The Origin of Splashing: A Wind 10 Times Stronger

The Origin of Splashing: A Wind 10 Times Stronger
Date & Time: 
Friday, December 16, 2016 - 14:00 to 15:30
Lei Xu, Physics Department, The Chinese University of Hong Kong
Room 311, Pudong Campus | 1555 Century Avenue, Shanghai

Liquid drops always splash when they impact smooth surfaces with high enough speeds. This common phenomenon is crucial in many important fields such as agriculture, printing, surface coating, and spray cooling. However, despite extensive studies over one century, the origin of splashing remains a big mystery. Combining experiment with model, we show that the air trapped under the liquid drop forms a special flow within a nanoscale gap. This airflow produces a stress 10 times stronger than common wind and generates instabilities similar to water ripples that trigger splash. Our model agrees quantitatively with the experimental verifications and brings a fundamental understanding to the general phenomenon of drop splashing on smooth surfaces.


Seminar Series of the NYU-ECNU Institute of Physics at NYU Shanghai

Location & Details: 

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