Abstract In this work, we present an experimental study of the evaporation of oil drops deposited on both textured and smooth silicon substrates at two different temperatures (20 °C and 270 °C). We show that the sessile drops take a hexagonal form and are linked by an oil film (a droplet sitting on a mixture of solid and liquid). This wetting regime represents the Wenzel-like regime. We are particularly interested in the propagation of the oil film on the textured surface over time. The effect of the surface fraction of the micro-textures ∅ and the temperature of the substrate Th on the film propagation were also studied. We reveal that the spreading length of the oil drops increases as ∅ decreases and Th increases. We also demonstrate that the textured surface favors oil drop evaporation.

中文翻译：

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文泽尔样体系中无柄油滴的蒸发

摘要 在这项工作中，我们提出了在两种不同温度（20 °C 和 270 °C）下沉积在纹理和光滑硅基板上的油滴蒸发的实验研究。我们展示了无柄液滴呈六边形，并通过油膜（位于固体和液体混合物上的液滴）连接。这种润湿状态代表了类似温泽尔的状态。我们对油膜在带纹理的表面上随时间的传播特别感兴趣。还研究了微纹理的表面分数 ∅ 和衬底温度 Th 对薄膜传播的影响。我们发现油滴的扩散长度随着∅的减小和 Th 的增加而增加。我们还证明了纹理表面有利于油滴蒸发。