ICMF'04
Conference location Yokohama, Japan
Conference dates 30 May - 4 June, 2004
Proceedings title Proceedings of the 5th International Conference on Multiphase Flow
Place of Publication Japan
Publisher ICMF
Publication Year 2004
Sub-type Fully published paper
Editor Y. Matsumoto
K. Hishida
A. Tomiyama
K. Mishima
S. Hosokawa
Start page 1
End page 14
Total pages 14
Language eng
Abstract/Summary New experiments were conducted in a large stepped channel with a 22 degree slope operating at large Reynolds numbers. Interactions between free-surface and cavity recirculation were systematically investigated in the skimming flow regime. Turbulence manipulation was further conducted and identical experiments were performed with 4 configurations. Basic results demonstrated a strong influence of cavity vanes (longitudinal ribs) on the air-water flow properties in both free-stream and cavity flows. The air-water flow structure (bubble and droplet size distributions, clustering factor) was significantly affected by the presence of vanes, and greater spray production was observed with the vanes. Air-water velocity and turbulence distributions highlighted further a major impact of the vanes on the entire flow.
Subjects 291803 Turbulent Flows
290802 Water and Sanitary Engineering
291800 Interdisciplinary Engineering
290800 Civil Engineering
Keyword turbulence
air entrainment
free-surface flow
turbulence manipulation
stepped channels
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Additional Notes Paper number 104

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Created: Mon, 08 Aug 2005, 10:00:00 EST by Hubert Chanson on behalf of School of Engineering