Musterd Michiel, van Steijn Volkert, Kleijn Chris R, Kreutzer Michiel T
Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands.
Phys Rev Lett. 2014 Aug 8;113(6):066104. doi: 10.1103/PhysRevLett.113.066104. Epub 2014 Aug 5.
Local contact line pinning prevents droplets from rearranging to minimal global energy, and models for droplets without pinning cannot predict their shape. We show that experiments are much better described by a theory, developed herein, that does account for the constrained contact line motion, using as an example droplets on tilted plates. We map out their shapes in suitable phase spaces. For 2D droplets, the critical point of maximum tilt depends on the hysteresis range and Bond number. In 3D, it also depends on the initial width, highlighting the importance of the deposition history.
局部接触线钉扎可防止液滴重新排列以达到最小的全局能量，而无钉扎的液滴模型无法预测其形状。我们表明，本文提出的一种理论能更好地描述实验情况，该理论确实考虑了受约束的接触线运动，以倾斜板上的液滴为例。我们在合适的相空间中描绘出它们的形状。对于二维液滴，最大倾斜的临界点取决于滞后范围和邦德数。在三维情况下，它还取决于初始宽度，突出了沉积历史的重要性。
