This presentation introduces a method for simulating reactive solute transport as macro-scale lattice- Boltzmann models that incorporate material permeability as a model parameter. We demonstrate that the correct constitutive behavior for solute transport is obtained using a Chapman-Enskog expansion of the governing equations. Two methods for improving the model's stability in low permeability flows are also discussed: a) an implicit formulation of the model; and b) a formulation based on the partial-bounceback approach. The model's performance is evaluated through a comparison of simulated results with analytical solutions for one- and two-dimensional flows, as well as comparing the model's predictions to advection- diffusion simulations by TOUGH2. We conclude by applying this model to reactive flow through heterogeneous porous media, simulating host-rock dissolution and formation of preferred fluid pathways.
|Publication status||Published - 2008|
|Event||Fall Meeting of the American-Geophysical-Union 2008 - San Francisco, United States of America|
Duration: 15 Dec 2008 → 19 Dec 2008
|Conference||Fall Meeting of the American-Geophysical-Union 2008|
|Abbreviated title||AGU 2008|
|Country/Territory||United States of America|
|Period||15/12/08 → 19/12/08|