THREE-DIMENSIONAL NUMERICAL SIMULATION OF PARTICLE CLOUDS FOR OPEN WATER SEDIMENT DISPOSAL

摘要

A three-dimensional numerical model for simulating the motion of particle clouds for an open water sediment disposal was developed. The model is based on Large Eddy Simulation (LES) and assumes that the discrete particles can be represented by a continuous field of density difference and Boussinesq approximations. A sensitivity analysis on the model constants, namely Smagorinsky constant and Schmidt number, was performed, and suitable values of these were estimated. Then the model was tested against reported experimental data of two-dimensional (2D) as well as axisymmetric particle clouds. Furthermore, the model was applied to a prototype scale situation to investigate the effects of the ratio of initial length to initial width of suspension and the ambient depth on the subsequent behavior of the cloud.