Spatial and temporal features of dense contaminant transport: experimental investigation and numerical modeling

TL;DR

This paper combines experimental and numerical methods to analyze the spatial and temporal behavior of dense contaminant plumes in porous media, providing insights into pollutant migration and interface dynamics.

Contribution

It introduces novel experimental data and a finite element modeling approach to better understand dense contaminant transport in saturated porous materials.

Findings

Experimental concentration profiles inside a vertical column.

Finite element simulations match experimental data.

Qualitative insights into interfacial dynamics between fluids.

Abstract

We investigate the spatial and temporal features of dense contaminant plumes dynamics in porous materials. Our analysis is supported by novel experimental results concerning pollutant concentration profiles inside a vertical column setup. We describe the experimental methods and elucidate the salient outcomes of the measurements, with focus on miscible fluids in homogeneous saturated media. By resorting to a finite elements approach, we numerically solve the equations that rule the pollutants migration and compare the simulation results with the experimental data. Finally, we qualitatively explore the interfacial dynamics behavior between the dense contaminant plume and the lighter resident fluid that saturates the column.