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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Journal ArticleDOI
A theory on the spreading of impacting droplets
TL;DR: In this article, a self-consistent analytical solution describing the unsteady flow in the thin film which is expelled radially outwards when a drop hits a dry solid wall is presented.
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Curvature effect on droplet impacting onto hydrophobic and superhydrophobic spheres
TL;DR: In this article, a detailed study of the impact of droplet impact on hydrophobic and super-hydrophobic solid surfaces is presented. But the wide range of the parameters affecting its outcome necessitate a thorough study to reveal th...
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The Effect of Surface Roughness on the Contact Line and Splashing Dynamics of Impacting Droplets.
TL;DR: It is found that this maximum dynamic contact angle, together with the liquid properties, the ratio of the peak to peak roughness and the surface feature mean width, determines the splashing to no-splashing threshold.
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Modelling the impact, spreading and freezing of a water droplet on horizontal and inclined superhydrophobic cooled surfaces
TL;DR: In this article, a three-dimensional model including an extended phase change method was developed on OpenFOAM platform to simulate the impact, spreading and freezing of a water droplet on a cooled solid substrate.
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Towards the shortest possible contact time: Droplet impact on cylindrical superhydrophobic surfaces structured with macro-scale features.
TL;DR: The data show that adding a wire to the peak of a cylinder containing both micro- and macro-scale roughness (wired ribbed-curved surfaces) yields the contact time even shorter than the inertial-capillary time scale, an unprecedented phenomenon.