Journal
JOURNAL OF CONTAMINANT HYDROLOGY
Volume 56, Issue 1-2, Pages 25-48Publisher
ELSEVIER
DOI: 10.1016/S0169-7722(01)00202-9
Keywords
porous media; multiphase; interfacial areas; meniscus; pore-scale model
Funding
- NIEHS NIH HHS [5 P42 ES05948-02] Funding Source: Medline
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We develop a method to compute interfacial areas from three-dimensional digital representations of multiphase systems. We approximate the interfaces with the isosurface generated by the standard marching-cube algorithm from the discrete phase distribution. We apply this approach to two-fluid pore-scale simulations by (1) simulating a random packing of spheres that obeys the grain-size distribution and porosity of an experimental porous medium system, and (2) using a previously developed pore-morphology-based model in order to predict the phase distribution for a water-wet porous medium that undergoes primary drainage. The predicted primary drainage curve and interfacial areas are in good agreement with the experimental values reported in the literature, where interfacial areas were measured using inter-facial tracers. The energy dissipation during Haines jumps is significant: thus, the mechanical work done on the system is not completely converted into surface energy, and interfacial areas may not be deduced from the primary drainage curve. (C) 2002 Elsevier Science B.V All rights reserved.
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