DYNAMICS OF PARTIAL WETTING
DYNAMICS OF PARTIAL WETTING
复制标题
DOI：
10.1016/0001-8686(92)80052-y
复制
发表时间：
1992-04-06
影响因子：
15.6
通讯作者：
DEGENNES, PG
中科院分区：
文献类型：
--
作者：
BROCHARDWYART, F;DEGENNES, PG
当接触角θ偏离平衡值θ（e）时，两大类模型已被用于描述接触线的运动：a）Eyring方法，强调尖端处单个分子的微观跳跃。B）流体动力学方法，集中于角θ的液体楔内的粘性损失。在本综述中，我们比较了两个模型的预测，为两个关键的实验：1）从静止的流体中拉出垂直板-显示（对于有限的θ（e））临界速度V（c），在该速度以上的板是完全润湿的。2）在小θ（e）下，由平坦液膜覆盖的非光滑表面的干斑的生长速度，其变化类似于θ（e）3。净结论是，在小θ（e）和低速度V下，流体动力学损失占主导地位，而在大θ（e）和大V下，分子特征可能是重要的。
Two broad classes of models have been used to describe the motion of a contact line when the contact angle-theta deviates from the equilibrium value-theta(e): a) an Eyring approach, emphasizing the microscopic jump of a single molecule at the tip. b) a hydrodynamic approach, concentrating on the viscous losses inside the liquid wedge of angle-theta. In the present review, we compare the predictions from both models, for two critical experiments :1) The pull out of a vertical plate from a fluid at rest -showing (for finite-theta(e)) a critical velocity V(c) above which the plate is completely wet.2) The velocity of growth of a dry patch for a non wettable surface covered by a flat liquid film which turns out to vary like theta(e)3 at small-theta(e).The net conclusion is that, at small-theta(e) and for low velocities V, the hydrodynamic losses dominate, while at large-theta(e) and large V, the molecular features are probably important.