Three-dimensional numerical modeling of score hole in rectangular side weir with finite volume method

Document Type : Research Paper

Authors

Department of Civil Engineering , Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran.

Abstract

Local scouring in the downstream of hydraulic structures is one of the important issues in river and hydraulic engineering, which involves a lot of costs every year, so the prediction of the rate of scour is important in hydraulic design. Side weirs are the most important of hydraulic structures that are used in passing flow. This study investigate the scouring due to falling jet from side weir in downstream in side channel numerically. The simulation was done with finite volume method. The comparison of numerical and experimental results of flow fields shows agreement. Results show that from upstream to downstream of side weir located in side channel, scoring is increased and the dimensions of the scour hole in the downstream of the rectangular side weirs increase along it. In fact, at the downstream of the lower edge of side weirs in side channel, scouring has the greatest dimensions; in particular the depth.

Keywords

References

  1. Swamee PK, Pathak SK, Ali MS, (1994). Side-weir analysis using elementary discharge coefficient. Irrigation and drainage engineering, pp: 120(4):742-55.
  2. Singh R, Manivannan D, Satyanarayana T, (1994). Discharge coefficient of rectangular side weirs. Irrigation and Drainage Engineering, pp: 120(4):814-9.
  3. Borghei SM, Jalili MR, Ghodsian MA, (1999). Discharge coefficient for sharp-crested side weir in subcritical flow. Hydraulic Engineering, pp: 125(10):1051-6.
  4. Ghodsian M, (2003). Supercritical flow over a rectangular side weir. Canadian Journal of Civil Engineering, pp: 30(3):596-600.
  5. Cheong HF, (1991). Discharge coefficient of lateral diversion from trapezoidal channel. Irrigation and Drainage Engineering, pp: 117(4):461-75.
  6. Emiroglu ME, Kaya N, Agaccioglu H, (2009). Discharge capacity of labyrinth side weir located on a straight channel. Irrigation and drainage engineering, pp: 136(1):37-46.
  7. Kaya N, Emiroglu ME, Agaccioglu H, (2011). Discharge coefficient of a semi-elliptical side weir in subcritical flow. Flow Measurement and Instrumentation, pp: 22(1):25-32.
  8. Michelazzo G, Minatti L, Paris E, Solari L, (2016). Side Weir Flow on a Movable Bed. Hydraulic Engineering, pp: 142(6):04016007.
  9. Hoffmans G. J. C. M, Pilarczyk K. W, (1995). Local scour downstream of hydraulic structures. Hydra. Eng, pp: 121(4): 326-340.
  10. Farhoudi J, Smith K. V. H, (1985). Local scour profiles downstream of hydraulic jump. Hydra. Res, pp: 23(4): 343-358.
  11. Balachandar R, Kells J. A, Thiessen R. J, (2000). The effect of tailwater depth on the dynamics of local scour. Can. J. Civ. Eng, pp: 27, 138-150.
  12. Kells J. A, Balachandar R, Hagel K. P, (2001). Effect of grain size on local channel scour below a sluice gate. Can. J. Civ. Eng, pp: 28, 440-451.
  13. Kurniawan, A., Altinakar, M. S. Graf, W. H. (2001). Flow pattern of an eroding jet. Proceedings of XXIX IAHR Congress, Beijing, China.
  14. Jo J. S, (2017). Numerical Simulation of Scour Depth in Open Channels of Tideland Dike. American Journal of Naval Architecture and Marine Engineering, pp: 9(4):91-98.
  15. Burkow M, Griebel M, (2015). A full three dimensional numerical simulation of the sediment transport and the scouring at a rectangular obstacle. Preprint submitted to Elsevier.
  16. Török G. T, Baranya S, Rüther N, (2017). 3D CFD Modeling of Local Scouring, Bed Armoring and Sediment Deposition. Water, pp: 9(1):56.
  17. Martins RB, (1975). Scouring of Rocky River beds by free jet spillways. Int. Water Power Dam Constr, pp: 27(4):152-3.
  18. Rajaratnam N, Mazurek K, (2003). Erosion of sand by circular impinging water jets with small tailwater. Hydraulic Engineering, ASCE, pp: 129(3):225-229
  19. Veronese A., Erosion of a bed downstream from an outlet, Colorado A & M College, Fort Collins, United States, 1937.
  20. Mason PJ, Arumugam K, (1985). Free jet scour below dams and flip buckets. Hydraulic Engineering, pp: 111(2):220-35.
  21. Brethour J, Burnham J, (2010). Modeling sediment erosion and deposition with the FLOW-3D sedimentation & scour model. Flow Science Technical Note, FSI-10-TN85, pp: 1-22.
  22. Bagheri S, Heidarpour M, (2011). Characteristics of flow over rectangular sharp-crested side weirs. Irrigation and Drainage Engineering, pp: 138(6):541-7.
Journal of Hydraulic Structures
Volume 3, Issue 2 - Serial Number 6
December 2017
Pages 22-31

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