3D Simulation of Flow over a Triangular Broad-Crested Weir
Journal Title: Journal of River Engineering - Year 2014, Vol 2, Issue 2
Abstract
On natural streams where it is necessary to measure wide range of discharges, a triangular control has several advantages. Firstly, it provides a large breadth at high flows, so that the backwater effect is not excessive. Secondly, at low flows the breadth is reduced so that the sensivity of the weir remains acceptableBroad-crested weirs are defined as structures where the streamlines run parallel to each other over the weir crown, and the crest of the weir is horizontal. They are widely used in open channels, rivers and irrigation systems. Basic experiments together with Computational Fluid Dynamics (CFD) model were conducted on triangular broad-crested weir to investigate the flow pattern over triangular broad-crested weirs. In this study, volume of fluid (VOF) free surface model three turbulence model of the RNG k–ε, k–ε and the large eddy simulation (LES) to find the water level profile and velocity streamlines. The computational results showed a close agreement with experimental data obtained in the laboratory. Also, results indicate that RNG model has the maximum accuracy in comparison with other turbulence models used in this study
Authors and Affiliations
seyed hooman hoseini
Estimating Earthen Dam-Breach Parameters
Dam failure leads to release of high volume of water which causes huge waves in downstream. Failure in dam may cause financial loss but life losses depend on the drowned zone, population residing in downstream of the...
Study of Hydrological Inflow Regime to the Maroon Reservoir Dam and Flood Events
Maroon Dam with maximum volume of 1274 MCM was built on this river by Khuzestan Water & Power Authority (Dams Identity). The dam Controls the Destroyer Floods and adjusts water And Energy and prevents from seasonal hi...
Determining of Source Rock and Its Characteristics Using Organic Geochemistry Derived from Parent Rock Evaluation, Separation, and Columnar and Gaseous Chromatography on Cretaceous Units in Central Iran at Esfahan
Recently the investigations made on rocks of cretaceous units at central iran have revealed source rocks and their characteristics (Origin, amount, and type, maturation of organic material, hydrocarbure or hydrocarbon...
Dam Break Modeling for Large Earth and Rock-fill Dams
Dam break analysis plays a very important role in the risk assessment of dams. Large dams pose significantly higher risks to the people and property downstream of the dam as compared to smaller dams. So the flooding r...
Determining the Optimum Pools Area and Volume: A case Study for Mazandaran Province
Water scarcity and its negative impacts on agricultural crops is one of the problems faced by agricultural sector. To cope with this, depending on the geographic conditions in each region, contrivances have been espec...