Sauret Alban, Boulogne François, Soh Beatrice, Dressaire Emilie, Stone Howard A
Surface du Verre et Interfaces, UMR 125, 93303, Aubervilliers, France.
Department of Mechanical and Aerospace Engineering, Princeton University, 08544, Princeton, NJ, USA.
Eur Phys J E Soft Matter. 2015 Jun;38(6):62. doi: 10.1140/epje/i2015-15062-y. Epub 2015 Jun 29.
We characterize the different morphologies adopted by a drop of liquid placed on two randomly oriented fibers, which is a first step toward understanding the wetting of fibrous networks. The present work reviews previous modeling for parallel and touching crossed fibers and extends it to an arbitrary orientation of the fibers characterized by the tilting angle and the minimum spacing distance. Depending on the volume of liquid, the spacing distance between fibers and the angle between the fibers, we highlight that the liquid can adopt three different equilibrium morphologies: 1) a column morphology in which the liquid spreads between the fibers, 2) a mixed morphology where a drop grows at one end of the column or 3) a single drop located at the node. We capture the different morphologies observed using an analytical model that predicts the equilibrium configuration of the liquid based on the geometry of the fibers and the volume of liquid.
我们描述了放置在两根随机取向纤维上的一滴液体所呈现的不同形态，这是理解纤维网络润湿性的第一步。目前的工作回顾了先前针对平行和接触交叉纤维的建模，并将其扩展到以倾斜角和最小间距距离为特征的纤维任意取向情况。根据液体体积、纤维间间距距离以及纤维间夹角，我们强调液体可呈现三种不同的平衡形态：1）柱状形态，即液体在纤维间铺展；2）混合形态，液滴在柱体一端生长；3）单个液滴位于节点处。我们使用一个分析模型捕捉到了观察到的不同形态，该模型基于纤维几何形状和液体体积预测液体的平衡构型。
