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

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