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 micro-scale 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.

中文翻译：

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在模型性开放性骨折中，流体-流体锋面的毛细跳越过基本收缩

我们通过实验研究了在模型开放性裂缝中油-气锋在局部收缩区域内的准静态位移。在吸水和排水过程中，前部在收缩的一端会发生毛细跳动，从而导致微尺度的压力-饱和滞后循环。在另一端，正面可逆地固定。在前部的恢复弹性与孔径的局部变化所产生的变形之间的局部机械平衡条件，仅在材料和几何特性方面，就可以定量地测量所有的结果。