A 2D numerical model for the transport of pollutants. The influence of Boundary Conditions

Abstract

[Abstract] The pollutants transport phenomena in a 2D unsteady free surface flow has been studied. The weighted residual method has been used for the integration of the transport equations, appying the Galerkin formulation for the spatial integration and a differentiation scheme for the time integration. The variation of the dispersion coefficient with the direction has been taken into account by the use of a dispersion tensor. The code allows to impose Dirichlet, neumann, Mixed and Open boundary condition types. Several solutions have been carried out for a numerical test with know analytical solution so as to validate the numerical model and to check the behaviour of open boundary condition type.