论文标题
随机薄膜易碎的晶格玻尔兹曼模拟
Lattice Boltzmann simulations of stochastic thin film dewetting
论文作者
论文摘要
我们从数值上研究热波动和可变流体 - 基底相互作用对薄液膜自发脱水的影响。为此，我们使用最近开发的晶格Boltzmann方法来用于薄膜流，并配备了正确设计的随机术语。虽然众所周知，热波动会产生较短的破裂时间，但我们表明，这是亲水性底物的一般特征，而与接触角有关。但是，确定性和随机破裂时间之间的比率以$θ$降低。最后，我们讨论了在化学图案化的底物上易碎薄膜侵蚀及其对润湿性梯度形式的依赖的情况。
We study numerically the effect of thermal fluctuations and of variable fluid-substrate interactions on the spontaneous dewetting of thin liquid films. To this aim, we use a recently developed lattice Boltzmann method for thin liquid film flows, equipped with a properly devised stochastic term. While it is known that thermal fluctuations yield shorter rupture times, we show that this is a general feature of hydrophilic substrates, irrespective of the contact angle. The ratio between deterministic and stochastic rupture times, though, decreases with $θ$. Finally, we discuss the case of fluctuating thin film dewetting on chemically patterned substrates and its dependence on the form of the wettability gradients.
