Simulation of aquifer remediation from low-permeable lenses by back-diffusion phenomenon




Lattice Boltzmann Method (LBM), contamination back-diffusion, low-permeable lenses, aquifer remediation, dual permeable medium (DPM)


Fluid flow in a dual permeable medium (DPM) is essential in solute transport in mining and aquifer studies. In this paper, water flushing into a contaminated DPM containing fine-grained lenses with different geometries was investigated with the Lattice Boltzmann Method (LBM). The LBM model used in this study was D2Q9 with a relaxation time of 1, a cohesion value of 3 for a fluid density of 1 (mu.Lu-3). The saturated fluid in the DPM was a contaminant that usually stays in low permeable lenses and after flushing, it is leaked into the porous medium by a second fluid (water). This phenomenon is predominant when the displacing fluid has a lower concentration than the contaminated fluid. Diffusion and advection are the main mechanisms that control fluid flow in the porous medium. The results of the simulations showed: (1) advection controlled solute transport through the flushing phase, and back-diffusion occurred after the change in phase; (2) the lenses’ geometry influenced the fluid flow pattern and the remediation process. As a result, aquifer remediation strategies based on the lenses’ geometry and their permeability can help us select the appropriate environmental protection.




How to Cite

Dehqani Tafti, M. ., Doulati Ardejani, F., Fatehi Marji, M., & Shiri, Y. . (2021). Simulation of aquifer remediation from low-permeable lenses by back-diffusion phenomenon. Rudarsko-geološko-Naftni Zbornik, 36(5).



Petroleum Engineering and Energetics