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http://dx.doi.org/10.3741/JKWRA.2019.52.2.115

Measurements of turbulent flows downstream of a spur dike at different Froude numbers  

Lee, Jiyong (Department of Civil and Environmental Engineering, Hanyang University)
Kim, Yeongkyu (Department of Civil and Environmental Engineering, Hanyang University)
Cha, Jun-Ho (Han River Flood Control Office, Ministry of Environment)
Kang, Seokkoo (Department of Civil and Environmental Engineering, Hanyang University)
Publication Information
Journal of Korea Water Resources Association / v.52, no.2, 2019 , pp. 115-123 More about this Journal
Abstract
The effects of the Froude numbers on turbulent flow patterns downstream of a non-submerged spur dike were investigated in a laboratory flume. Three-dimensional velocities and water depths were measured using Acoustic Doppler Velocimetry and distance sensors under three Froude number conditions ($Fr_d=0.31$, 0.38, and 0.46). The results show that there are marginal differences in the velocity fields downstream of a spur dike due to the change of the Froude number. However, an increase of the Froude number was found to reduce cross-sectional area in the flow and to increase the strength of the jet-like flow. The jet-like flow was observed to displace the location of the maximum turbulence kinetic energy within a cross section toward the inner bank in the transverse direction.
Keywords
Spur dike; Open channel; Three-dimensional flow; Recirculation flow; ADV;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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1 Dey, S., and Barbhuiya, A. K. (2006). "Velocity and turbulence in a scour hole at a vertical-wall abutment." Flow Measurement and Instrumentation, Vol. 17, No. 1, pp. 13-21.   DOI
2 Duan, J. G. (2009). "Mean flow and turbulence around a laboratory spur dike." Journal of Hydraulic Engineering, Vol. 135, No. 10, pp. 803-811.   DOI
3 Duan, J. G., He, L., Fu, X., and Wang, Q. (2009). "Mean flow and turbulence around experimental spur dike." Advances in Water Resources, Vol. 32, No. 12, pp. 1717-1725.   DOI
4 Jeon, J. S., and Kang, S. K. (2016). "Flume experiments for turbulent flow around a spur dike" Journal of Korea Water Resources Association, Vol. 49, No. 8, pp. 707-717.   DOI
5 Jeon, J. S., Lee, J. Y., and Kang, S. K. (2018). "Experimental investigation of three-dimensional flow structure and turbulent flow mechanisms around a nonsubmerged spur dike with a low length-to-depth ratio." Water Resources Research, Vol. 54, No. 5, pp. 3530-3556.   DOI
6 Kuhnel, R. A., Alonso, C. V., and Shields, F. D. (1999). "Geometry of scour holes associated with 90 degree spur dike." Journal of Hydraulic Engineering, Vol. 125, No. 9, pp. 972-978.   DOI
7 Kang, J. G., Yeo, H. K., and Kim, S. J. (2005). "An experimental study on tip velocity and downstream recirculation zone of single groyne conditions." Journal of Korea Water Resources Association, Vol. 38, No. 2, pp. 143-153.   DOI
8 Koken, M., and Constantinescu, G. (2008). "An investigation of the flow and scour mechanisms around isolated spur dikes in a shallow open channel: 1. Conditions corresponding to the initiation of the erosion and deposition process." Water Resources Research, Vol. 44, No. 8, pp. 1-19.
9 Kang, J. G., Kim, S. J., and Yeo, H. K. (2009). "An experimental study on flow characteristic around inclined crest groyne." Journal of Korea Water Resources Association, Vol. 42, No. 9, pp. 715-724.   DOI
10 Kim, S. J., Kang, J. G., and Yeo, H. K. (2014). "An experimental study on flow characteristics for optimal spacing suggestion of $45^{\circ}$ upward groynes." Journal of Korea Water Resources Association, Vol. 47, No. 5, pp. 459-468.   DOI
11 Kara, S., Kara, M. C., Stoesser, T., and Sturm, T. W. (2015). "Freesurface versus rigid-lid LES computations for bridge-abutment flow." Journal of Hydraulic Engineering, Vol. 141, No. 9, 04015019, pp. 1-9.
12 Khosronejad, A., Ghazian Arabi, M., Angelidis, D., Bagherizadeh, E., Flora, K., and Farhadzadeh, A. (2018). "Comparative hydrodynamic study of rigid-lid and level-set methods for LES of openchannel flow." Journal of Hydraulic Engineering, Vol. 145, No. 1, 04018077, pp. 1-15.
13 Lee, J. Y., Jeon, J. S., Kim, Y. K., and Kang, S. K. (2018). "Flume experiments for studying the effects of submerged-conditions on three-dimensional flow structure around a spur dike." Journal of Korea Water Resources Association, Vol. 51, No. 2, pp. 109-120.   DOI
14 Paik, J., and Sotiropoulos, F. (2005). "Coherent structure dynamics upstream of a long rectangular block at the side of a large aspect ratio channel." Physics of fluids, Vol. 17, No. 11, pp. 1-14 (115104).   DOI
15 Rajaratnam, N., and Nwachukwu, B.A. (1983). "Flow near groinlike structures." Journal of Hydraulic Engineering, Vol. 109, No. 3, pp. 463-480.   DOI
16 Rajaratnam, N., and Nwachukwu, B.A. (1983). "Erosion near groin-like structures." Journal of Hydraulic Engineering, Vol. 21, No. 4, pp. 277-287.
17 Safarzadeh, A., Salehi Neyshabouri, S. A. A., and Zarrati, A. R. (2016). "Experimental investigation on 3D turbulent flow around straight and T-shaped groynes in a flat bed channel." Journal of Hydraulic Engineering, Vol. 142 No. 8, pp. 1-15 (04016021).
18 Yeo, H. K., Roh, Y. S., Kang, J. G., and Kim, S. J. (2006). "Variations of flow thalweg alignment and separation region around a groyne." Journal of Korea Water Resources Association, Vol. 39, No. 4, pp. 313-320.   DOI