Three-dimensional numerical analysis of sediment transport around abutments in channel bend

In this paper, the results for sediment transport simulation around bridge abutments in a channel bend are presented. Computational Fluid Dynamics code FANS3D is used to conduct the study, which solves three-dimensional Reynolds Averaged Navier-Stokes equations with the finite analytic scheme. The two-layer turbulence model, which combines the one- and two-equation eddy-viscosity models, is utilized to resolve turbulence near smooth solid surfaces. The wallfunction approach is adopted to take into account the roughness effects in case of sediment beds. For velocity-pressure coupling, PISO/SIMPLER algorithms are used. Chimera technique is utilized to embed non-matching blocks in the computational domain. The numerical model coupled with the sediment transport module was validated with experimental studies. For the present case, the transport of suspended sediment in a 90-channel bend with abutments located in the middle was simulated. Sediment plume in a swirl was observed downstream of the abutments.

Three-dimensional numerical analysis of sediment transport around abutments in channel bend Conference Paper