CFD MODELING OF MEANDERING RIVER EVOLUTION

摘要

Water and sediment flow in an alluvial channel was modeled using a CFD program. The simulation was started from an initially straight grid, without any perturbation at the inflow boundary. The model computed the river bed evolution leading to a meandering river system. The results were compared to observations from a physical model study. The results of the simulation showed that the predicted meander evolution was in fairly good agreement with the measured values. The model reproduced the flow pattern in meandering river systems in detail, showing the secondary currents and their impact on the interaction between sedimentation and erosion of the banks.