Numerical Study of Sedimentation and Flow Pattern at the Open Channel Intake
DOI:
https://doi.org/10.31185/ejuow.Vol10.Iss3.279Keywords:
Lateral intake, Separation zone, Fluent, Sedimentation.Abstract
Generally, open channel lateral intake structures are extensively used in the water and environmental projects. The passing flow at side intakes is mostly turbulence containing vertical and horizontal spiral currents causing sediment problems. The flow separation region in the intake channel is critical for sediment and water distribution during the diversion. It denotes a large reduction in the possible breadth of the lateral branch's incoming flow, as well as a place where sediment has collected, obstructing the deviated flow.
This study aims to reduce and control sediment problems at the lateral intake by improving the flow pattern at this area using three-dimensional numerical models simulated in CFD, ANSYS Fluent software. The correctness of the three-dimensional numerical model was validated by a previous experimental study that showed good accuracy. Different discharge ratios and a range of shape designs were used to simulate the flow pattern at the intake channel junction. The findings demonstrated that the separation zone measurements minimize as the discharge ratio increases. Based on the changing the intake entrance shape results, cutting the outer boundary of the canal entrance widens the separation area, as well as an additional separation spot as the cutting size grows. In contrast with the internal chamfered angle models of the intake inlet, the separation area dimensions are reduced. The chamfered and rounded inner intake edge model with 30o angle to the main channel flow direction and the length of the chamfered side that normal to the flow direction (c value ) equal to three-quarters of the intake width was noticed to be the best design for lessening separation extent in this study. Thereby, the reduction ratio of the separation area width and length reaches in this case to 90% and 72%, respectively.
References
Goudarzizadeh, R., Hedayat, N., & Jahromi, S. M. (2010). Three-dimensional simulation of flow pattern at the lateral intake in straight path, using finite-volume method. World Academy of Science, Engineering and Technology, 47, 656-661.
Firozjaei, M. R., Neyshabouri, S. S., Sola, S. A., & Mohajeri, S. H. (2019). Numerical simulation on the performance improvement of a lateral intake using submerged vanes. Iranian Journal of Science and Technology, Transactions of Civil Engineering, 43(2), 167-177. DOI: https://doi.org/10.1007/s40996-018-0126-z
Shamloo, H., & Pirzadeh, B. (2008). Investigation of characteristics of separation zones in T-junctions. WSEAS transactions on Mathematics, 7(5), 303-312.
Mohammadiun, S., Neyshabouri, S. S., Naser, G., & Vahabi, H. (2016). Numerical investigation of submerged vane effects on flow pattern in a 90 junction of straight and bend open channels. Iranian Journal of Science and Technology, Transactions of Civil Engineering, 40(4), 349-365. DOI: https://doi.org/10.1007/s40996-016-0039-7
Bowles, C. (1999). An investigation into the flow structure of a generalised open channel intake. Nottingham Trent University (United Kingdom).
Marra, W. A., Parsons, D. R., Kleinhans, M. G., Keevil, G. M., & Thomas, R. E. (2014). Near‐bed and surface flow division patterns in experimental river bifurcations. Water Resources Research, 50(2), 1506-1530. DOI: https://doi.org/10.1002/2013WR014215
Dutta, S., Fischer, P., & Garcia, M. H. (2016). Large eddy simulation (LES) of flow and bedload transport at an idealized 90-degree diversion: Insight into Bulle effect. River Flow 2016: Iowa City, USA, July 11-14, 2016, 101. DOI: https://doi.org/10.1201/9781315644479-20
Ramamurthy, A. S., Qu, J., & Vo, D. (2007). Numerical and experimental study of dividing open-channel flows. Journal of Hydraulic Engineering, 133(10), 1135-1144. DOI: https://doi.org/10.1061/(ASCE)0733-9429(2007)133:10(1135)
Neary, V. S., Sotiropoulos, F., & Odgaard, A. J. (1999). Three-dimensional numerical model of lateral-intake inflows. Journal of Hydraulic Engineering, 125(2), 126-140. DOI: https://doi.org/10.1061/(ASCE)0733-9429(1999)125:2(126)
Bulle, H. 1926. Untersuchungen uber die Geschiebeableitung bei der Spaltung von Wasserlaufen. VDI Verlag, Berlin (in German).
