The wetting properties of frosted glass

IF 1.2 Q3 PHYSICS, MULTIDISCIPLINARY

Papers in Physics Pub Date : 2021-12-01 DOI:10.4279/pip.130006

S. Dorbolo

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引用次数: 1

Abstract

Frosted glass is a common, low cost material. Its roughness can be used to control how it is wet by water. In this paper, the wetting properties of silicone oil and water are investigated. For the oil, wetting is total since the oleophilic character of the glass is enhanced by its roughness. Due to the remarkable optical properties of frosted glass, the spreading of oil droplets on its surface was recorded over three months. Frosted glass is a parahydrophilic surface because of its large contact angle hysteresis (up to 80° ). The behaviour of oil and water droplets was compared on a long piece of inclined frosted glass. The trajectories (and the spreading) of the droplets were studied and phenomenological laws were deduced to describe the dependence of the droplet speed on the initial volume of the droplet and the angle of inclination. Such dependences of speed at long travel distances (100 times the capillary length) were deduced and rationalised with a simple model that takes into account the thickness of the wake. Moreover, we analysed the flow inside the wake of water droplets sliding on inclined frosted glass. Suggestions are given on how to exploit drainage of the water droplet wake and the high hysteresis of water within the framework of open microfluidics.

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磨砂玻璃的润湿性能

磨砂玻璃是一种常见的低成本材料。它的粗糙度可以用来控制它被水润湿的程度。本文研究了硅油和水的润湿性能。对于油，润湿是完全的，因为玻璃的亲油特性因其粗糙度而增强。由于磨砂玻璃具有显著的光学特性，在三个月的时间里，人们记录到了油滴在其表面的扩散。磨砂玻璃由于其大的接触角滞后（高达80°）而成为准亲水表面。在一块长的倾斜磨砂玻璃上比较了油滴和水滴的行为。研究了液滴的轨迹（和扩散），并推导了现象学定律来描述液滴速度对液滴初始体积和倾斜角度的依赖性。推导了长行程距离（毛细管长度的100倍）下速度的这种依赖性，并用一个考虑尾流厚度的简单模型对其进行了合理化。此外，我们还分析了水滴在倾斜磨砂玻璃上滑动的尾流内部的流动。对如何在开放微流体的框架内利用水滴尾流的排水和水的高滞后性提出了建议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Papers in Physics PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.90

自引率

0.00%

发文量

期刊介绍： Papers in Physics publishes original research in all areas of physics and its interface with other subjects. The scope includes, but is not limited to, physics of particles and fields, condensed matter, relativity and gravitation, nuclear physics, physics of fluids, biophysics, econophysics, chemical physics, statistical mechanics, soft condensed matter, materials science, mathematical physics and general physics. Contributions in the areas of foundations of physics, history of physics and physics education are not considered for publication. Articles published in Papers in Physics contain substantial new results and ideas that advance the state of physics in a non-trivial way. Articles are strictly reviewed by specialists prior to publication. Papers in Physics highlights outstanding articles published in the journal through the Editors'' choice section. Papers in Physics offers two distinct editorial treatments to articles from which authors can choose. In Traditional Review, manuscripts are submitted to anonymous reviewers seeking constructive criticism and editors make a decision on whether publication is appropriate. In Open Review, manuscripts are sent to reviewers. If the paper is considered original and technically sound, the article, the reviewer''s comments and the author''s reply are published alongside the names of all involved. This way, Papers in Physics promotes the open discussion of controversies among specialists that are of help to the reader and to the transparency of the editorial process. Moreover, our reviewers receive their due recognition by publishing a recorded citable report. Papers in Physics publishes Commentaries from the reviewer(s) if major disagreements remain after exchange with the authors or if a different insight proposed is considered valuable for the readers.