USE OF PHYSICAL MODELS FOR VALIDATING AN EULER/ EULER APPROACH FOR SEDIMENT TRANSPORT PROCESSES

摘要

This paper deals with the sedimentation and transport processes taking place in a rectangular horizontal channel in the laboratory. These model tests have served as a basis for the numerical simulation of sedimentation processes and the various factors involved. An Euler/Euler model for the numerical simulation of sedimentation effects and sediment transport is presented. The model solves the transient Navier-Stokes equations with the k-ε turbulence model. The main advantage of the model is its validity in regions of high and low sediment concentration. Bed changes are accounted for directly without any adaption of the computational grid. The effects of deposition and reentrainment of particles are investigated in a laboratory flume. The results from the numerical model are in good accordance with those coming from the physical model tests.