Drop Impact on a Solid Surface
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TLDR
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.Abstract:
A drop hitting a solid surface can deposit, bounce, or splash. Splashing arises from the breakup of a fine liquid sheet that is ejected radially along the substrate. Bouncing and deposition depend crucially on the wetting properties of the substrate. In this review, we focus on recent experimental and theoretical studies, which aim at unraveling the underlying physics, characterized by the delicate interplay of not only liquid inertia, viscosity, and surface tension, but also the surrounding gas. The gas cushions the initial contact; it is entrapped in a central microbubble on the substrate; and it promotes the so-called corona splash, by lifting the lamella away from the solid. Particular attention is paid to the influence of surface roughness, natural or engineered to enhance repellency, relevant in many applications.read more
Citations
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Drop Impact upon Micro- and Nanostructured Superhydrophobic Surfaces
TL;DR: The results imply that the multiscale surface roughness at nanoscale plays a minor role in the impact events for small The authors less than or approximately equal 120 but an important one for large They greater than or about equal 120.
Maximal deformation of an impacting drop
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References
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Experimental study of the impact of an ink-jet printed droplet on a solid substrate
TL;DR: In this paper, an experimental study of the impact of water droplets on a solid substrate, with a droplet radius between 18 and 42μm, was conducted, where the interface shape during impact was measured and the measured volume of the small bubble was compared with an approximate model based on air entrapment.
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Influence of Surface Roughness on Liquid Drop Impact
Kai Range,François Feuillebois +1 more
TL;DR: In this article, the impact of a drop on a rough solid surface is studied experimentally using a shadowgraph method with a rapid CCD camera system, and the experimental results for the onset of splashing on rough surfaces agree with those of Stow and Hadfield (1).
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Retraction dynamics of aqueous drops upon impact on non-wetting surfaces
TL;DR: In this paper, the impact and subsequent retraction of liquid droplets upon high-speed impact on hydrophobic surfaces were studied and extensive experiments showed that the drop retraction rate is a material constant and does not depend on the impact velocity.
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On the maximum spreading diameter of impacting droplets on well-prepared solid surfaces.
Chijioke Ukiwe,Daniel Y. Kwok +1 more
TL;DR: This paper presents a systematic study of liquid droplet impact on three polymer surfaces: poly( methyl methacrylate), poly(methyl methacylate/n-butyl methacRYlate), and poly(n- butyl methACrylate) and modified the model of Pasandideh-Fard et al.
Journal Article
Drop impact on superheated surfaces
TL;DR: It is shown that the dimensionless maximum spreading γ of impacting droplets on the heated surfaces in both gentle and spraying film boiling regimes shows a universal scaling with the Weber number The authors, which is much steeper than for the impact on nonheated (hydrophilic or hydrophobic) surfaces.