Journal ArticleDOI
Maximal deformation of an impacting drop
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TLDR
In this article, the impact of a liquid drop of low viscosity on a super-hydrophobic surface was studied. But the authors focused on the effect of the drop on the spread of the liquid on the surface.Abstract:
We first study the impact of a liquid drop of low viscosity on a super-hydrophobic surface. Denoting the drop size and speed as are the liquid density and surface tension). This law is also observed to hold on partially wettable surfaces, provided that liquids of low viscosity (such as water) are used. The law is interpreted as resulting from the effective acceleration experienced by the drop during its impact. Viscous drops are also analysed, allowing us to propose a criterion for predicting if the spreading is limited by capillarity, or by viscosity.read more
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Droplet impact dynamics for two liquids impinging on anisotropic superhydrophobic surfaces
TL;DR: In this article, the influence of liquid viscosity, cavity fraction, and spreading direction, relative to the surface grooves, is explored qualitatively and quantitatively, including the maximum droplet spread diameter, velocity of the rebounding jet, and the time delay between droplet impact and jet emission.
Journal ArticleDOI
Droplet Bouncing and Breakup during Impact on a Microgrooved Surface.
TL;DR: In this article, the impact dynamics of a microliter water droplet on a hydrophobic microgrooved surface were investigated and the effect of the pitch of the grooved surface and Weber number on the droplet dynamics and impact outcome was studied.
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Dynamics of drop impact on solid surfaces: evolution of impact force and self-similar spreading
TL;DR: In this article, the authors investigated the dynamics of drop impacts on dry solid surfaces by synchronizing high-speed photography with fast force sensing, and simultaneously measured the temporal evolution of the shape and impact force of impacting drops over a wide range of Reynolds numbers.
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Uniform Spread of High-Speed Drops on Superhydrophobic Surface by Live-Oligomeric Surfactant Jamming
Siqi Luo,Zhidi Chen,Zhichao Dong,Yaxun Fan,Yao Chen,Bin Liu,Cunlong Yu,Chuxin Li,Haoyu Dai,Haofei Li,Yilin Wang,Lei Jiang +11 more
TL;DR: Uniform round drop spreading and high-resolution inkjet printing patterns are demonstrated on superhydrophobic surfaces without splash or rebound after high-speed impacting by introducing live-oligomeric surfactant adhesion.
Journal ArticleDOI
Drop spreading and penetration into pre-wetted powders
Jeremy Marston,James E. Sprittles,Ying Zhu,Erqiang Li,Ivan U. Vakarelski,Sigurdur T. Thoroddsen +5 more
TL;DR: In this article, an experimental study of the impact of liquid drops onto powder beds which are pre-wetted with the impacting liquid was conducted using high-speed video imaging, and the dynamics of the initial spreading regime and drainage times once the drop has reached its maximum spread on the surface were analyzed.