IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : A discussion of froude number applicability for description of self-aerated developing open channel ...
A discussion of froude number applicability for description of self-aerated developing open channel flows
Author : WANGRU WEI(1), JUN DENG(2)
Air bubble diffusion in the self-aerated open channel flows is an essential issue, and the development process is affected
by the approach flow characteristics. The flow Froude number was generally used as the hydraulic condition in previous
investigations to study the air transport in uniform air-water flows. However, few of these studies analyzed the
applicability of Froude number in self-aerated developing region. The present investigation systematically model-tested
development of self-aeration diffusion with various approach flow Froude number. The tests results showed that for the
tests under same Froude number condition, the air bubble diffusions are not coincident and no clear trend of the Froude
number effect is observed. Considering that flow Froude number is the factor of flow status: supercritical flow or
subcritical flow, Froude number should not be considered as hydraulic condition for description of air bubble diffusion in
self-aerated developing region. It was demonstrated that the flow status generally misestimates the self-aerated process
in developing open channel flows.
File Size : 1,612,222 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 19/08/2015
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