CFD Modeling of Simultaneous Flow Over Broad Crested Weir and Through Pipe Culvert using Different Turbulence Models

Main Article Content

Othman K. Mohammed
Yaseen W. Aziz


Broad Crested Weir CFD Modeling Simultaneous Flow Turbulence Models ANSYS CFX


Culverts and broad crested weirs are hydraulic structures that could be used for measuring the flow rate in open channels. In this research, a simultaneous flow over broad crested weir and through pipe culvert was simulated using the numerical software ANSYS CFX. The different turbulence models were used for the modeling of flow turbulent. To achieve the purposes of this research, results of simulations have been compared with data gathered from lab experiments. The computational results showed a close agreement with experimental data obtained from the literature. Also, results indicated that (RNG) k – ε model has the maximum accuracy in comparison with other turbulence models used in this study.

Abstract 43 | PDF Downloads 14


Afshar, H. and Hoseini, H. "Experimental and 3D Numerical Simulation of Flow over a Rectangular Broad-Crested Weir". International Journal of Engineering and Advanced Technology (IJEAT) August 2013, Volume-2, Issue-6, 214-219.
Al-Hashimi A. S., Madhloom M. H., and Nahi N. T. "Experimental and Numerical Simulation of Flow Over Broad Crested Weir and Stepped Weir using Different Turbulence Models", Journal of Engineering and Sustainable Development Vol. 21, No. 02, March 2017.
Aziz, Y. W. "Evaluation of Hydraulic Performance of Nazanin Dam Side Channel Spillway" MSc Thesis, College of Engineering Salahaddin University Erbil 2016.
Choudhury D., (1993). "Introduction to the Renormalization Group Method and Turbulence Modeling", Fluent Inc. Technical Memorandum TM-107.
Duangrudee and Kositgittiwong "Validation of Numerical Model of the Flow Behavior through Smooth and Stepped Spillways using Large-scale Physical Model" PhD Thesis, Faculty of Engineering, King Mongkut’s University of Technology Thonburi 2012.
Duru, Aysel "Numerical Modelling of Contracted Sharp Crested Weirs" MSc Thesis, School of Natural and Applied Sciences of Middle East Technical University, 2014
Hager W. H. and Schwalt M. "Broad-crested weir", Journal of Irrigation and Drainage Engineering, Vol. 120, No. 1, (1994), pp.13-26.
Hargreaves D. M., Morvan H. P. and Wright N. G. "Validation of the Volume of Fluid Method for Free Surface Calculation: The Broad-Crested Weir", Engineering Applications of Computational Fluid Mechanics Vol. 1, No. 2, pp. 136–146 (2007)
Hoseini, S.H. "3D Simulation of Flow over a Triangular Broad-Crested Weir", Journal of River Engineering, 2(2), 1-7 (2014).
Jalil, Shaker & Qasim, Jihan. (2016). “Numerical Modelling of Flow over Single-Step Broad- Crested Weir Using FLOW-3D and HEC-RAS”. Polytechnic General Sciences Journal/ Erbil Polytechnic University. 6. 435-448.
Launder, B. E., and Spalding, D. B. “The numerical computation of turbulent flows.” computer methods in applied mechanics and engineering 3 (1974) 269-289.
Mahmoud S. M. "Characteristics and Prediction of Simultaneous Flow Over Broad-Crested Weirs and Through Culverts", EJEST, Vol, 6, No.1, January 2002
Menter FR (1994). "Two-equation eddy viscosity turbulence models for engineering applications". AIAA Journal 32(8):1598-1605.
Negm A. M. “Analysis and modeling of simultaneous flow through box culverts and over contracted broad-crested weirs” Proc. of 5th International Conference on Hydro-science and Engineering. ICHE2002. Sept. 18- 21. Warsaw, Poland.
Othman K. Mohammed "Flow Characteristics through Pipe Culvert Combined with Broad Crested Weir" MSc Thesis, College of Engineering Salahaddin University Erbil 2010.
S. Hoseini, S. Jahromi, M. Vahid “Determination of Discharge Coefficient of Rectangular Broad-Crested Side Weir in Trapezoidal Channel by CFD” IJHE 2013, 2(4): 64-70
Sarker, M.A and Rhodes, D.G," Calculation of free surface profile over a rectangular broad-crested weir". Flow Measurement and Instrumentation, 2004, 15(4) 215-219.
Versteeg H. K. and Malalasekera W. "An Introduction to Computational Fluid Dynamics" Second Edition, Pearson Education Limited 2007, pp 14, 66.
Wilcox D. C., "Turbulence Modeling for CFD", DCW Industries Inc., La Canada,