Numerical Modelling of Flow in Morning Glory Spillways Using FLOW-3D

Amir Reza Razavi, Hassan Ahmadi


Suspended load amount with flow is one of the factors which are disregarded in designing morning glory spillways. It is due to the fact that physical modeling of sediment load with flood flow is very difficult and costly. Suspended sediments load with flow can change the density of passing water, leading to changing most of assumptions existing in spillways' design. With its unique potential to model dense flows and flows contain suspended loads, numerical model of FLOW-3D can provide valuable information in this regard. In the present study, flow was calibrated and validated using FLOW-3D through physical model. Then, by adding suspended load to flow, the values of discharge passing through the morning glory spillway were determined. In this regard, applying suspended load (3000, 6000, 9000, and 12000 ppm), flow discharge values were investigated for various heads over the spillway. The research findings revealed that increasing suspended flow load leads to decreasing values of flow passing through the morning glory spillways; such that, deceased values strongly depend on suspended load.


Suspended Load; Flow Discharge; Morning Glory; Numerical Modeling; FLOW-3D.


Kavan, Jan, Jakub Ondruch, Daniel Nývlt, Filip Hrbáček, Jonathan L. Carrivick, and Kamil Láska. "Seasonal hydrological and suspended sediment transport dynamics in proglacial streams, James Ross Island, Antarctica." Geografiska Annaler: Series A, Physical Geography 99, no. 1 (2017): 38-55.

Ervine, D. A., and A. A. Ahmed. "A Scaling relationship for a two-dimensional vertical dropshaft." In Proc. Intl. Conf. on Hydraulic Modelling of Civil Engineering Structures, pp. 195-214. 1982.

Zhao, Can-Hua, David Z. Zhu, Shuang-Ke Sun, and Zhi-Ping Liu. "Experimental study of flow in a vortex drop shaft." Journal of Hydraulic Engineering 132, no. 1 (2006): 61-68.

Emamgheis, Reza Jamali, and Ebrahim Nohani. "Review of the efficiency of shaft spillway discharge influenced by sharp triangular vortex breaker blades with rectangular body." Advances in Environmental Biology (2014): 285-290.

Shemshi, Roya, and Abdorreza Kabiri-Samani. "Swirling flow at vertical shaft spillways with circular piano-key inlets." Journal of Hydraulic Research 55, no. 2 (2017): 248-258.

Coleman, H. Wayne, C. Y. Wei, and James E. Lindell. "Hydraulic design of spillways." Hydraulic design handbook (2004): 17-41.

Xianqi, Zhang. "Hydraulic characteristics of rotational flow shaft spillway for high dams." International Journal of Heat and Technology 33, no. 1 (2015): 167-174.

Petaccia, G., and A. Fenocchi. "Experimental assessment of the stage–discharge relationship of the Heyn siphons of Bric Zerbino dam." Flow Measurement and Instrumentation 41 (2015): 36-40.

Houichi L, Ibrahim G, Achour B. Experiments for the discharge capacity of the siphon spillway having the Creager Ofitserov profile. Int J Fluid Mech Res 2006; 33(5):395–406.

Houichi L, Ibrahim G, Achour B. Experimental comparative study of siphon spillway and overflow spillway. Cour Savoir 2009; 9:95–100.

Gramatky, Ferdinand Gunner, and Kenneth Hall Robinson. "Siphon spillway." PhD diss., California Institute of Technology, 1929.

Nohani, Ebrahim. "An experimental study on the effect of vortex breakers thickness on discharge efficiency for the shaft spillways." Science International 27, no. 3 (2015).

Hirt, C. W., and B. Nichols. "Flow-3D User’s Manual." Flow Science Inc (1988).

Lenzi, Mario A., and Lorenzo Marchi. "Suspended sediment load during floods in a small stream of the Dolomites (northeastern Italy)." Catena 39, no. 4 (2000): 267-282.

Fokema, M. D., S. M. Kresta, and P. E. Wood. "Importance of using the correct impeller boundary conditions for CFD simulations of stirred tanks." The Canadian Journal of Chemical Engineering 72, no. 2 (1994): 177-183.

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DOI: 10.28991/cej-030928


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