标题： 非饱和颗粒材料中液相的平衡分布 显示英文标题

标题： Equilibrium distribution of the liquid phase in an unsaturated granular material

摘要： 在非饱和颗粒材料中，液体相的空间分布是重力和毛细力之间竞争的结果。 我们表明，在润湿区状态下，它可以由玻尔兹曼定律描述，静态无序起到热扰动的作用。 我们提出一种基于朗之万方程的方法来推导这种分布，并将我们的预测与给出局部含水量随高度变化的电导率测量结果进行比较。 我们表明，不同多分散性样品获得的实验数据都落在与我们的模型一致的单一主曲线上。 显示英文摘要

摘要： In an unsaturated granular material, the spatial distribution of the liquid phase results from the competition between gravity and capillary forces. We show that, in the funicular regime, it can be described by a Boltzmann law, with static disorder playing the role of thermal agitation. We propose an approach based on a Langevin equation to derive this distribution, and compare our predictions with conductivity measurements giving the local water content as a function of height in a wet granular medium. We show that experimental data obtained with samples of different polydispersities collapse on a single master curve consistent with our model.