Studying the effect of shape changes in plan of labyrinth weir on increasing flow discharge coefficient using Flow-3D numerical model

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Zamiri E.; KARAMI H.; FARZIN S.

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Journal: Journal of Irrigation Sciences and Engineering Year:2020 | Volume:43 | Issue:1 Page(s): 101-116

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Information Journal Paper

Title

Studying the effect of shape changes in plan of labyrinth weir on increasing flow discharge coefficient using Flow-3D numerical model

Author(s)

Zamiri E. | KARAMI H. | FARZIN S. | Issue Writer Certificate

Keywords

Flood controlQ1

Sidewall angleQ1

Predicting discharge coefficientQ1

Computational hydraulicQ1

Numerical modelingQ1

Abstract

Weirs are hydraulic structures used to measure, regulate and control the water levels and are fixed upon open channels and rivers width. Growing magnitude of probable maximum flood events (PMF) has highlighted the demand for increasing discharge capacity. Application of labyrinth weir has been suggested as a solution for increasing discharge capacity. Tullis et al. (1995) evaluated the effective parameters in determining the capacity of a labyrinth weir. They introduced total head, the effective crest length and the discharge coefficient as parameters influencing the discharge capacity of a labyrinth weir. Khode et al. (2011) experimentally studied the parameters of a flow-over labyrinth weir for different side wall angles (α ) from 8 to 30° . They found that discharge coefficient increases by growing side wall angle values. Crookston and Tullis (2012a) studied performance of different labyrinth weirs by making differences between geometric shapes of weirs in plan. The results indicated that discharge capacity of the arced labyrinth weirs is more than the discharge capacity of horseshoe weirs. Seo et al. (2016) investigated the effect of weir shapes on discharge of weirs. It was shown that the discharge of the labyrinth weir had an increase of approximately 71% in comparison with the linear ogee weir. In this research, labyrinth weir with Sidewall angle equal to 6° was simulated through Flow-3D model, using experimental results of previous researchers. After validation, the changes of discharge coefficient of weir with angles of 45° and 85° and apex shapes of triangular and halfcircular shapes were analyzed.

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APA: Copy

Zamiri, E., KARAMI, H., & FARZIN, S.. (2020). Studying the effect of shape changes in plan of labyrinth weir on increasing flow discharge coefficient using Flow-3D numerical model. IRRIGATION SCIENCES AND ENGINEERING (JISE) (SCIENTIFIC JOURNAL OF AGRICULTURE), 43(1 ), 101-116. SID. https://sid.ir/paper/399294/en

Vancouver: Copy

Zamiri E., KARAMI H., FARZIN S.. Studying the effect of shape changes in plan of labyrinth weir on increasing flow discharge coefficient using Flow-3D numerical model. IRRIGATION SCIENCES AND ENGINEERING (JISE) (SCIENTIFIC JOURNAL OF AGRICULTURE)[Internet]. 2020;43(1 ):101-116. Available from: https://sid.ir/paper/399294/en

IEEE: Copy

E. Zamiri, H. KARAMI, and S. FARZIN, “Studying the effect of shape changes in plan of labyrinth weir on increasing flow discharge coefficient using Flow-3D numerical model,” IRRIGATION SCIENCES AND ENGINEERING (JISE) (SCIENTIFIC JOURNAL OF AGRICULTURE), vol. 43, no. 1 , pp. 101–116, 2020, [Online]. Available: https://sid.ir/paper/399294/en

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