Flow simulation over semicircular labyrinth weir using ANSYS -fluent

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Jehan M. Fattah Sheikh Suleimany
Tara H. Aurahman
Bruska S. Mamand


This study investigates the flow of a semicircular labyrinth weir in an open channel by experimental and numerical methods. The experiments were carried out in a channel with a length of 3.5m and width of 0.25m and 0.3m height under five different flow rates. Five different discharge values over the weir were used. In each experiment, flow rate and flow depth were measured. Numerical processes solved using mathematical equations of fluid flow through the computational fluid dynamics using ANSYS FLUENT code. The Volume of Fluid (VOF) model is designed for the case of water and air-immiscible faces. Standard k-epsilon turbulence models were tested. A mass balance result indicates that the maximum error between the inlet and outlet discharges of the main channel does not exceed 12% for discharge values of 4.31 L/sec.  The results indicate that by increasing the discharge flow rate, the percentage of error decreased to 0.4% for discharge, 14.6 L/sec. The findings show that the free water surface profile obtained from the numerical model compared to experimental values complies well with the experimental results.

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Carrillo, J. M., Matos, J., & Lopes, R. (2020). Numerical modeling of subcritical flow downstream of a labyrinth weir. 8th IAHR ISHS. DOI: https://doi.org/10.14264/uql.2020.616

Crookston, B. M., & Tullis, B. P. (2013). Hydraulic design and analysis of labyrinth weirs. I: Discharge relationships. Journal of Irrigation and Drainage Engineering, 139(5), 363-370. DOI: https://doi.org/10.1061/(ASCE)IR.1943-4774.0000558

Desai, R., & Patil, L. (2015). Performance Comparison of Various Labyrinth Side Weirs'. International Journal of Application or Innovation in Engineering & Management (IJAIEM), 4(6), 68-73.

Ehsanifar, A., & Ghodsian, M. (2020). Experimental and Numerical Study of Piano Key Weir with Upstream Nose and Semicircular Crest at the Outlet. Journal of Hydraulics, 15(2), 31.

Fluent, A. N. S. Y. S. (2011). ANSYS fluent user's guide, release 14.0. PA: ANSYS Fluent.

Gabriel, J. D., & John, A. S. (1985). ANSYS Engineering Analysis System User’s Manual.

Jiang, L., Diao, M., Sun, H., & Ren, Y. (2018). Numerical modeling of flow over a rectangular broad-crested weir with a sloped upstream face. Water, 10(11), 1663. DOI: https://doi.org/10.3390/w10111663

Korkmaz, S., & Ghaznawi, N. A. (2019). Numerical and Experimental Modeling of Flow Over a Broad-Crested Weir. Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 23(2), 252-258. DOI: https://doi.org/10.16984/saufenbilder.423705

Khalili, M., & Honar, T. (2017). Discharge coefficient of semi-circular labyrinth side weir in subcritical flow. Water SA, 43(3), 433-441. DOI: https://doi.org/10.4314/wsa.v43i3.08

Mohammed, O.K., 2010. Flow Characteristics through Pipe Culvert Combined with Broad Crested Weir (MSc Thesis, College of Engineering Salahaddin University- Erbil).

Noori, B. M. A. (2020). Hydraulic performance of circular crested oblique weirs. Ain Shams Engineering Journal, 11(4), 875-888. DOI: https://doi.org/10.1016/j.asej.2020.02.014

Nguyen, C. (2005). Turbulence modeling. MIT, 1(8), 1-6.

Subramanya, K. (2009). Flow in open channels. Tata McGraw-Hill Education.

Safarrazavi Zadeh, M., Esmaeili Varaki, M., & Biabani, R. (2021). Experimental study on flow over sinusoidal and semicircular labyrinth weirs. ISH Journal of Hydraulic Engineering, 27(sup1), 304-313. DOI: https://doi.org/10.1080/09715010.2019.1644679

Shaghaghian, M., & Sharifi, M. (2015). Numerical modeling of sharp-crested triangular plan form weirs using FLUENT. Indian Journal of Science and Technology, 8(34), 1-7. DOI: https://doi.org/10.17485/ijst/2015/v8i34/78200

Yuce, M. I., Al-Babely, A. A., & Al-Dabbagh, M.A. (2015). Flow simulation over oblique cylindrical weirs. Canadian Journal of Civil Engineering, 42(6), 389-407. DOI: https://doi.org/10.1139/cjce-2014-0157

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