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Critical point network for drainage between rough surfaces

Amyot, Olivier and Flukiger, Frédérique and Geoffroy, Sandrine and Plouraboué, Franck and Prat, Marc Critical point network for drainage between rough surfaces. (2007) Transport in Porous Media, vol. 70 (n° 2). pp. 257-277. ISSN 0169-3913

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Official URL: http://dx.doi.org/10.1007/s11242-007-9098-3

Abstract

In this paper, we present a network method for computing two-phase flows between two rough surfaces with significant contact areas. Low-capillary number drainage is investigated here since one-phase flows have been previously investigated in other contributions. An invasion percolation algorithm is presented for modeling slow displacement of a wetting fluid by a non wetting one between two rough surfaces. Short-correlated Gaussian process is used to model random rough surfaces.The algorithm is based on a network description of the fracture aperture field. The network is constructed from the identification of critical points (saddles and maxima) of the aperture field. The invasion potential is determined from examining drainage process in a flat mini-channel. A direct comparison between numerical prediction and experimental visualizations on an identical geometry has been performed for one realization of an artificial fracture with a moderate fractional contact area of about 0.3. A good agreement is found between predictions and observations.

Item Type:Article
Additional Information:Thanks to Springer. The definitive version is available at http://www.springerlink.com. The original PDF of the article can be found at Transport in Porous Media website : http://www.springerlink.com/content/c088378t11p4880n/?MUD=MP
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: Franck PLOURABOUE

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