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不同温度下飞秒激光制备的微纳结构表面对撞击液滴运动行为的影响
Effect of Surfaces of Micro-Nano Structures Prepared by Femtosecond Lasers on Motion of Impacting Droplets at Different Temperatures

DOI: 10.12677/APP.2020.102020, PP. 161-167

Keywords: 飞秒激光，微纳形貌，高温环境，Leidenfrost状态，撞击液滴
Femtosecond Laser, Micro-Nano Morphology, High Temperature Environment, Leidenfrost State, Impact Droplet

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Abstract:

液滴撞击固体表面的现象对于防冰、传热和水管理等技术领域具有重要的意义。不同于常温和低温条件，当固体表面温度升高到一定范围时，撞击表面的液滴会处于一种名为Leidenfrost的热状态，此时液滴会变得相当活跃。在这种状态下，分析撞击液滴的运动行为是很有挑战性的。在本文中，我们通过飞秒激光加工技术制备出了不同形貌的微纳结构表面，通过对比超亲水和超疏水两种极端润湿性表面在不同温度下的液滴撞击行为，分析了温度对撞击表面的液滴运动行为的影响规律。该研究对液滴动力学的理解与控制具有重要意义，并且为未来高温多功能表面的应用开辟了新的思路。
The phenomenon of droplets hitting a solid surface is of great significance for technical fields such as ice protection, heat transfer and water management. Unlike normal and low temperature conditions, when the solid surface temperature rises to a certain range, the droplets hitting the surface will be in a thermal state called Leidenfrost, at which time the droplets will become quite active. In this state, analyzing the motion behavior of the impacting droplets is very challenging. In this paper, we prepared micro-nano structured surfaces with different morphologies by using femtosecond laser processing technology. By comparing the impact behavior of droplets of two types of ultra-wettable and ultra-hydrophobic surfaces with different wettability at different temperatures, we analyzed the influence of temperature on the motion of droplets hitting the surface. This research is of great significance for understanding and controlling droplet dynamics, and opens up new ideas for the application of high temperature multifunctional surfaces in the future.

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