2026-10-07T23:20:58Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34003128 2026-09-26T14:16:38Z category_146 category_915 category_7 category_16 category_873 category_45 category_69 category_132 portal_63 item_type_2 month_year_09_2026

Fast Droplet Shedding via Aerodynamic Ratchet on a Moving Surface Xuezhi Qin (23115160) Ran Tao (81449) Xiong Wang (384462) Bingqiang Ji (5641031) Chenyang Wu (5796467) Yong Hu (171926) Zuankai Wang (1596229) Jing Li (10611) Space Science Physical Sciences not elsewhere classified Medicine Physiology Chemical Sciences not elsewhere classified Sociology Inorganic Chemistry Infectious Diseases suppresses conventional retraction promotes early lift lubrication pressure generated including ice prevention entrained air layer approximately 65 %. approximately 25 %. advance fundamental understanding critical velocity separating low surface velocities critical surface velocity rapidly moving surface moving surface horizontal velocity surface chemistry moving surfaces two regimes turbine blades transition arises systematically investigated stationary surfaces speed systems scaling law rapid detachment quantitative framework pancake configuration impact dynamics extensively achieved erosion mitigation engineered surfaces energy harvesting contact time applications ranging aircraft engines The rapid detachment of liquid from engineered surfaces is significant to applications ranging from self-cleaning and energy harvesting to anti-icing. While droplet repellency on stationary surfaces has been extensively achieved through surface chemistry and micro/nanotexture, the impact dynamics of droplets on rapidly moving surfaces remains poorly understood. Here, we systematically investigated the interaction between droplets and a moving surface with a horizontal velocity up to 50 m/s, identifying two distinct bouncing regimes. At low surface velocities, droplets undergo asymmetric bouncing, leading to a modest contact time reduction of approximately 25%. Above a critical surface velocity, however, droplets detach in the pancake configuration, reducing the contact time by approximately 65%. This transition arises from the lubrication pressure generated by an entrained air layer between the droplet and the rapidly moving surface, which suppresses conventional retraction and promotes early lift-off. We develop a scaling law that predicts the critical velocity separating these two regimes, providing a quantitative framework for controlling droplet contact time on moving surfaces. These findings not only advance fundamental understanding of liquid–solid interactions on moving surfaces but also offer practical strategies for minimizing liquid–surface contact in high-speed systems, including ice prevention in aircraft engines and erosion mitigation in turbine blades. 2026-09-26T00:00:00Z Dataset Media 10.1021/acs.langmuir.6c03994.s003 https://figshare.com/articles/media/Fast_Droplet_Shedding_via_Aerodynamic_Ratchet_on_a_Moving_Surface/34003128 CC BY-NC 4.0