薄薄的液体薄膜的替代性潮湿路径
Yerushalmi-Rozen1, Kerle, Klein
1Department of Chemical Engineering, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel. Department of Materials and Interfaces, Weizmann Institute of Science, 76100 Rehovot, Israel.
Science (New York, N.Y.)
|August 24, 1999
概括
在薄液体薄膜中,一种新的潮湿路径涉及相位分离,随后是快速的孔形成和断裂. 马兰戈尼流驱动这种加速的露水过程,导致比传统方法更快的滴水形成.
科学领域:
- 材料科学 材料科学 材料科学
- 流体动力学 流体动力学
- 物理化学 物理化学
背景情况:
- 部分可混合的液体混合物的薄膜可以表现出转移稳定的状态.
- 经典的湿机制通常涉及缓慢的破裂过程.
- 了解薄膜不稳定性对于涂料和微流体应用至关重要.
研究的目的:
- 描述一种替代的途径,用于启动薄型超稳定薄膜中的潮湿.
- 为了研究相位分离和流体流动在薄膜破裂中的作用.
- 为了阐明驱动加速潮湿率的机制.
主要方法:
- 部分可混合液体混合物的薄膜中的潮湿的观察和分析.
- 在潮湿之前的相隔的识别.
- 研究孔形成和传播动态的研究.
- 分析流体流动,包括马兰戈尼效应,在接口.
主要成果:
- 一个新湿路径,由液相之间的界面相位分离启动.
- 观察到露水通过孔形成从样本边缘向内传播.
- 薄膜分解成滴滴的速度比经典模型预测的要快得多.
- 马兰戈尼流被确定为露水前线传播的发起者.
- 两个阶段的流量之间的合加快了洞的形成.
结论:
- 阶段分离之后接口脱湿提供了经典破裂机制的替代方案,用于薄膜不稳定性.
- 马兰戈尼流和相间流合是快速露水和滴水形成的关键驱动因素.
- 这一途径为部分混合系统中的薄膜动力学提供了新的理解.
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