Novel Approach for Side Weirs in Supercritical Flow

AbstractSide weirs are hydraulic structures widely used in practice and extensively studied in the technical literature. The flow along a side weir is a classic example of spatially varied flow, the study of which is generally performed by means of a momentum or energy approach. The momentum approac...

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Published inJournal of irrigation and drainage engineering Vol. 139; no. 8; pp. 672 - 679
Main Authors Granata, Francesco, de Marinis, Giovanni, Gargano, Rudy, Tricarico, Carla
Format Journal Article
LanguageEnglish
Published Reston, VA American Society of Civil Engineers 01.08.2013
Subjects
Agricultural and forest climatology and meteorology. Irrigation. Drainage
Agronomy. Soil science and plant productions
Applied sciences
Biological and medical sciences
Buildings. Public works
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Irrigation. Drainage
Sewerage. Sewer construction
Technical Papers
Sewer
Critical flow
Supercritical flow
Hydraulics
Weirs
Flow power
Hydraulic structures
Sewers
Experimentation
Hydraulic equipment
Weir
Side weir
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Summary:AbstractSide weirs are hydraulic structures widely used in practice and extensively studied in the technical literature. The flow along a side weir is a classic example of spatially varied flow, the study of which is generally performed by means of a momentum or energy approach. The momentum approach is usually more accurate but requires the experimental estimation of correction coefficients leading to a formulation that is difficult to apply to a practical design. The energy approach, instead, is not as accurate when the flow depths on the side weir are significantly higher than the same weir crest. A novel, simplified theoretical model for the study of single side weir in a circular pipe, operating in supercritical flow, is proposed. The model originates from an experimental analysis of the flow power variation along the side weir. The proposed model has shown good performance in free surface representation and is capable of estimating the lateral outflow with good accuracy. The suggested formulation is compared with others of acknowledged value, showing comparable performance.
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ISSN:0733-9437
1943-4774
DOI:10.1061/(ASCE)IR.1943-4774.0000600