ABSTRACT High-speed imaging of water drop impacts on a polymer surface have been used alongside two-dimensional Lattice Boltzmann simulations to investigate the conditions under which a spreading lamella submerges a small surface ridge. Three basic outcomes have been observed when the lamella comes into contact with the ridge: pinning, wetting and splashing. The effects of Weber number and the dimensionless distance between the impact point and the ridge are investigated, and a phase portrait of the different wetting outcomes is presented. For each of the potential outcomes, a side-by-side comparison of experimental and numerical results can be made. An energy balance approach is used to study the transitions between the different outcomes.

中文翻译：

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液滴撞击过程中微尺度脊对动态润湿的影响

摘要 水滴撞击聚合物表面的高速成像已与二维格子玻尔兹曼模拟一起使用，以研究展开的薄片淹没小表面脊的条件。当薄片与脊接触时，观察到三个基本结果：钉扎、润湿和飞溅。研究了韦伯数和撞击点与脊之间的无量纲距离的影响，并呈现了不同润湿结果的相图。对于每个潜在结果，可以对实验结果和数值结果进行并排比较。能量平衡方法用于研究不同结果之间的转变。