Journal
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
Volume 49, Issue 3, Pages 267-299Publisher
WILEY
DOI: 10.1002/fld.992
Keywords
solute transport; convection; diffusion; shallow water flow; source terms; coupled system; finite volumes; two-dimensional model; conservation
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A two-dimensional model for the simulation of solute transport by convection and diffusion into shallow water flow over variable bottom is presented. It is based on a finite volume method over triangular unstructured grids. A first order upwind technique is applied to solve the flux terms in both the flow and solute equations and the bed slope source terms and a centred discretization is applied to the diffusion and friction terms. The convenience of considering the fully coupled system of equations is indicated and the methodology is well explained. Three options are suggested and compared in order to deal with the diffusion terms. Some comparisons are carried out in order to show the performance in terms of accuracy and computational effort of the different options. Copyright (c) 2005 John Wiley & Sons, Ltd.
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