Abstract
This study reexamines flow over a sharp-crested weir using computational fluid dynamics (CFD) to identify the optimal operating range under which the weir functions with accuracy as a free-flowing measurement device. A numerical parametric study was conducted for two separate channel and weir geometries under a range of flow rates resulting in different h/P values, where h is the elevation head over the weir crest, and P is the weir height. Analysis of velocity and pressure profiles over the weir revealed three distinct flow regimes: a high acceleration regime, an ideal operating regime, and a weir-inundated regime that may lead to submerged flow. The high acceleration regime correlates to flows with h/P< 0.6, and the weir-inundated regime occurred when h/P>2.0. The ideal operating regime was found to occur in the range 0.6
Recommended Citation
J. M. Sinclair et al., "Some Insights on Flow over Sharp-Crested Weirs using Computational Fluid Dynamics: Implications for Enhanced Flow Measurement," Journal of Irrigation and Drainage Engineering, vol. 148, no. 6, article no. 04022011, American Society of Civil Engineers, Jan 2022.
The definitive version is available at https://doi.org/10.1061/(ASCE)IR.1943-4774.0001652
Department(s)
Civil, Architectural and Environmental Engineering
International Standard Serial Number (ISSN)
1943-4774; 0733-9437
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 American Society of Civil Engineers, All rights reserved.
Publication Date
01 Jan 2022
