液滴撞击锥体的界面模态演化分析
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O 359

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国家自然科学基金资助项目(12572278);上海市白玉兰人才计划浦江项目(23PJD070)


Interfacial modal evolution analysis of a droplet impacting a cone
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    摘要:

    开展自然界和工业应用中广泛存在的液滴撞击尖端凸起结构的界面演化现象研究具有重要意义。采用实验和数值模拟相结合的方法研究了液滴撞击超疏水圆锥体过程中界面的动态演化,重点研究了韦伯数We和锥角α对液滴在圆锥体表面的模态演化的影响,并结合速度场和压力场分析了模态切换的原因。研究发现,随着We的增大,液滴冲击圆锥体时会依次出现4种模态:未被刺穿且完全反弹;刺穿形成环状后完全反弹;刺穿形成环状,在回缩的过程中发生破碎;刺穿形成环状,在铺展过程中发生破碎。此外,随着α的增大,发现不同模态间切换的临界We逐渐增大。本研究工作不仅增强了对液滴在复杂表面上冲击行为的理解,而且可为指导相关工程应用提供重要参考。

    Abstract:

    It is of great significance to carry out the interfacial evolution phenomenon of droplets impacting tip-raised structures, which is widely existing in nature and industrial applications. The dynamic evolution of the interface during droplet impact on superhydrophobic cone was investigated by combining experiments and numerical simulations, focusing on the effects of Weber number We and cone angle α on the modal evolution of the droplet on the surface of the cone, and the reasons for the mode switching were analyzed in the context of the velocity field and pressure field. The research finds that as We increases, four modes will occur successively when the droplet impacts the cone: unpunctured and completely rebound; punctured to form a ring and then completely rebound; punctured to form a ring and shattered in the process of retraction; punctured to form a ring and shattered in the process of spreading. Furthermore, as α increases, it is found that the critical We for switching between different modes gradually increases. This research work not only enhances the understanding of the impact behavior of droplets on complex surfaces, but also provides an important reference for guiding related engineering applications.

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吕明阳,朱兵.液滴撞击锥体的界面模态演化分析[J].上海理工大学学报,2026,48(2):129-139.

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  • 收稿日期:2025-01-01
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  • 在线发布日期: 2026-05-11
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