TY  - JOUR
T1  - Evaluation of Flow behavior over Broad-Crested Weirs of a Triangular Cross-Section using CFD Techniques
AU  - A. Al-dabbagh, Mohammad
AU  - D. Al-zubaıdy, Sulaiman
PY  - 2018
DA  - August
JF  - The Eurasia Proceedings of Science Technology Engineering and Mathematics
JO  - EPSTEM
PB  - ISRES Publishing
WT  - DergiPark
SN  - 2602-3199
SP  - 361
EP  - 367
IS  - 2
LA  - en
AB  - Weirs arebarriers placed across a river and designed to control the flowing water inorder to prevent floods, make waterways operable for inland navigation andmeasure flow discharge. Although there are many types of weirs, mainly usedones are sharp-crested, circular-crested (cylindrical), broad crested and ogeeweirs. In the present study, triangular broad-crested weirs are numericallyinvestigated under different flow conditions. Different interior angles of 90o,100o, 110o and 120o are included for theopening of weirs. The flowing water over weirs is simulated using CFDtechniques and evaluated at different flow regimes with inlet discharges of0.012 m3 s-1, 0.036 m3 s-1and 0.06m3 s-1. The simulation results have shown that the waterlevel upstream the weir is inversely proportional to the opening angle, wherean increment of 10o in the opening angle leads to a drop in waterlevel about 1.5 cm. In addition, applying a discharge of 0.012 m3 s-1,an uncovered region with water is created downstream the triangular broad-crestedweirs, while the bed downstream of the rectangular broad-crested weir iscovered with a thin layer of water at the same flow discharge. Theaforementioned results are compared with a comparative data and show goodagreement. By using triangular broad-crested weirs, it is important to measurethe wake region and the hitting point of falling water downstream the weirswhere this area must be strengthened well in order to resist water power andreduce the risk of drift.
KW  - Weir
KW  - CFD
KW  - V-notch
KW  - Broad-Crested weir
KW  - Turbulence model
CR  - Afshar H. & Hooman H., (2013). Experimental and 3-D numerical simulation of flow over a rectangular broad-crested weir. International Journal of Engineering and Advanced Technology, 2, 6, pp. 214-219.
Almohammadi, K., Ingham, D., Ma, L. & Pourkashan, M. (2013). Computational Fluid Dynamics (CFD) Mesh Independency Techniques for a Straight Blade Vertical Axis Wind Turbine. Energy, 58, 483–493.
ANSYS user's guide
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UR  - https://dergipark.org.tr/en/pub/epstem/issue//455968
L1  - https://dergipark.org.tr/en/download/article-file/528353
ER  -