Numerical Simulation of Flow Behavior in an Open Channel Incoperating A Series of Groins

Suman Jyoti; Monir Hossain; Sumon Babu; Bishnu Prasad Bhandari; Md. Ibrahim

doi:10.18535/ijsrm/v12i12.m02

Abstract

Rivers in Nepal, India and Bangladesh exhibit significant instability due to their loose banks, gentle slopes at both the riverbed and water surface, and irregular sedimentation patterns resulting from substantial sediment loads originating upstream. To mitigate the impact of this instability, groins are constructed along the riverbanks to redirect the flow of water away from areas at risk. However, in numerous instances, traditional groins have proven ineffective. It is essential to conduct comprehensive studies on the performance of groins with various configurations to protect riverbanks from erosion, enhance navigation, and promote the biodiversity of aquatic species. The primary aim of this research is to simulate flow in an open channel using a series of groin models through the application of the 2D numerical model, iRIC Nays2DH. This numerical simulation employs the K-ε model for turbulence and the Cubic Interpolation Pseudo-particle (CIP) method for handling advective terms. Simulation of flow fields due to interaction of series of impermeable, permeable and combined groins placed in a straight channel has been made. A given flow condition is applied for all the groins. The simulation results depict that combined groins in series influence favorable flow fields compared to impermeable and fully permeable groins. This causes water zone near bank at the downstream of impermeable part, then slow flow through the permeable part. No strong circulation of flow at groin field and strong current after the groin head is present.

Keywords

MitigateEnhanceErosionInfluenceEnvironment RightiRIC Nays2DH

References

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[refR-1] 1 Alauddin, M., Hossain, M., Uddin, M., Haque, M., 2017. A review on hydraulic and morphological characteristics in river channels due to spurs. International Journal of Geological and Environmental Engineering 11, 397–404.Google Scholar ↗

[refR-2] 2 Ali, T., Alauddin, M., Alam, J., Hossain, S., Hossain, M., n.d. Effect of Minor Groin on the Downstream Groin Area.Google Scholar ↗

[refR-3] 3 Azevedo, L.G.T. de, Gates, T.K., Fontane, D.G., Labadie, J.W., Porto, R.L., 2000. Integration of water quantity and quality in strategic river basin planning. Journal of water resources planning and management 126, 85–97.Google Scholar ↗

[refR-4] 4 Cui, Z., Zhang, X., 2006. Flow and sediment simulation around spur dike with free surface using 3-D turbulent model. Journal of Hydrodynamics 18, 232–239.Google Scholar ↗

[refR-5] 5 Francis, R.C., 1983. Experiential effects on agonistic behavior in the paradise fish, Macropodus opercularis. Behaviour 292–313.Google Scholar ↗

[refR-6] 6 Haque, M., 2018. Simulation of Flow and Sediment Transport in an Open Channel with Obstacle Using IRIC NAYS2DH.Google Scholar ↗

[refR-7] 7 Maleki, F., Abbasi, S., 2023. Influence of permeable groins with radial arrangement on local scour around groins: an experimental study. International Journal of River Basin Management 21, 409–420.Google Scholar ↗

[refR-8] 8 Niroshinie, M., Ono, N., Shimizu, Y., Egami, K., 2022. Flow Analysis for Navigation Safety by Using iRIC Model Nays2DH, in: Smart Rivers. Springer, pp. 857–867.Google Scholar ↗

[refR-9] 9 Pourshahbaz, H., Abbasi, S., Pandey, M., Pu, J.H., Taghvaei, P., Tofangdar, N., 2022. Morphology and hydrodynamics numerical simulation around groynes. ISH Journal of Hydraulic Engineering 28, 53–61.Google Scholar ↗

[refR-10] 10 Quanhong, L., Pengzhi, L., 2007. Numerical simulation of recirculating flow near a groyne. Presented at the Proceedings of the The 2nd International Conference on Marine Research and Transportation, pp. 61–68.Google Scholar ↗

[refR-11] 11 Rajaratnam, N., Nwachukwu, B.A., 1983. Flow near groin-like structures. Journal of Hydraulic Engineering 109, 463–480.Google Scholar ↗

[refR-12] 12 Sarveram, H., Shamsai, A., Banihashemi, M.A., 2012. Two-dimensional simulation of flow pattern around a groyne using semi-implicit semi-Lagrangian method. International Journal of Physical Sciences 7, 2775–2783.Google Scholar ↗

[refR-13] 13 Shokrian Hajibehzad, M., Shafai Bejestan, M., Ferro, V., 2020. Investigating the performance of enhanced permeable groins in series. Water 12, 3531.Google Scholar ↗

[refR-14] 14 Tang, X., Ding, X., Chen, Z., 2007. Experimental and numerical investigations on secondary flows and sedimentations behind a spur dike. Journal of Hydrodynamics 19, 23–29.Google Scholar ↗