Pore-scale simulation of entrapped non-aqueous phase liquid dissolution

摘要: Abstract We investigated the dissolution of non-aqueous phase liquids (NAPLs) in a three-dimensional random sphere-pack medium using pore-scale modeling approach to advance fundamental understanding and connect rigorously microscale processes. Residual NAPL distributions were generated morphological entrapped non-wetting was quantitatively characterized by calculating volume, orientation, interfacial area, shape isolated regions. With detailed aqueous-phase flow field obtained multiple-relaxation time lattice Boltzmann approach, we solved advective–diffusive equation pore space high-resolution, adaptive-stencil finite-volume scheme an operator-splitting algorithm. show good agreement between mass transfer rates predicted computational previously published experimental observations. The simulations presented this work provide first comparison considerable that has been performed derive constitutive relations quantify from residual flowing aqueous phase.