@article{Dehqani Tafti_Doulati Ardejani_Fatehi Marji_Shiri_2021, title={Simulation of aquifer remediation from low-permeable lenses by back-diffusion phenomenon}, volume={36}, url={https://hrcak.srce.hr/ojs/index.php/rgn/article/view/17791}, DOI={10.17794/rgn.2021.5.6}, abstractNote={<p>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.</p>}, number={5}, journal={Rudarsko-geološko-naftni zbornik}, author={Dehqani Tafti, Mojtaba and Doulati Ardejani, Faramarz and Fatehi Marji, Mohammad and Shiri, Yousef}, year={2021}, month={Nov.} }