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Capillary jumps of fluid-fluid fronts across an elementary constriction in a model open fracture
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We study experimentally the quasistatic displacement of an oil-air front across a localized constriction in a model open fracture. The front experiences capillary jumps at one end of the constriction in both imbibition and drainage, leading to a microscale pressure-saturation hysteresis cycle. At the other end the front is reversibly pinned. A condition of local mechanical equilibrium between the restoring elasticity of the front and the distortion produced by the local change in aperture captures all we measure quantitatively, in terms of material and geometrical properties only.
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PLANET LATORRE, Ramon, DÍAZ PIOLA, Lautaro and ORTÍN, Jordi. Capillary jumps of fluid-fluid fronts across an elementary constriction in a model open fracture. Physical Review Fluids. 2020. Vol. 5, num. 044002-1-044002-10. ISSN 2469-990X. [consulted: 23 of May of 2026]. Available at: https://hdl.handle.net/2445/157966