Luo Cheng, Heng Xin, Xiang Mingming
Department of Mechanical and Aerospace Engineering, University of Texas at Arlington , 500 W. First Street, Woolf Hall 226, Arlington, Texas 76019, United States.
Langmuir. 2014 Jul 22;30(28):8373-80. doi: 10.1021/la500512e. Epub 2014 Jul 11.
Liquid drops have shown interesting behaviors between two nonparallel plates. These plates may be fixed or movable relative to each other. In this work, we also explore these behaviors through a combination of theoretical and experimental investigations and obtain some new results. We show that when the two plates are fixed, different from the previous understanding, a lyophilic drop may not necessarily fill the corner of the two plates. We also demonstrate that it may fill the corner, when more liquid is added to the drop or when the top plate is lifted. Furthermore, we propose a physical model to interpret the shifting effect of a liquid drop. This effect appears when the drop is squeezed and relaxed between two nonparallel plates, and it has been used by some shorebirds to transport prey. On the basis of the proposed model, we have found three new phenomena related to the shifting effect.
液滴在两个不平行的平板之间呈现出了有趣的行为。这两个平板可能相对彼此固定或可移动。在这项工作中，我们还通过理论和实验研究相结合的方式探索了这些行为，并获得了一些新成果。我们表明，当两个平板固定时，与之前的认知不同，亲液性滴不一定会填充两个平板的角落。我们还证明，当向液滴中加入更多液体或抬起顶板时，它可能会填充角落。此外，我们提出了一个物理模型来解释液滴的移动效应。当液滴在两个不平行的平板之间被挤压和松弛时会出现这种效应，并且一些滨鸟已经利用了这种效应来运输猎物。基于所提出的模型，我们发现了与移动效应相关的三个新现象。
