A two dimensional numerical model for simulation of the dispersion of pollutants in Shatt al-Hilla

Abstract EN

A two-dimensional numerical model was developed and applied to study the unsteady continuous discharge of pollutant from a single source into the river with considering the effect of the turbulent eddy viscosity resulted from density difference between the pollutant and river water.

This model can be applied for soluble as well as for miscible pollutant with density equals or slightly greater than river water density.

The governing equations in the present model are momentum and mass fraction conservation equations.

The turbulent dynamic viscosity and diffusion coefficients were calculated by using (k -ε) turbulence model.

The partial differential equations were converted into finite difference form by using (ADI) finite difference technique with application the up winding scheme.

Then the set of the linear algebraic equations were solved by Gauss-Seidel Point-by-Point Method.

The results of the system were verified by using a numerical model presented by (Petrus, 1990) for simulating pollutant dispersion in Tigress river.

The verification showed a good agreement between the present and the previous work.

A sensitivity analysis was carried out to study the effect of variations of different parameters on the concentration distribution resulting from the application of the model.