Journal article
Thin film instability driven dimple mode of air film failure during drop impact on smooth surfaces
Physical review fluids, v 6(4)
12 Apr 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Air film stability underneath a drop is crucial for drop contact dynamics upon impact. An unstable film leads to the drop contacting the surface and subsequent spreading or splashing. Apart from previously reported film and kink contact modes, here we present the experimental evidence for a dimple failure mode of an air film, driven by a thin film instability when a drop impacts onto an atomically smooth surface. The dimple failure occurs beyond the inertial-capillary timescale and is initiated when the dimple inverts at the drop's central axis. For the same impact Weber number, the dimple failure observed in low-viscosity drops is absent at a higher viscosity, due to damping of capillary waves.
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Details
- Title
- Thin film instability driven dimple mode of air film failure during drop impact on smooth surfaces
- Creators
- Lige Zhang - Drexel UniversityTejaswi Soori - Drexel UniversityArif Rokoni - Drexel UniversityAllison Kaminski - Drexel UniversityYing Sun - Drexel University
- Publication Details
- Physical review fluids, v 6(4)
- Publisher
- Amer Physical Soc
- Number of pages
- 11
- Grant note
- CBET-1705745 / US National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics; College of Engineering
- Web of Science ID
- WOS:000652858200001
- Scopus ID
- 2-s2.0-85104846900
- Other Identifier
- 991019167347904721
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- Web of Science research areas
- Physics, Fluids & Plasmas