A numerical investigation of puddle jumping
A numerical investigation of puddle jumping
复制标题
DOI：
10.1063/1.5139235
复制
发表时间：
2020-01-01
影响因子：
4.6
通讯作者：
Weislogel, Mark
中科院分区：
文献类型：
--
作者：
Avhad, Amit;Tan, Hua;Weislogel, Mark
在常规落塔试验中，重力几乎逐步减小，导致许多有趣的大尺度毛细流动现象。例如，在这样的测试期间，观察到在疏水基底上处于平衡的液体水坑自发地从基底跳跃。实施一个修改版本的开源Gerris代码，我们数值研究这样的水坑跳跃现象的各种水坑在平面基板上。我们量化了一系列的水坑跳跃特性，包括跳跃时间，跳跃速度，和自由水坑振荡模式的一个神秘的范围内的滴体积在0.001毫升和15毫升之间，基板接触角在600和175度之间。一个数字政权地图的构建识别没有跳，标准跳，气泡摄入，间歇泉形成，滴裂变，和卫星水坑跳跃制度。有利的协议之间的模拟，实验，简单的理论模型，和标度律。由AIP Publishing授权出版。
The nearly step reduction in gravity arising in routine drop tower tests leads to numerous interesting large-length-scale capillary flow phenomena. For example, a liquid puddle at equilibrium on a hydrophobic substrate is observed to spontaneously jump from the substrate during such tests. Implementing a modified version of the open-source Gerris code, we numerically investigate such a puddle jump phenomenon for a variety of water puddles on flat substrates. We quantify a range of puddle jump characteristics including jump time, jump velocity, and free puddle oscillation modes for an unearthly range of drop volumes between 0.001 ml and 15 ml and substrate contact angles between 600 and 175 degrees. A numerical regime map is constructed identifying no jump, standard jump, bubble ingestion, geyser formation, drop fission, and satellite puddle jump regimes. Favorable agreement is found between the simulations, experiments, simple theoretical models, and scaling laws. Published under license by AIP Publishing.