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Slow two‐phase flow in artificial fractures: Experiments and simulations
Author(s) -
Amundsen Håkon,
Wagner Geri,
Oxaal Unni,
Meakin Paul,
Feder Jens,
Jøssang Torstein
Publication year - 1999
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/1999wr900147
Subject(s) - wetting , materials science , mechanics , aperture (computer memory) , displacement (psychology) , fluid dynamics , inlet , optics , composite material , geology , structural engineering , engineering , physics , psychology , psychotherapist , geomorphology
The slow displacement of a wetting fluid by a nonwetting fluid in models of a single fracture was studied experimentally and by computer simulations on identical geometries. The fracture was modeled by the gap between a rough plate and a smooth transparent plate, both oriented horizontally. Two different rough plates were used, a textured glass plate and a polymethyl methacrylate plate with a computer‐generated pattern. A nonwetting fluid (air) was injected slowly through an inlet into the model and displaced a wetting fluid (water) initially filling the model. The aperture fields of the artifical fractures were measured using a light absorption technique. The experiments were simulated using modified invasion percolation models, making use of the measured aperture fields. The simulation models captured invasion bursts and fragmentation and redistribution of the invading air. Experiments and simulations were compared step by step, and good qualitative and quantitative agreement was found.