Continuity and momentum equations govern the pore-scale flow properties of fluid in porous media, whereas Darcy’s law governs Darcy scale transport media. The empirical shift factor relates steady shear-dependent viscosity non-Newtonian fluids to reported values cover three orders magnitude depending on considered fluid-medium configurations. This creates a challenge upscale rheology from scale...

SUMMARY: Investigations into landfill simulation reactors and a full scale landfills are used for predicting emissions from municipal solid waste landfills. In the present study the water flow and solute transport through a landfill simulation reactor and a full scale landfill (using the same waste) has been investigated. The results indicate that, due to preferential flow pathways the water fl...

We describe computer simulations of pore formation and membrane rupture of phospholipid bilayers under mechanical and electrical stress. On the nanosecond simulation time scale, pores are induced by a lateral pressure exceeding -200 bar or by an applied electric field of 0.5 V/nm.

A model for determining the permeability of fractural porous media based on the double percolation model is presented. The results are close to that by fractural permeability tensor model. The non-uniformity of the permeability and the pore pressure are investigated by parameter study. It is shown that rocks could be divided into “pore-controlling” permeability and “fracture-controlling” permea...

Quantifying CO2 transport and average effective reaction rates in the subsurface is essential to assess the risks associated with underground carbon capture and storage. We use X-ray microtomography to investigate dynamic pore structure evolution in situ at temperatures and pressures representative of underground reservoirs and aquifers. A 4 mm diameter Ketton carbonate core is injected with CO...

Water flooding is a commonly used technique to improve oil recovery, although the amount of left in reservoirs after procedure still significant. Gas displacement water an effective way recover residual oil, but occurrence state and flow principles multiphase fluid gas injection are ambiguous. Therefore, process should be studied on pore scale provide basis for formulating reasonable program. M...

Gaseous flow through ultra-tight porous media, e.g. shale and some high-performance insulation materials, is often rarefied, invalidating an analysis by the continuum theory. Such rarefied flows can be accurately described kinetic theory of gases which utilizes Boltzmann equation its simplified models. While discrete velocity methods have been successful in directly solving these equations, imm...