(Formation of capillary instability with a buoyant non-wetting fluid (orange) ascending through a saturated porous medium, using a LB based model)
Our group studies how pore-scale processes influence porous media flows at much greater scales (e.g. continuum or field scale). We use a combination of numerical calculations and lab experiments to study
- self-organization of multiphase flows in porous media during the injection of non-wetting fluids.
- multiphase transport at sharp transition in porosity/permeability.
- reconstructing porosity-permeability of anisotropic porous media.
- evolution of a porous medium and porosity-permeability correlations during melting/dissolution or precipitation.
- reduction of effective permeability with frequency during transient applied stress in the pore-fluid.
- reactive transport models at the pore-scale, the effect of physical (grain) and chemical (distribution of reactive surfaces) heterogeneities on reactive flows.
- the effect of the driving force for the flow (buoyancy versus pressure) on dispersion and solute transport.
These conceptual problems are motivated by questions associated with CO2 sequestration, the exsolution and transport of volatiles in magmatic environment, bio-geochemical cycles in porous media, groundwater remediation and geothermal flows.