超疏水表面上液滴碰撞的分融判据

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中图分类号：0313.4 文献标志码：A 文章编号：1000-582X（2025）12-049-11

Abstract：This study investigates the influence of droplet velocityon the collsion behavior of equal-sized binary water droplets impacting head-on on a superhydrophobic surface.Using a high-speed camera，the dynamic process of dropletcollision process was recorded，anda theoretical model was developed to describe the critical conditions governing post-colision coalescence or bouncing.The model accurately predicts the critical velocity that determines whether droplets coalesce or rebound after collision.Experimental results show that as droplet velocity increases，the probabilityof coalescence also increases，while larger droplet diameters correspond to lower criticalvelocities forthecoalescence-bouncingtransition.During thedeformation stage ofcollsion，internal pressure within the droplets may exceed the surface tension threshold，resulting in coalescence.The proposed theoretical model demonstrates strong agreement with experimental observations and can effectively predict droplet behavior at various velocities.This provides a theoretical basis for controlling droplet collsion dynamics， with potential applications in droplet manipulation，sensing，and microreactor technologies.

Keywords： droplet colision; superhydrophobic; critical condition

液滴碰撞行为是日常生活和工业生产中的常见现象，在液滴动力学和表面科学领域引起了诸多学者的关注。（剩余11280字）