Abstract

The evaporation of water droplet on various heated surfaces (smooth and textured walls) has been studied experimentally. The temperature field of the droplet surface has a more uniform distribution on a hydrophilic textured surface of substrate. During evaporation of water droplet on a hydrophobic wall, the temperature field is substantially inhomogeneous. Measurements in a vertical cross section of a droplet on a hydrophobic surface were done by the particle image velocimetry method. They reveal occurrence of a toroidal vortex flow in the liquid. The average velocity of free convective motion in a droplet decreases as the evaporation goes on. The maximum heat flux during droplet evaporation corresponds to a hydrophilic textured surface.

中文翻译：

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不同接触角下加热纹理壁上水滴的蒸发

摘要

已经通过实验研究了水滴在各种加热表面（光滑和有纹理的墙壁）上的蒸发。液滴表面的温度场在基材的亲水纹理表面上具有更均匀的分布。在疏水壁上的水滴蒸发期间，温度场基本上是不均匀的。通过粒子图像测速法测量疏水表面上液滴的垂直截面。它们揭示了液体中发生了环形涡流。液滴中自由对流运动的平均速度随着蒸发的进行而降低。液滴蒸发过程中的最大热通量对应于亲水纹理表面。