Analysis of Nonlinear Dispersion of a Pollutant Ejected by an External Source into a Channel Flow

Chinyoka, T; Makinde, O D

Analysis of Nonlinear Dispersion of a Pollutant Ejected by an External Source into a Channel Flow

Journal Article

2010

Journal Title

Mathematical Problems in Engineering

Link to Journal

https://dx.doi.org/10.1155/2010/827363

Department

Centre for Research in Computational and Applied Mechanics (CERECAM)

Faculty

Faculty of Engineering and the Built Environment

Abstract

This paper focuses on the transient analysis of nonlinear dispersion of a pollutant ejected by an external source into a laminar flow of an incompressible fluid in a channel. The influence of density variation with pollutant concentration is approximated according to the Boussinesq approximation, and the nonlinear governing equations of momentum and pollutant concentration are obtained. The problem is solved numerically using a semi-implicit finite difference method. Solutions are presented in graphical form and given in terms of fluid velocity, pollutant concentration, skin friction, and wall mass transfer rate for various parametric values. The model can be a useful tool for understanding the polluting situations of an improper discharge incident and evaluating the effects of decontaminating measures for the water body.