MODELING OF THE HYDRAULIC PERFORMANCE OF OGEE SPILLWAY USING COMPUTATIONAL FLUID DYNAMICS (CFD)

  • JOWHAR R. MOHAMMED College of Engineering; University of Duhok, Kurdistan Region-Iraq
  • BAHZAD M. A. NOORI Dept. of Civil Engineering, University of Duhok, Kurdistan Region-Iraq
  • IHSAN A. HUSSEIN Water Resources Engineering, Private Sector, Kurdistan Region-Iraq
Keywords: Ogee Spillway, Modeling, CFD, Surface Profiles, Pressure Measurements

Abstract

Computational fluid dynamics (CFD) is a type of numerical modeling that is used to solve problems involving fluid flow. Since CFD can provide faster and more economical solution than physical modeling, hydraulic engineers are interested in verifying the capability of CFD software. This study has examined the ability of the commercial CFD software (Flow-3D) to model an ogee-crested spillway by making data comparisons to physical models (experimental data). Three spillway models of different heights (20cm, 25cm, and 30cm) were fabricated and tested for design heads of (5cm, 7cm, 10cm), respectively. The study was conducted to compare flow parameters over a standard ogee-crested spillway using physical and numerical models. The physical models were fabricated from a rigid foam and placed in a test flume. Pressure taps were installed along the entire length of the spillways. Water surface profiles and pressure data were recorded for five different flow conditions (1.2Hd, 1Hd, 0.75Hd, 0.5Hd, and 0.25Hd). The results of this study showed that there were good agreements between the results of physical and numerical models for water surface profiles and there were some discrepancies in pressure results.

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References

 Bhajantri, M.R., Eldho, T.I. and Deolalikar, P.B. (2006). “Hydrodynamic Modeling of Flow over a Spillway Using a Two Dimensional Finite Volume Based Numerical Model”, Sadhana, PP. 743-754
 Chatila, J. and Tabbara, M. (2004), “Computational Modeling of Flow over an Ogee Spillway”, Computers and Structures; Vol 82; PP. 1805–1812.
 Gessler, D. (2005). “CFD Modeling of Spillway Performance”, EWRI 2005: Impacts of Global Climate Change, Proceedings of the World Water and Environmental Resources Congress, Anchorage, Alaska. 15-19 May. Edited by R. Walton. American Society of Civil Engineers.
 Guo, Y., Wen, X., Wu, C. and Fang, D. (1998). “Numerical Modeling of Spillway Flow with Free Drop and Initially Unknown Discharge”, Journal of Hydraulic Research, Vol.36, No. 5 PP.785-801.
 Harlow, F.H., and Welsh, J.E. (1965). “Numerical Calculation of Time-dependent Viscous Incompressible Flow of Fluid with Free Surface”, Phy. Fluids, Vol. 8; PP. 2182-2189.
 Ho, D. and Donohoo, S. (2001).”Investigation of Spillway Behavior under Increased Maximum Flood by Computational Fluid Dynamics Technique”, Proceeding of 14th Australasian Fluid Mechanics Conference, Adelaide University, Adelaide, Australia, PP. 10-14.
 Ho, D., Boyes, K., Donohoo, S. and Cooper, B. (2003). “Numerical Flow Analysis for Spillways”, 43rd ANCOLD Conference, Hobart, Tasmania, October 24-29.
 Ho, D., Cooper, B., Riddette, K. and Donohoo, S. (2006). “Application of Numerical Modeling to Spillways in Australia”, Dams and Reservoirs, Societies and Environment in the 21st Century, Edited by Berga et al., Taylor and Francis Group, London.
 Irzooki, R. H., Mohammed, J. R. and Ameen, A. S. (2016). “Computational Fluid Dynamics Modeling of Flow over Stepped Spillways”, Tikrit Journal of Engineering Sciences, Vol. 23, No. 3, PP. 1-11.
 Johnson, M., and Savage, B. (2006). “Physical and Numerical Comparison of Flow over Ogee Spillway in the Presence of Tail Water”, Journal of Hydraulic Engineering, Vol. 132, No.12, ASCE, PP.1353–1357.
 Khatsuria, R. M. (2005). “Hydraulics of Spillways and Energy Dissipaters”, Mercel Dekker, NY, USA
 Kim, S. D, Lee, H.J. and An, S.D. (2010) “Improvement of Hydraulic Stability for Spillway Using CFD Model”, International Journal of the Physical Sciences Vol. 5, No.6, PP. 774-780.
 Kjellesvig, H.M. (1996). “Numerical Modeling of Flow over a Spillway.” Hydro informatics ’96, Balkema, Rotterdam.
 Launder, B.E., Morse, A., Rodi, W., Spalding D.B. (1972). “A Comparison of Performance of Six Turbulence Models”, NASA Conf. on Free Shear Flows, Nat. Aeronautics Space Admin., Washington D.
 Olsen, N.R.B., Kjellesvig, H.M. (1998). “Three-Dimensional Numerical Flow Modeling for Estimation of Spillway Capacity”, Journal of Hydraulic Resarch, Vol. 36, No.5, PP. 775-784.
 Savage, B., and Johnson, M. (2001), “Flow over Ogee Spillway: Physical and Numerical Model Case Study”, Journal of Hydraulic Engineering, ASCE, Vol. 127, No.8, PP. 640-649.
 Song, C.C.S. and Zhou, F. (1999).”Simulation of Free Surface Flow over Spillway”, Journal of Hydraulic Engineering, ASCE, Vol.125, No.9, PP.959-967.
 United States Army Corps of Engineers Waterways Experiment Station (USACE-WES) (1952). Corps of Engineers Hydraulic Design Criteria, Revised in Subsequent years.
Published
2017-07-29
How to Cite
MOHAMMED, J. R., NOORI, B. M. A., & HUSSEIN, I. A. (2017). MODELING OF THE HYDRAULIC PERFORMANCE OF OGEE SPILLWAY USING COMPUTATIONAL FLUID DYNAMICS (CFD). Journal of Duhok University, 20(1), 638-653. https://doi.org/10.26682/sjuod.2017.20.1.56