Author(s): Kazuyuki Ota; Takahiro Sato
Linked Author(s):
Keywords: Bed load; Vane; Numerical simulation; Local scour; OpenFOAM
Abstract: Submerged vane is used in preventing excessive bed-sediment ingestion into lateral diversions of flow from alluvial channels. This study presents three-dimensional sediment transport simulation at lateral diversion with or without submerged vane. The hybrid RANS-LES approach is used in hydrodynamic model to reasonably resolve coherent turbulence structure around the diversion entrance. The Lagrangian approach is used to compute the nonequilibrium bed load transport. Simulation showed that submerged vanes decrease in bed load ingestion into the diversion. Influence of the coherent turbulence structure is revealed by simulation. The result also implies that the present numerical simulation becomes a power tool to examine the vane effect.
Year: 2020