Two-dimensional simulation of pollutant dispersion at the confluence of Diyala river with Tigris river using CFD technique
Keywords:
Water dispersion, BOD, Tigris river, Diyala river, CFDAbstract
The main aim of this paper is to simulate the pollutant dispersion behavior from Diyala River as a tributary on the Tigris River using a two-dimensional numerical model. Numerical computations were achieved using computational fluid dynamic (CFD) code, which is based on the finite volume approach. Biochemical oxygen demand (BOD) was selected as a pollutant for the simulation process as it is a very important water quality parameter in rivers and streams. It is presumed that BOD is mixed throughout the system as a passive scalar. Furthermore, the volume of fluid (VOF) and user-defined scalar (UDS) methods were used in this study. VOF method was used to allow the free surface to deform freely with the underlying turbulence. The numerical simulation results show a good fit with observed data. The findings of this study may provide a proper basis for water quality management in rivers.
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