Skating on a film of air: drops impacting on a surface.
John Martin Kolinski,Shmuel M. Rubinstein,Shreyas Mandre,Michael Brenner,David A. Weitz,Lakshminarayanan Mahadevan +5 more
TLDR
The results show that the dynamics of impacting drops are much more complex than previously thought, with a rich array of unexpected phenomena that require rethinking classic paradigms.Abstract:
The commonly accepted description of drops impacting on a surface typically ignores the essential role of the air that is trapped between the impacting drop and the surface. Here we describe a new imaging modality that is sensitive to the behavior right at the surface. We show that a very thin film of air, only a few tens of nanometers thick, remains trapped between the falling drop and the surface as the drop spreads. The thin film of air serves to lubricate the drop enabling the fluid to skate on the air film laterally outward at surprisingly high velocities, consistent with theoretical predictions. Eventually this thin film of air breaks down as the fluid wets the surface via a spinodal-like mechanism. Our results show that the dynamics of impacting drops are much more complex than previously thought, with a rich array of unexpected phenomena that require rethinking classic paradigms.read more
Citations
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Journal ArticleDOI
Drop Impact on a Solid Surface
TL;DR: In this article, the authors focus on recent experimental and theoretical studies, which aim at unraveling the underlying physics, characterized by the delicate interplay of liquid inertia, viscosity, and surface tension, but also the surrounding gas.
Journal of Fluid Mechanics创刊50周年
TL;DR: The mysterious rattleback and its fluid counterpart：Developments in shear instabilities（Patrick Huerre，Falling clouds＋Elisabeth Guazzelli）ＬEcotectural fluid mechanics％Herbert Huppert ）
Journal ArticleDOI
Superhydrophobic-like tunable droplet bouncing on slippery liquid interfaces
Chonglei Hao,Jing Li,Yuan Liu,Xiaofeng Zhou,Yahua Liu,Rong Liu,Lufeng Che,Wenzhong Zhou,Dong Sun,Lawrence Li,Lei Xu,Zuankai Wang +11 more
TL;DR: It is demonstrated that the manifestation of such a superhydrophobic-like bouncing necessitates an intricate interplay between the Weber number, the thickness and viscosity of liquid film, and the restitution coefficient independent of underlying liquid film.
Journal ArticleDOI
Wettability-independent bouncing on flat surfaces mediated by thin air films
TL;DR: In this paper, a different universal bouncing mechanism that occurs on both wetting and non-wetting flat surfaces for both high and low surface tension liquids was reported. But the authors focused on superhydrophobic surfaces with specific surface structures enabling drop bouncing with reduced contact time.
References
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BookDOI
Capillarity and Wetting Phenomena
TL;DR: The first € price and the £ and $ price are net prices, subject to local VAT as discussed by the authors, and prices and other details are subject to change without notice. All errors and omissions excepted.
Journal ArticleDOI
Drop Impact Dynamics: Splashing, Spreading, Receding, Bouncing ...
TL;DR: In this article, a review deals with drop impacts on thin liquid layers and dry surfaces, referred to as splashing, and their propagation is discussed in detail, as well as some additional kindred, albeit nonsplashing, phenomena like drop spreading and deposition, receding (recoil), jetting, fingering, and rebound.
Book
Capillarity and Wetting Phenomena: Drops, Bubbles, Pearls, Waves
TL;DR: Capillarity: Unconstrained Interfaces / Capillarity and gravity / Hysteresis and Elasticity of Triple Lines / Wetting and Long-Range Forces b/ Hydrodynamics of Interfaces -- Thin Films, Waves, and Ripples as discussed by the authors.
Journal ArticleDOI
Dewetting of thin polymer films
TL;DR: The influence of the film thickness on this process is investigated and compared to recent theoretical predictions of spinodal decomposition of partially wetting thin films.