Wetting Heterogeneities in Porous Media Control Flow Dissipation

Abstract : Pressure-controlled displacement of an oil-water interface is studied in dense packings of functionalized glass beads with well-defined spatial wettability correlations. An enhanced dissipation is observed if the typical extension ξ of the same-type wetting domains is smaller than the average bead diameter d. Three-dimensional imaging using x-ray microtomography shows that the frequencies nðsÞ of residual droplet volumes s for different ξ collapse onto the same curve. This indicates that the additional dissipation for small ξ is due to contact line pinning rather than an increase of capillary break-up and coalescence events.
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Julie Murison, Benoît Semin, Jean-Christophe Baret, Stephan Herminghaus, Matthias Schröter, et al.. Wetting Heterogeneities in Porous Media Control Flow Dissipation. Physical Review Applied, American Physical Society, 2014, 2 (3), pp.034002. ⟨10.1103/PhysRevApplied.2.034002⟩. ⟨hal-02119082⟩

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