Study of the Secondary Flow Formed on Two-Channel Junction Using Computational Fluid Dynamics
Abstract
Information about the secondary flow formed at the junction is crucial for identifying areas vulnerable to erosion. This study aims to build a water flow simulation at a two-channel junction with varying angles using Computational Fluid Dynamics (CFD). The goal of the simulation is to analyze the velocity changes on each variation of angles (90°, 70°, 50°, 30°, and 10°) on the two-channel junction. The validation of these flow patterns is significantly connected to the reference data. The secondary flow is formed as the impact of the velocity changes, and the main channel flow meets the branch channel flow. The flow patterns at the 90° junction exhibit similar formation, as evidenced by secondary zones formed around the junction, such as the contraction and separation zones. The contraction zone forms in areas near junctions with high-velocity values, while the separation zone develops in areas where velocity decreases due to the impact of two flows. This study found that CFD effectively analyses velocity changes on two-channel junctions.
##Keywords:##
CFD, OpenFOAM, RANS k-Omega, Secondary flow, Two-channel junction
Published
Nov 30, 2024
How to Cite
PRATIWI, Tasya Mahardika et al.
Study of the Secondary Flow Formed on Two-Channel Junction Using Computational Fluid Dynamics.
Journal of Ocean, Mechanical and Aerospace -science and engineering-, [S.l.], v. 68, n. 3, p. 106-117, nov. 2024.
ISSN 2527-6085.
Available at: <https://isomase.org/Journals/index.php/jomase/article/view/372>. Date accessed: 19 mar. 2025.
doi: http://dx.doi.org/10.36842/jomase.v68i3.372.
References
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[3] Bilal, A., Xie, Q. & Zhai, Y. (2020). Flow, sediment, and morpho-dynamics of river confluence in tidal and non-tidal environments. Journal of Marine Science and Engineering, 8(8), 591.
[4] Shakibainia, A., Tabatabai, M.R.M. & Zarrati, A.R. (2010). Three-dimensional numerical study of flow structure in channel confluences. Canadian Journal of Civil Engineering, 37(5), 772-781.
[5] Putra, Y.S., Noviani, E., Kurnia, E. & Christy, M.C.P. (2024). Numerical analysis of sedimentation in open channels using computational fluid dynamics. Journal of Ocean, Mechanical and Aerospace, 66(2), 53-63.
[6] Nazari-Giglou, A., Jabbari-Sahebari, A., Shakibaeinia, A. & Borghei, S.M. (2016). An experimental study of sediment transport in channel confluences. International Journal of Sediment Research, 31(1), 87-96.
[7] Shumate, E.D. (1998). Experimental Description of Flow at an Open Channel Junction; University of Iowa: Iowa City, IA, USA.
[8] Yang, Q.Y., Liu, T.H., Lu, W.Z. & Wang, X.K. (2013). Numerical simulation of confluence flow in open channel with dynamic meshes techniques. Advances in Mechanical Engineering, 5, 860431.
[9] Birjukova, O., Ludena, S., Alegria, F. & Cardoso, A. (2014). Three-dimensional flow field at confluent fixed-bed open channels. River Flow 2014- Schleiss et al. (Eds), 1007-1014.
[10] Versteeg, H.K. & Malalasekera, W. (2007). An Introduction to Computational Fluid Dynamics: The Finite Volume Method, Pearson Education Limited.
[11] Mahananda, M. & Hanmaiahgari, P. R. (2018). Effect of aspect ratio on higher order moments of velocity fluctuations in hydraulically rough open channel flow. In E3S Web of Conferences (Vol. 40, p. 05045). EDP Sciences.
[12] Akbari, M. & Vaghefi, M. (2017). Experimental investigation on streamlines in a 180º sharp bend. Acta Scientiarum. Technology, 39(4), 425-432.
[13] Shaheed, R., Mohammadian, A. & Yan, X. (2021). A review of numerical simulations of secondary flows in river bends. Water, 13(7), 884.
[14] Shaheed, R., Yan, X. & Mohammadian, A. (2021). Review and comparison of numerical simulations of secondary flow in river confluences. Water, 13(14), 1917.
[15] Binesh, N. & Bonakdari, H. (2014). Longitudinal velocity distribution in compound open channels: comparison of different mathematical models. International Research Journal Application Basic Science, 8, 1149-1157.
[16] Russell, P. & Vennell, R. (2019). High resolution observations of an outer-bank cell of secondary circulation in a natural river bend. Journal of Hydraulic Engineering, 145(5), 04019012.
[17] Shaheed, R., Mohammadian, A. & Kheirkhah Gildeh, H. (2019). A comparison of standard k–? and realizable k–? turbulence models in curved and confluent channels. Environmental Fluid Mechanics, 19, 543-568.
[18] Kheirkhah Gildeh, H., Mohammadian, A., Nistor, I. & Qiblawey, H. (2015). Numerical modeling of 300 and 450 inclined dense turbulent jets in stationary ambient. Environmental Fluid Mechanics, 15, 537-562.
[19] Talebpour, M. (2016). Numerical Investigation of Turbulent-Driven Secondary Flow. M.Sc. thesis, Pennsylvania State Univ.
[20] Gholami, A., Akhtari, A.A., Minatour, Y., Bonakdari, H. & Javadi, A.A. (2014). Experimental and numerical study on velocity fields and water surface profile in a strongly-curved 900 open channel bend. Engineering Applied Computing Fluid Mechanic 8, 447-461.
[21] Ludeña S. G. (2015). Hydro-Morphodynamics of Open-Channel Confluences with Low Discharge Ratio and Dominant Tributary Sediment Supply. PhD thesis, Department of Civil Engineering, Architecture, and Georesources, University of Lisbon, Portugal.
[22] Riesterer, J., Wenka, T., Brudy-Zippelius, T. & Nestmann, F. (2016). Bed load transport modeling of a secondary flow influenced curved channel with 2D and 3D numerical models. Journal of Applied Water Engineering and Research, 4(1), 54-66.
[23] Holzinger, G. (2015). OpenFOAM a little user-manual. CD-Laboratory-Particulate Flow Modelling, Johannes Keplper University: Linz, Austria.
[24] Vanoni, V. A. (1941). Velocity distribution in open channels. California Institute of Technology, Reprinted from: Civil Engineering:ASCE 11(6), 356-357.
[25] Biron, P., Best, J. L., & Roy, A. G. (1996). Effects of bed discordance on flow dynamics at open channel confluences. Journal of Hydraulic Engineering, 122(12), 676-682.
