Droplet impact on elastic beams is considered as a novel model of energy transfer which is a promising alternative in applications of energy harvesting. The transient impact process is dominated by the fluid–solid interaction and the capillary effect. The numerical model based on SPH method allows predicting the droplet dynamic behaviors due to super-hydrophobic (SH) surfaces. The predicted results are also compared with relevant experiments to verify the robustness and flexibility of the model. For fixed-fixed beams, typical regimes, namely spherical-shaped rebound, pancake-shaped rebound and splashing of droplet, are identified. The elasticity of beam causing the earlier lifting-off phenomenon of droplet is investigated in detail. By comparison, cantilever beams repel the droplet in a smoother way and large deformation of the beam is considered. The slipping-off phenomenon is expected to occur under specific conditions on soft cantilevers. The effect of elasticity plays a key role in the maximum deflection and oscillating frequency for both types of beams. This work examines the effectiveness of the framework based on the numerical model which provides further understandings for droplet impacts. It may lay the foundation for practical applications, such as engineering piezoelectric raindrop energy harvesters and plant leaves repelling raindrops.

中文翻译：

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水滴对水平梁影响的数值研究

液滴对弹性梁的冲击被认为是一种新的能量传递模型，是能量收集应用中的一种有前途的替代方案。瞬态冲击过程以流固相互作用和毛细效应为主。基于 SPH 方法的数值模型允许预测由于超疏水 (SH) 表面引起的液滴动态行为。还将预测结果与相关实验进行比较，以验证模型的鲁棒性和灵活性。对于固定固定光束，识别出典型的状态，即球形回弹、煎饼形回弹和液滴飞溅。详细研究了梁的弹性引起液滴较早的升空现象。相比之下，悬臂梁以更平滑的方式排斥液滴，并且考虑了梁的大变形。滑脱现象预计会在特定条件下发生在软悬臂梁上。弹性效应在两种梁的最大挠度和振荡频率中都起着关键作用。这项工作基于数值模型检验了框架的有效性，为液滴撞击提供了进一步的理解。它可能为实际应用奠定基础，例如工程压电雨滴能量收集器和植物叶子排斥雨滴。这项工作基于数值模型检验了框架的有效性，为液滴撞击提供了进一步的理解。它可能为实际应用奠定基础，例如工程压电雨滴能量收集器和植物叶子排斥雨滴。这项工作基于数值模型检验了框架的有效性，为液滴撞击提供了进一步的理解。它可能为实际应用奠定基础，例如工程压电雨滴能量收集器和植物叶子排斥雨滴。