Evaluation of Flow behavior over Broad-Crested Weirs of a Triangular Cross-Section using CFD Techniques

Mohammad A. AL-DABBAGH; Sulaiman D. AL-ZUBAIDY

Article Details

Evaluation of Flow behavior over Broad-Crested Weirs of a Triangular Cross-Section using CFD Techniques

Authors:

Mohammad A. AL-DABBAGH | Sulaiman D. AL-ZUBAIDY

Main Topics:

Applied physics

Journal:

The Eurasia Proceedings of Science Technology Engineering and Mathematics 2018 Issue 2, pp.361-367

Document Type:

Article

Publication Date:

8/2018

Document Language:

English

Document ID (Org No.):

2000661263

Abstract:

 


Weirs are
barriers placed across a river and designed to control the flowing water in
order to prevent floods, make waterways operable for inland navigation and
measure flow discharge. Although there are many types of weirs, mainly used
ones are sharp-crested, circular-crested (cylindrical), broad crested and ogee
weirs. In the present study, triangular broad-crested weirs are numerically
investigated under different flow conditions. Different interior angles of 90o,
100o, 110o and 120o are included for the
opening of weirs. The flowing water over weirs is simulated using CFD
techniques and evaluated at different flow regimes with inlet discharges of
0.012 m3 s-1, 0.036 m3 s-1and 0.06
m3 s-1. The simulation results have shown that the water
level upstream the weir is inversely proportional to the opening angle, where
an increment of 10o in the opening angle leads to a drop in water
level 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-crested
weirs, while the bed downstream of the rectangular broad-crested weir is
covered with a thin layer of water at the same flow discharge. The
aforementioned results are compared with a comparative data and show good
agreement. By using triangular broad-crested weirs, it is important to measure
the wake region and the hitting point of falling water downstream the weirs
where this area must be strengthened well in order to resist water power and
reduce the risk of drift.

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Article Details

Evaluation of Flow behavior over Broad-Crested Weirs of a Triangular Cross-Section using CFD Techniques

Authors: Mohammad A. AL-DABBAGH | Sulaiman D. AL-ZUBAIDY

Main Topics: Applied physics

Journal: The Eurasia Proceedings of Science Technology Engineering and Mathematics 2018 Issue 2, pp.361-367

Document Type: Article

Publication Date: 8/2018

Document Language: English

Document ID (Org No.): 2000661263

Issues

Authors:

Mohammad A. AL-DABBAGH | Sulaiman D. AL-ZUBAIDY

Main Topics:

Applied physics

Journal:

The Eurasia Proceedings of Science Technology Engineering and Mathematics 2018 Issue 2, pp.361-367

Document Type:

Article

Publication Date:

8/2018

Document Language:

English

Document ID (Org No.):

2000661263