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在圆表面上滴滴冲击行为与周边湿度差异的圆表面
Taku Ishikawa1, Yutaka Yamada2, Kazuma Isobe2
1Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Kita-ku, Okayama 700-8530, Japan.
Langmuir : the ACS journal of surfaces and colloids
|March 13, 2025
概括
控制滴滴对具有不同湿度的曲面的影响对于冷却和除冰等应用至关重要. 这项研究揭示了可湿度差异如何驱动滴滴行为,从而更好地控制跳跃和传播.
科学领域:
- 流体动力学 流体动力学
- 表面科学是一门学科.
- 材料科学 材料科学 材料科学
背景情况:
- 控制滴水冲击对于诸如散热冷却和防结冰等应用至关重要.
- 之前的研究探讨了滴滴对超水的曲面和平面表面的影响,并指出接触时间更短.
- 有限的研究存在于滴水对曲表面的影响,有着可湿性差异,这是滴水控制的一个有希望的领域.
研究的目的:
- 为了研究水滴对曲面的冲击行为,在曲面上具有不同的可湿性 (水友性到超性).
- 探索冲击速度,气直径和旋转角度对滴滴动态的影响.
- 了解如何湿度差异驱动滴滴变形和曲线基板上的运动.
主要方法:
- 对铜圆筒进行了滴滴撞击实验,并控制了周边湿度.
- 多种参数包括冲击速度,气直径 (4和6毫米) 和旋转角度.
- 将滴水的行为分为四种类型:反弹,反弹和分裂,附着和附着和分裂.
主要成果:
- 影响湿度边界的水滴表现出不对称的变形,并由于湿度梯度而向水友侧移动.
- 确定了四种不同的滴水行为:跳跃,跳跃与分裂,附着和附着与分裂.
- 通过在平面基板上使用最大扩散宽度,韦伯数和旋转角度,成功估计滴滴的附着或反弹,与实验结果保持一致.
结论:
- 曲面上的湿度差异有效地驱动滴水的行为,提供了一种滴水控制机制.
- 该研究提供了一个框架,可以根据关键参数预测这些表面上的滴水冲击结果.
- 这些发现有助于设计用于需要精确滴滴操纵的先进应用的表面.
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