Browse > Article
http://dx.doi.org/10.3741/JKWRA.2021.54.11.1011

Numerical simulation of submerged jump and washed-out jump using the k-𝜔 SST model  

Choi, Seongwook (Department of Civil and Environmental Engineering, Yonsei University)
Choi, Sung-Uk (Department of Civil and Environmental Engineering, Yonsei University)
Publication Information
Journal of Korea Water Resources Association / v.54, no.11, 2021 , pp. 1011-1019 More about this Journal
Abstract
This study presents numerical simulations of submerged jump and washed-out jump resulted from the flow over the embankment type weir. Unsteady Reynolds Averaged Navier-Stokes (URANS) equations are solved with the k-𝜔 SST turbulence model. Validations are carried out using the experimental results in the literature, revealing that computed roller shape, free surface, and mean velocity are in good agreement with measured data. The volume fractions of water of the submerged jump and washed-out jump are compared, and the characteristics of the two flows from the double-averaged volume fractions of water are presented. The condition under which the transition occurs from the submerged jump to washed-out jump is presented by the relation between the relative embankment length and submergence factor via numerical simulations by changing the weir length, discharge, and tailwater depth.
Keywords
Submerged jump; Washed-out jump; Mean flow; Turbulence statistics; Transition;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Kindsvater, C.E. (1964). Discharge characteristics of embankment-shaped weirs. Geological Survey Water-Supply Paper, No. 1617, US Government Printing Office, Washington, D.C., U.S.
2 Menter, F.R. (1992). Improved two-equation k-omega turbulence models for aerodynamic flows. NASA Ames Research Center, Moffett Field, CA, U.S.
3 Ohtsu, I., and Yasuda, Y. (1991). "Hydraulic jump in sloping channels." Journal of Hydraulic Engineering, Vol. 117, No. 7, pp. 905-921.   DOI
4 Paik, J., and Lee, N.J. (2015). "Numerical modeling of free surface flow over a broad-crested rectangular weir." Journal of Korea Water Resources Association, Vol. 48, No. 4, pp. 281-290.   DOI
5 Wu, S., and Rajaratnam, N. (1996). "Submerged flow regimes of rectangular sharp-crested weir." Journal of Hydraulic Engineering, Vol. 122, No. 7, pp. 412-414.   DOI
6 Wu, S., and Rajaratnam, N. (1998). "Impinging jet and surface flow regimes at drop." Journal of Hydraulic Research, Vol. 36, No. 1, pp. 69-74.   DOI
7 Jasak, H. (2009). "OpenFOAM: Open source CFD in research and industry." International Journal of Naval Architecture and Ocean Engineering, Vol. 1, No. 2, pp, 88-94.
8 Fritz, H.M., and Hager, W.H. (1998). "Hydraulics of embankment weirs." Journal of Hydraulic Engineering, Vol. 124, No. 9, pp. 963-971.   DOI
9 Menter, F.R., and Esch, T. (2001). "Elements of industrial heat transfer predictions." 16th Brazilian Congress of Mechanical Engineering, Uberlandia, Brazil, Vol. 109, p. 650.
10 Van Leer, B. (1974). "Towards the ultimate conservative difference scheme. II. Monotonicity and conservation combined in a second-order scheme." Journal of Computational Physics, Vol. 14, No. 4, pp. 361-370.   DOI
11 Hager, W.H. (1988). "B-jump in sloping channel." Journal of Hydraulic Research, Vol. 26, No. 5, pp. 539-558.   DOI
12 Kim, S. (2020). Operation and management methods for improving the flow safety of Singok-submerged weir. Seoul Institute of Technology.
13 Azimi, A.H., Rajaratnam, N., and Zhu, D.Z. (2016). "Water surface characteristics of submerged rectangular sharp-crested weirs." Journal of Hydraulic Engineering, Vol. 142, No. 5, 06016001.   DOI
14 Hirt, C.W., and Nichols, B.D. (1981). "Volume of fluid (VOF) method for the dynamics of free boundaries." Journal of Computational Physics, Vol. 39, No. 1, pp. 201-225.   DOI
15 Gunal, M., and Narayanan, R. (1996). "Hydraulic jump in sloping channels." Journal of Hydraulic Engineering, Vol. 122, No. 8, pp. 436-442.   DOI