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许勇琪, 彭泽瑞, 周新平. 液滴撞击柔性基底研究进展. 力学学报, 2024, 56(5): 1-11. DOI: 10.6052/0459-1879-23-603
引用本文: 许勇琪, 彭泽瑞, 周新平. 液滴撞击柔性基底研究进展. 力学学报, 2024, 56(5): 1-11. DOI: 10.6052/0459-1879-23-603
Xu Yongqi, Peng Zerui, Zhou Xinping. Research progress on drop impact on flexible substrates. Chinese Journal of Theoretical and Applied Mechanics, 2024, 56(5): 1-11. DOI: 10.6052/0459-1879-23-603
Citation: Xu Yongqi, Peng Zerui, Zhou Xinping. Research progress on drop impact on flexible substrates. Chinese Journal of Theoretical and Applied Mechanics, 2024, 56(5): 1-11. DOI: 10.6052/0459-1879-23-603

液滴撞击柔性基底研究进展

RESEARCH PROGRESS ON DROP IMPACT ON FLEXIBLE SUBSTRATES

  • 摘要: 液滴撞击固体基底现象广泛存在于自然界、日常生活及工业生产中. 在多数液滴撞击场景中, 固体基底可以近似地视为理想刚性基底. 然而在一些场景中, 具有较小杨氏模量或者几何结构为薄壁或细长类的固体基底在受到液滴撞击后会产生明显的变形, 而固体基底的形变反过来又会影响液滴的动力学行为. 相比于刚性基底情况, 液滴与柔性基底的耦合作用可能会引发新的动力学现象和机制. 因此, 柔性基底液滴撞击动力学的研究很有意义, 也成为一些学者当前关注的研究焦点之一. 根据几何结构的特点, 柔性基底可以分为柔性体、柔性面和柔性杆3种类型. 文章据此分类介绍与这3类柔性基底相关的液滴撞击动力学的研究进展. 柔性基底的可变形性是导致其液滴动力学与刚性基底液滴动力学存在差异的根本原因. 现有的研究表明, 基底柔性对液滴撞击的接触时间、最大铺展因子、气泡捕获、回弹和溅射等方面均存在着影响, 其中关于接触时间及溅射方面的结论可能为制造防水、抗冰和防溅射材料提供新思路.

     

    Abstract: The phenomenon of drop impact on solid substrates is highly prevalent, widely observed in nature, daily life, and industrial production process. In the majority of practical liquid droplet impact scenarios, the substrate can be approximated as an ideal rigid substrate. However, in some certain scenarios, solid substrates with a smaller Young's modulus or geometric structures characterized by thin walls or elongated forms undergo significant deformation upon being impacted by liquid droplets. At this point, such an approximation is no longer applicable at all. The deformation of the solid substrate, in turn, affects the dynamics of the liquid droplet. Compared to the impact of liquid droplets on rigid substrates, the impact of liquid droplets on flexible substrates is a more complex fluid-structure coupling phenomenon, and this coupling interaction between liquid droplets and flexible substrates may give rise to new dynamic mechanisms, which may lead to different droplet dynamics. Therefore, the study of the impact dynamics of liquid droplets on flexible substrates is meaningful, and it has become one of the current research focuses of some scholars. Based on the geometric characteristics of flexible substrates, they can be categorized into three fundamental types: flexible bodies, flexible surfaces, and flexible rods. This article introduces relevant research progress on liquid droplet impact on flexible substrates according to this classification. The deformability of flexible substrates is the fundamental reason for the differences in the dynamics of liquid droplets on flexible substrates compared to the dynamics on rigid substrates. Existing researches show that substrate flexibility has an effect on various aspects of droplet dynamics, including contact time, maximum spreading factor, bubbles capture, drop rebound, and splashing. Some researchers have suggested that the impact of liquid droplets on appropriately flexible substrates can effectively reduce contact time and suppress splashing phenomena, which may offer new insights for manufacturing materials requiring waterproofing, anti-icing, and splash resistance.

     

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