Herrero, A., Bateman, A., & Medina, V. (2015). Water flow and sediment transport in a 90 channel diversion: an experimental study. Journal of Hydraulic Research, 53(2), 253-263. DOI: https://doi.org/10.1080/00221686.2014.989457
Odgaard, A. J. (2009). River training and sediment management with submerged vanes. Virginia, US: ASCE Press. DOI: https://doi.org/10.1061/9780784409817
Odgaard, A. J., & Wang, Y. (1991). Sediment management with submerged vanes. I: Theory. Journal of Hydraulic Engineering, 117, 267–283. DOI: https://doi.org/10.1061/(ASCE)0733-9429(1991)117:3(267)
Odgaard, A. J., & Wang, Y. (1991). Sediment management with submerged vanes. II: Applications. Journal of Hydraulic Engineering, 117, 284–302. DOI: https://doi.org/10.1061/(ASCE)0733-9429(1991)117:3(284)
Barkdoll, B. D., Hagen, B. L., & Odgaard, A. J. (1998). Experimental comparison of dividing open-channel with duct flow in T-junction. Journal of Hydraulic Engineering, 124(1), 92-95
Omidbeigi, M. A., Ayyoubzadeh, S. A., & Safarzadeh, A. (2009, August). Experimental and numerical investigations of velocity field and bed shear stresses in a channel with lateral intake. In 33rd IAHR Congress, Vancouver, Canada (pp. 1284-1291).
Fan, Y. A. N. G. (2008). Study on diversion angle effect on lateral intake flow [J]. Journal of China Institute of Water Resources and Hydropower Research, 1.
Karami Moghadam, M., Amini, A., & Keshavarzi, A. (2020). Intake design attributes and submerged vanes effects on sedimentation and shear stress. Water and Environment Journal, 34(3), 374-380. DOI: https://doi.org/10.1111/wej.12471
Helal, Esam E. Y., (2006). "Improving the Flow Characteristics at Open Channel's Junctions", Ph.D. Thesis, Dept. of Civil Engineering, El-Minufiya University, Egypt.
Rezapour, S., Moghadam, K. F., & Omid Naceni, S. T. (2009, August). Experimental study of flow and sedimentation at 90◦ open channel diversion. In Proceedings of the 33rd IAHR Congress, Vancouver, BC, Canada (pp. 9-14).
Ramamurthy, A. S., Minh Tran, D., & Carballada, L. B. (1990). Dividing flow in open channels. Journal of Hydraulic Engineering, 116(3), 449-455.Ramamurthy, A. S., Minh Tran, D., & Carballada, L. B. (1990). Dividing flow in open channels. Journal of Hydraulic Engineering, 116(3), 449-455. DOI: https://doi.org/10.1061/(ASCE)0733-9429(1990)116:3(449)
Lama, S. K., Kuroki, M., & Hasegawa, K. (2002). Study of flow bifurcation at tic 30° open channel junction when the width ratio of branch channel to main channel is large. PROCEEDINGS OF HYDRAULIC ENGINEERING, 46, 583-588. DOI: https://doi.org/10.2208/prohe.46.583
Schiano, P. (1996). CS Ierotheoul, CR Forsey’, MLeatham', U Block. Parallel Computational Fluid Dynamics' 96: Algorithms and Results Using Advanced Computers, 197.
Fluent, U. S. G. (2003). Fluent inc. Chapter, 6, 14-6.
Omidbeigi, M. A., Ayyoubzadeh, S. A., & Safarzadeh Gendeshmin, A. (2012). Experimental and numerical study of three dimensional flow structure at lateral intake. Modares Civil Engineering journal, 12(1), 0-0.
Ozen, M., & Fellow, A. S. M. E. (2014, November). Meshing workshop. In MESHING WORKSHOP (p. 25).
Noor, M. M., Wandel, A. P., & Yusaf, T. (2013, July). Detail guide for CFD on the simulation of biogas combustion in bluff-body mild burner. In Proceedings of the 2nd International Conference of Mechanical Engineering Research (ICMER 2013) (pp. 1-25). Universiti Malaysia Pahang.
Airfoil, N. (2010). ANSYS FLUENT.
ANSYS, A. L. D. (2017). user guide, ANSYS. Inc. version, 15.
Taylor, E., “Flow characteristics at rectangular open channel junction,” Journal of Hydraulic Engineering, ASCE, 10 (6).893- 902. Jun. 1944. DOI: https://doi.org/10.1061/TACEAT.0005772
Barkdoll, B. D., Hagen, B. L., & Odgaard, A. J. (1998). Experimental comparison of dividing open-channel with duct flow in T-junction. Journal of Hydraulic Engineering, 124(1), 92-95 DOI: https://doi.org/10.1061/(ASCE)0733-9429(1998)124:1(92)
Karami, H., Farzin, S., Sadrabadi, M. T., & Moazeni, H. (2017). Simulation of flow pattern at rectangular lateral intake with different dike and submerged vane scenarios. Water Science and Engineering, 10(3), 246-255. DOI: https://doi.org/10.1016/j.wse.2017.10.001
Habibi, H., Masjedi, A., Pourmohammadi, M. H., Kamanbedast, A. A., & Bordbar, A. (2017). Reduction of sediment transport due to flood and runoff to a lateral intake in the river bend using submerged vane. FEB-Fresenius Environmental Bulletin, 6996.
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