Journal ArticleDOI
Liquid drop splashing on smooth, rough, and textured surfaces.
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TLDR
Experimental studies of how the splash depends on the roughness and the texture of the surfaces as well as the viscosity of the liquid are reported.Abstract:
Splashing occurs when a liquid drop hits a dry solid surface at high velocity. We report experimental studies of how the splash depends on the roughness and the texture of the surfaces as well as the viscosity of the liquid. For smooth surfaces, there is a "corona" splash caused by the presence of air surrounding the drop. There are several regimes that occur as the velocity and liquid viscosity are varied. There is also a "prompt" splash that depends on the roughness and texture of the surfaces. A measurement of the size distribution of the ejected droplets is sensitive to the surface roughness. For a textured surface in which pillars are arranged in a square lattice, experiment shows that the splashing has a fourfold symmetry. The splash occurs predominantly along the diagonal directions. In this geometry, two factors affect splashing the most: the pillar height and spacing between pillars.read more
Citations
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Drop impact upon micro- and nanostructured superhydrophobic surfaces
TL;DR: In this article, the authors investigate drop impact dynamics on different superhydrophobic surfaces, consisting of regular polymeric micropatterns and rough carbon nanofibers, with similar static contact angles.
Journal ArticleDOI
Drop collisions with simple and complex surfaces
TL;DR: In this paper, the authors comprehensively review the present level of understanding for such impact situations, by considering effects introduced by morphological changes to the surface and by changes of the wettability.
Journal ArticleDOI
Numerical Simulations of Flows with Moving Contact Lines
TL;DR: The main models for moving contact lines are summarized and an overview of computational methods that includes direct continuum approaches and macroscale models that resolve only the large-scale flow by modeling the effects of the conditions near the contact line using theory are presented.
Numerical simulations of 3D flows with moving contact lines
TL;DR: In this article, the authors summarize the main models for moving contact lines and follow with an overview of computational methods that include direct continuum approaches and macroscale models that resolve only the large-scale flow by modeling the effects of the conditions near the contact line using theory.
Journal ArticleDOI
A comparative study of droplet impact dynamics on a dual-scaled superhydrophobic surface and lotus leaf
TL;DR: In this paper, the impact dynamics of water droplets on an artificial dual-scaled superhydrophobic surface was studied and compared with that of a lotus leaf with impact velocity V up to 3 m/s.
References
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Journal ArticleDOI
The Instability of Liquid Surfaces when Accelerated in a Direction Perpendicular to their Planes. I
TL;DR: In this article, it was shown that when two superposed fluids of different densities are accelerated in a direction perpendicular to their interface, this surface is stable or unstable according to whether the acceleration is directed from the heavier to the lighter fluid or vice versa.
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
Elementary Fluid Dynamics
TL;DR: The Navier-Stokes equations of very viscous flow Boundary layers Instability Appendix hints and answers for exercises Bibliography Index as mentioned in this paper and references are given in Table 1.
Journal ArticleDOI
Droplet-wall collisions: Experimental studies of the deformation and breakup process
TL;DR: In this article, a model of the deposition-splashing boundary in terms of Reynolds number and Ohnesorge number is presented, which is only achieved if the normal velocity component of the impinging droplets is used in these dimensionless numbers.
Journal ArticleDOI
An overview of Rayleigh-Taylor instability☆
TL;DR: In this article, the authors survey Rayleigh-Taylor instability, describing the phenomenology that occurs at a Taylor unstable interface, and reviewing attempts to understand these phenomena quantitatively, and present a survey of the literature on Rayleigh Taylor instability.