论文标题
有限大小的空气水界面的非接触性流变学
Contactless rheology of finite-size air-water interfaces
论文作者
论文摘要
我们提供了无接触式的原子能显微镜测量，该测量是刚性球体和微尺度水中的气泡之间的流体动力相互作用。发现气泡的大小由于空气水界面的远距离毛细管变形而对响应产生了重大影响。为了合理化实验数据，我们为有限尺寸效应开发了粘毛润滑模型。实验与理论之间的比较使我们能够测量空气水的表面张力，而无需接触，从而铺平了污染空气水接口的不接触式张力仪的道路。
We present contactless atomic-force microscopy measurements of the hydrodynamic interactions between a rigid sphere and an air bubble in water at the micro-scale. The size of the bubble is found to have a significant effect on the response due to the long-range capillary deformation of the air-water interface. To rationalize the experimental data, we develop a viscocapillary lubrication model accounting for the finite-size effect. The comparison between experiments and theory allows us to measure the air-water surface tension, without contact, paving the way towards robust contactless tensiometry of polluted air-water interfaces.
