VISCOUS BURSTING OF SUSPENDED FILMS
VISCOUS BURSTING OF SUSPENDED FILMS
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DOI：
10.1103/physrevlett.75.3886
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发表时间：
1995-11-20
影响因子：
8.6
通讯作者：
BROCHARDWYART, F
中科院分区：
文献类型：
--
作者：
DEBREGEAS, G;MARTIN, P;BROCHARDWYART, F
肥皂膜是通过惯性过程分解的。我们在这里首次观察到长链聚合物的自由悬浮膜，其中粘性效应占主导地位，没有表面活性剂存在。一个孔在时间0时成核，并在时间t时增长到半径R(t)。一个令人惊讶的特征是，从孔中流出的液体并没有聚集到一个边缘（就像在肥皂膜中一样）：液体扩散出去，而膜的厚度没有任何显著的变化。半径R(t)随时间呈指数增长，R与exp（t/tau）成正比[而在肥皂膜中R(t)是线性的]。上升时间与e/2成正比，其中e是粘度，e是厚度（微米范围内），γ是表面张力。提出了一个简单的模型来解释这一增长规律。
Soap films break up by an inertial process. We present here the first observations on freely suspended films of long-chain polymers, where viscous effects are dominant and no surfactant is present. A hole is nucleated at time 0 and grows up to a radius R(t) at time t. A surprising feature is that the liquid from the hole is not collected into a rim (as it is in soap films): The liquid spreads out without any significant change of the film thickness. The radius R(t) grows exponentially with time, R proportional to exp(t/tau) [while in soap films R(t) is linear]. The rise time tau proportional to eta e/2 gamma where eta is viscosity, e is thickness (in the micron range), and gamma is surface tension. A simple model is developed to explain this growth law.