keywords: Contaminated soils, COMSOL multiphysics, crude oil, numerical simulation
The contaminant transport has been a major issue due to the adverse effect of the contaminants on groundwater quality. Effect and movement of the contaminant in soils and groundwater is essential to access and reduce the risk of soil contamination and groundwater pollution. This research investigates contamination transport by modeling the flow in the soil matrix. A two-dimensional numerical model for transport of diluted species was developed under steady and transient state condition using advection-diffusion equation in COMSOL multiphysics by creating a two-dimensional soil matrix profile of 250 cm in the X and Y direction with an oil drop of diameter 30 cm assumed within the profile. The model reveals that at the initial drop of 40 cm under steady state condition the concentration increases as the drop length increases, while in the vertical direction, the peak of the concentration increases with drop. It has been established that the profile developed, provides a good estimation for predicting the effect of a contaminant in a two-dimension soil matrix profile.
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