Dynamic pressures in porous media

Three Pressures in Swelling Porous Media

For a two-phase swelling porous medium, two pressures have been previously defined thermodynamically in terms of intensive variables for each phase: one relating the change in energy with respect to specific volume, and the other relating the change in energy with respect to volume fraction. Within the framework of Hybrid Mixture Theory and hence the Coleman and Noll technique of exploiting the...

Infiltration in Porous Media with Dynamic Capillary Pressure: Travelling Waves

We consider a model for non-static groundwater flow where the saturation-pressure relation is extended by a dynamic term. This approach together with a convective term due to gravity, results in a pseudo-parabolic Burgers type equation. We give a rigorous study of global travelling wave solutions, with emphasis on the role played by the dynamic term and the appearance of fronts.

Dynamic arrest in model porous media - intermediate scattering functions

Institut für Theoretische Physik, Friedrich-A Staudtstraße 7, 91058, Erlangen, Germany. Institut für Theoretische Physik II: Wei Düsseldorf, Universitätsstraße 1, 40225 Düs Max-Planck-Institut für Intelligente System Germany Institut für Theoretische Physik IV, Univers Stuttgart, Germany Institut für Materialphysik im Weltraum, De (DLR), 51170 Köln, Germany Zukunskolleg, Fachbereich Physik, Un...

Dynamic network modeling of two-phase drainage in porous media.

We present a dynamic network model for modeling two-phase flow. We account for wetting layer flow, meniscus oscillation, and the dynamics of snapoff. Interfaces are tracked through pore elements using a modified Poiseuille equation for the equivalent hydraulic resistance of the fluids between the pore element centers. The model is used to investigate the effects of capillary number and viscosit...

Application of the Boundary Element Method to two Dimensional Dynamic Problems of Saturated Porous Media