From the pore scale to the lab scale: 3-D lab experiment and numerical simulation of drainage in heterogeneous porous media

Measuring the effect of structural connectivity on the water dynamics in heterogeneous porous media using speedy neutron tomography

“…In this subsection, we will test whether this effect is qualitatively reproduced in simulations based on Richards equation. The goal of this subsection is not an exact quantitative comparison between measurements and model results (such a comparison for similarly structured sand columns will be presented in the same issue [20,32]). We will make a statement if the effect of connectivity can be simulated based on Richards equation with the water retention function parameterized according to the van Genuchten model.…”

Pore-scale events in drainage process through porous media under high- and low-interfacial tension flow conditions

“…Revil et al (2007) Illustrated the dependency of the relative streaming potential coupling coefficient on water saturation, sample properties, and saturation history. Papafotiou et al (2008) Carried out two successive drainage steps tests in 3-dimensional samples. Vasin et al (2008) Carried out the multi-step drainage in heterogeneously packed columns.…”

“…Studies have also been conducted on the simulation of the drainagetype displacements based on the quasi-static pore-scale approach (Hilpert and Miller, 2001), model considering phase trapping (Bryant and Johnson, 2003), invasion percolation model (Neuweiler et al, 2004), bundle of tubes model (Helland and Skjaeveland, 2006;Virnovsky et al, 2009), medial axis analysis (Lindquist, 2006), mathematical relationships for the removal of the wetting liquids (Mayer and Stowe, 2006), quasi-static displacements (Prodanović and Bryant, 2006), lattice-Boltzmann pore-scale modeling (Papafotiou et al, 2008), upscaled model derived with the homogenization theory (Vasin et al, 2008), aperture-scale simulation using level set method , and the grain-based model within fractional-wet porous media (Motealleh et al, 2009).…”

Combining steam injection with hydraulic fracturing for the in situ remediation of the unsaturated zone of a fractured soil polluted by jet fuel

“…After a long period of contamination, the NAPL may have accumulated inside the low permeability porous matrix, which has limited accessibility to the high permeability pathways (Totsche et al, 2003;Harrar et al, 2007). This situation becomes more complicated when dealing with highly heterogeneous soils (Rosqvist and Destouni, 2000;Reynolds and Kueper, 2001;Papafotiou et al, 2008;Tzovolou et al, 2009). Soil remediation technologies (e.g.…”