NUMERICAL MODELING OF SOLUTE TRANSPORT IN COMPOUND CHANNEL FLOWS

A 3-D numerical model has been developed to investigate transport proc esses of solute in a compound open channel. The Navier-Stokes equation s have been numerically solved in conjunction with the linear and nonl inear kappa-epsilon models to predict flow fields and turbulent parame ters. The predicted velocity field and eddy viscosity are then used fo r solving the solute transport equation to predict solute transport ra tes. The hydrodynamic and solute transport models have been applied to the experimental studies undertaken by Wood and Liang (1989) and the results obtained from both the linear and non-linear kappa-epsilon mod els are compared with their results. This comparison clearly shows the influence of the secondary currents upon the mixing processes.