Experimental study of a positive surge. Part 2: comparison with literature theories and unsteady flow field analysis

Content Provider	Semantic Scholar
Author	Gualtieri, Carlo Chanson, Hubert
Copyright Year	2011
Abstract	A positive surge is a unsteady open channel flow resulting from the rapid rise of the free-surface. The phenomenon may be observed in water supply canals and channels as well as in some estuaries during spring tidal conditions. The formation and development of positive surges can be predicted using the method of characteristics and shallow water equations. The paper is the second part of a study presenting the results from new experimental investigations conducted in a large rectangular channel. Detailed unsteady velocity measurements were performed with a high temporal resolution using acoustic Doppler velocimetry and non-intrusive free-surface measurement devices. Several experiments were conducted with the same initial discharge (Q = 0.060 m3/s) and six different gate openings after closure resulting in both non-breaking undular and breaking bores. A comparison between main features of the undular surges with literature theories demonstrated that the experimental data were mostly in agreement with Andersen’s theory. The analysis of unsteady flow field including Reynolds stresses confirmed and extended previous findings about positive surge hydrodynamics.
Starting Page	641
Ending Page	651
Page Count	11
File Format	PDF HTM / HTML
DOI	10.1007/s10652-011-9222-3
Alternate Webpage(s)	http://staff.civil.uq.edu.au/h.chanson/reprints/efmc_2011_6.pdf
Alternate Webpage(s)	https://page-one.springer.com/pdf/preview/10.1007/s10652-011-9222-3
Alternate Webpage(s)	https://doi.org/10.1007/s10652-011-9222-3
Volume Number	11
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article