Abstract
The authors measured and computed the hydrodynamics and passive scalar dispersion in 90-degree open channel confluences over flat and degraded beds with a dominant upstream or tributary inflow. The present discussion essentially deals with the direction of rotation of the secondary currents, reported for the flat bed configuration with dominant tributary inflow. This rotation direction is indeed surprisingly opposite to the ones reported in the literature, both from calculations and measurements, even if present geometry slightly differs from literature geometries.
Similar content being viewed by others
References
Best J (1985) Flow dynamics and sediment transport at river channel confluences. Ph.D. thesis, University of London, London
Chen X, Zhu DZ, Steffler PM (2017) Secondary currents induced mixing at channel confluences. Can J Civ Eng 44(12):1071–1083
Huang J, Weber LJ, Lai YG (2002) Three-dimensional numerical study of flows in open-channel junctions. J Hydraul Eng 128(3):268–280
Riviere N, Wei C, Lipeme-Kouyi G, Mignot E (2015) Mixing downstream a 90° open-channel junction. In: 36th IAHR World Congress, 28 June–3 July, 2015, The Hague
Schindfessel L, Creëlle S, De Mulder T (2015) Flow patterns in an open channel confluence with increasingly dominant tributary inflow. Water 7(9):4724–4751
Shakibainia A, Tabatabai MRM, Zarrati AR (2010) Three-dimensional numerical study of flow structure in channel confluences. Can J Civ Eng 37(5):772–781
Shumate E (1998) Experimental description of flow at an open-channel junction. M.S. thesis, University of Iowa, Iowa City
Tang H, Zhang H, Yuan S (2018) Hydrodynamics and contaminant transport on a degraded bed at a 90-degree channel confluence. Environ Fluid Mech 18(2):443–463
Weber LJ, Schumate ED, Mawer N (2001) Experiments on flow at a 90° open-channel junction. J Hydraul Eng 127(5):340–350
Yang QY, Liu TH, Lu WZ, Wang XK (2013) Numerical simulation of confluence flow in open channel with dynamic meshes techniques. Adv Mech Eng 5:860431
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Pouchoulin, S., Ramos, P.X., Mignot, E. et al. Discussion of “Tang, H., Zhang, H., & Yuan, S. (2018). Hydrodynamics and contaminant transport on a degraded bed at a 90-degree channel confluence. Environmental Fluid Mechanics, 18(2), 443–463”. Environ Fluid Mech 18, 1293–1295 (2018). https://doi.org/10.1007/s10652-018-9612-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10652-018-9612-x