Numerical Investigation of Inverse Curvature Ogee Spillway

Rasoul Daneshfaraz, Amir Ghaderi


Design of water structures and their segments including spillways play an important role in water resources management and agricultural activities. In the the linear body part of an ogee spillway, for speeding up the flow rate, the flow should be transferred to the stilling basin by inverse curve so that the water energy can be reduced. This study aims to evaluate the effect of the inverse profile curvature on the pressure of spillway surface using Fluent software. For this purpose, five different curvatures of inverse profile were considered to be equal to no-curvature (zero), 1, 1.5, 2 and 2.5 of the spillway design head. The results indicated that by increasing the curvature radius, the maximum pressure dramatically reduced. And for this purpose, some relationships were given to predict the pressure reduction. Pressure increment in zero curvature is caused by sudden collision of flow lines and turbulence caused by it. By increase in inverse profile curvature, the turbulence is created in flow lines and the maximum pressure shows a lower value than before.  In general, there was little change in the average absolute pressure.


Numerical Modeling; Ogee Spillway; Pressure Profile; Inverse Curvature.


Chanson, Hubert."The Hydraulics of Open Channel Flow An Introduction". Elsevier Butterworth Heinemann, (2004): pp 496.

Bradley, Joseph N."Studies of flow characteristics, discharge and pressures relative to submerged dams". Hydraulic Laboratory Rep. No. 182, (1945).

Cassidy, John J."Irrotational flow over spillways of finite height". Journal of Hydraulic Engineering 91, no. 6 (1965): 155-173.

Maynord, Stephen T."General spillway investigation". Tech. Rep. HL-85-1, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Miss, (1985).

Savage, Bruce M., and Michael C. Johnson."Flow over ogee spillway physical and numerical model case study". Journal of Hydraulic Engineering, ASCE 127, no. 8 (2001): 640-649. DOI: 10.1061/(ASCE)0733-9429(2001)127:8(640).

Chunrong, Liu, Huhe Aode, and Ma Wenju."Numerical and experimental investigation of flow over a semicircular weir". Acta Mech Sinica 18, no.6 (2002): 594-602. DOI: 10.1007/BF02487961.

Chatila, Jean, and Mazen Tabbara."Computational modeling of flow over an ogee spillway". Computers and Structures 82, no.22 (2004): 1805–1812. DOI: 10.1016/j.compstruc.2004.04.007.

Michael C. Johnson and Savage, Bruce M. “Physical and Numerical Comparison of Flow Over Ogee Spillway in the Presence of Tail water”. Journal of Hydraulic Engineering 132, no. 12 (2006). DOI: 10.1061/(ASCE)0733-9429(2006)132:12(1353).

Tullis, Blake P." Behavior of Submerged Ogee Crest Weir Discharge Coefficients". Journal of Irrigation and Drainage Engineering 137, no. 10 (2010): 677-681. DOI: 10.1061/(ASCE)IR.1943-4774.0000330.

Vosoughifar, Hamidreza, and Alireza Daneshkhah."CFD and dimensionless parameter analysis of Froude number to determine the flow regime over ogee spillways". Journal of Water Sciences Research 2, no. 1 (2010): 21-29.

Morales, Viviana, Talia E. Tokyay, and Marcelo Garcia. "Numerical Modeling of Ogee Crest Spillway and Tainter Gate Structure of a Diversion Dam on Canar River". Ecuador, XIX International Conference on Water Resources, (2012).

Alhashimi Drsam."CFD Modeling of Flow over Ogee Spillway by Using Different Turbulence Models". International Journal of Scientific Engineering and Technology Research 2, no. 15 (2013): 1682-168.

Daneshfaraz Rasoul, Kaya Birol, Sadeghfam Sina and Sadeghi Hojat. "Simulation of Flow over Ogee and Stepped Spillways and Comparison of Finite Volume and Finite Element Methods". Journal of Water Resource and Hydraulic Engineering 3, no. 2 (2014): 37-47.

Herrera-Granados, Oscar, and Stanisław W. Kostecki."Numerical and physical modeling of water flow over the ogee weir of the new Niedów barrage". Journal of Hydraulic and Hydromechanic 64, no. 1 (2016): 67–74. DOI: 10.1515/johh-2016-0013.

Daneshfaraz, Rasoul, Ali Rezazadeh Joudi, Ali Ghahramanzadeh, and Amir Ghaderi "Investigation of flow pressure distribution over a stepped spillway,"Advances and Applications in Fluid Mechanics 19, no.4 (2016): pp.811–822. DOI: 10.17654/FM019040805.

Patankar, Suhas."Numerical Heat Transfer and Fluid Flow". Hemisphere Publishing Corporation, Taylor & Francis Group, New York, (2012) pp. 11-23.

Dargahi, Bijan. "Experimental study and 3D numerical simulations for a free-overflow spillway." Journal of Hydraulic Engineering 132, no. 9 (2006): 899-907. DOI: 10.1061/(ASCE)0733-9429(2006)132:9(899).

Kim, Dae Geun, and Jae Hyun Park. "Analysis of flow structure over ogee-spillway in consideration of scale and roughness effects by using CFD model". KSCE Journal of Civil Engineering 9, no. 2 (2005): 161-169 .DOI: 10.1007/BF02829067.

Dehdar-Behbahani, Sadegh, and Abbas Parsaie. "Numerical modeling of flow pattern in dam spillway’s guide wall. Case study: Balaroud dam, Iran." Alexandria Engineering Journal 55, no. 1 (2016): 467-473. DOI:10.1016/j.aej.2016.01.006.

Mansoori, Abbas, Shadi Erfanian, and Farhad Khamchin Moghadam. "A Study of the Conditions of Energy Dissipation in Stepped Spillways with Λ-shaped step Using FLOW-3D." Civil Engineering Journal 3, no. 10 (2017): 856-867. DOI: 10.28991/cej-030920.

Yakhot V, Orsarg SA, Thangam S, Gatski TB, Speziale CG. "Development of turbulence models for shear flows by a double expansion technique." Physics of Fluids4, no. 7 (1992): 1510-1520. DOI: 10.1063/1.858424.

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DOI: 10.28991/cej-030944


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