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
Keywords
Related Articles
- EP ID EP32963
- DOI -
- Views 369
- Downloads 0
Bank Shifting of River Ganga in the Downstream of Bhagalpur Vikramshila Setu
Ganga River, downstream Vikramshila Setu (Bhagalpur, Bihar), is shifting towards its right bank with great effect. Right bank of Ganga is densely populated and has many important structures. In last ten years, riverba...
Utilization of Storm Runoff for Groundwater Recharge in Urban Areas- A Case Study of Gujranwala City in Pakistan
This research highlights the significance of storm runoff for groundwater recharge in urban areas. Due to excessive withdrawal of groundwater in urban areas, the groundwater table is significantly depleting each year....
Water Yield Estimation in Polrudwatershed Based on Empirical Methods and Modelling in Geographic Information System (GIS)
Accurate estimation of basin discharge has been discussed by the experts in various construction projects and this important issue has considerable influence on the design of the required structures and their cost. Ba...
Assessment of Garmsar Optimum Drainage Design Using a Successful Strategy for Salinity Control
A methodology and computer model is developed to determine economically optimum closed subsurface drainage systems in irrigated areas to control salinity. The model maximizes net benefits by comparing profit driven by...
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...