LARHYSS Journal
Volume 17, Numéro 3, Pages 74-89
2020-10-18
New Theoretical Considerations On The Critical Flow In A Circular Conduit (part 1)
Authors : Achour Bachir . Amara Lyes .
Abstract
In a circular conduit of diameter D and of a given slope , two critical states of the flow may occur for two different discharges. The first one is observed at shallow depths while the second one settles down at greater depths. This statement is the result of the in-depth study carried out on the smooth circular conduit of diameter D = 1m, taken as an example. For this conduit, all slopes greater than generate the two critical states of the flow. Slopes that are less than this value do not generate any critical state of the flow. The study reveals that the slope corresponds to the smallest slope that causes a single critical state of the flow. Other interesting conclusions, fundamental relationships as well as meaningful graphs are drawn from this study, after a detailed examination of the rational equations which govern the critical and normal flows.
Keywords
Circular conduit ; critical depth ; normal depth ; slope ; discharge
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