For nonaqueous phase liquids (NAPLs) that are commonly found at contaminted sites, the aqueous/ nonaqueous phase mass transfer is a process of crucial importance for both predicting groundwater contamination and determining the best cleanup methodology. The mass transfer process deserves further study as the constitutive relations derived from the experimental porous medium systems are generally not applicable to other media.In this work, we applied a multi-step pore-scale modeling approach to simulate the dissolution of a residual NAPL in a three-dimensional random sphere-pack medium. The residual NAPL distribution was generated using a morphological approach. With a detailed flow field simulated with a lattice-Boltzmann (LB) approach, we solved the advection-diffusion equation in the pore space using a high-resolution, adaptive-stencil numerical scheme and operator splitting. The mass transfer rate predicted in the approach was compared to experimental observations by Miller et al. [16]. © 2004 Elsevier B.V.
Dalla, E., Pitea, D., Pan, C., Miller, C. (2004). Pore-scale modeling of residual non-aqueous phase liquid dissolution. In Computational methods in water resources: proceedings of the XVth International Conference on Computational Methods in Water Resources (CMWR XV), June 13-17, 2004, Chapel Hill, NC, USA (pp.197-207). Elsevier.
Pore-scale modeling of residual non-aqueous phase liquid dissolution
PITEA, DEMETRIO;
2004
Abstract
For nonaqueous phase liquids (NAPLs) that are commonly found at contaminted sites, the aqueous/ nonaqueous phase mass transfer is a process of crucial importance for both predicting groundwater contamination and determining the best cleanup methodology. The mass transfer process deserves further study as the constitutive relations derived from the experimental porous medium systems are generally not applicable to other media.In this work, we applied a multi-step pore-scale modeling approach to simulate the dissolution of a residual NAPL in a three-dimensional random sphere-pack medium. The residual NAPL distribution was generated using a morphological approach. With a detailed flow field simulated with a lattice-Boltzmann (LB) approach, we solved the advection-diffusion equation in the pore space using a high-resolution, adaptive-stencil numerical scheme and operator splitting. The mass transfer rate predicted in the approach was compared to experimental observations by Miller et al. [16]. © 2004 Elsevier B.V.
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