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- Title
PROPER RELATIONSHIP OF MANNING'S COEFFICIENT IN A PARTIALLY FILLED CIRCULAR PIPE.
- Authors
B., ACHOUR; L., AMARA
- Abstract
The Manning's n coefficient represents the friction applied to the flow by the inner wall of a channel or a pipe. For a correct design of hydraulic systems, the designer should have an appropriate value of this coefficient. The present study aims to establish the proper Manning's n relationship including all the parameters that affect the flow in a partially filled circular pipe, such as the relative roughness, the slope of the energy grade line, and the kinematic viscosity. A new dimensionless parameter, acting as a Reynolds number, is introduced reflecting the relative effect of friction forces versus viscous forces. The study highlights the significant role of this parameter in the variation of the Manning's n coefficient with the relative flow depth.
- Subjects
VISCOSITY; FLOW coefficient; KINEMATIC viscosity; REYNOLDS number; CONTROLLED low-strength materials (Cement); PIPE
- Publication
Larhyss Journal, 2020, Issue 42, p107
- ISSN
1112-3680
- Publication type
Article