The expansion characteristics of free surface flow

McMahon, G. M. (1979). The expansion characteristics of free surface flow Master's Thesis, School of Engineering, The University of Queensland.

       
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Author McMahon, G. M.
Thesis Title The expansion characteristics of free surface flow
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 1979
Thesis type Master's Thesis
Total pages 190
Language eng
Subjects 09 Engineering
Formatted abstract

The experimental work reported on in this Thesis is directed at the phenomenon of separation of the flow from the walls of the expanding outlets from minimum specific energy culverts. The experiments have, as their aim, the mapping of the geometric limits to these expansions such that separation does not occur. 

 

The results, to varying degrees, outline the effects that several factors have on the no separation flow regime; most prominent of these factors are the angle of divergence of the walls, the aspect ratio of the flow, the Froude number of the flow, and two anti separation devices (a raised floor and baffles). Additionally, information is provided on the pattern of head losses experienced by critical and subcritical flows in passing through free surface flow expansions. 

 

An argument is also offered on the relative merits of an experimental approach to a study of the subject phenomena, as against a more mathematical approach by the use of boundary layer equations.

Keyword Culverts
Fluid dynamics
Additional Notes

Variant title: Expanding free surface flow.

 
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