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History and physical significance of the roughness Froude number.

Authors :
Wahl, Tony L.
Source :
Journal of Hydraulic Research / Journal de Recherches Hydraulique. Apr2023, Vol. 61 Issue 2, p173-182. 10p.
Publication Year :
2023

Abstract

The roughness Froude number is a relatively new dimensionless parameter that began appearing in the hydraulic engineering literature in the late 1970s, first for the analysis of aeration inception in smooth chutes, and then later in connection with stepped chutes. This article reviews its foundations, historical development, alternative forms, present-day applications, and physical significance, which has received little attention previously. In addition to its empirically demonstrated connection to aeration inception, this paper shows that one form of a roughness Froude number has a strong relation to the transition between nappe and skimming flow regimes of stepped chutes, while another combines the dimensionless flow friction factor and the relative submergence of roughness elements. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00221686
Volume :
61
Issue :
2
Database :
Academic Search Index
Journal :
Journal of Hydraulic Research / Journal de Recherches Hydraulique
Publication Type :
Academic Journal
Accession number :
163886273
Full Text :
https://doi.org/10.1080/00221686.2022.2161958