File Name: capillarity and wetting phenomena de gennes file.zip
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Early morning light forms tiny rainbows as it passes through the beads of dew strung along the filaments composing your hard-earned handiwork. Why beads? What happened to the water in between each drop? To answer this question, our eight-legged intellectual must first gain an understanding of how liquids such as water actually wet surfaces and why such liquids fail to wet other surfaces.
In this paper, we systematically investigate the static wetting behavior of a liquid ring in a cylindrical capillary tube. We obtain analytical solutions of the axisymmetric Young—Laplace equation for arbitrary contact angles. We find that, for specific values of the contact angle and the volume of the liquid ring, two solutions of the Young—Laplace equation exist, but only the one with the lower value of the total interfacial energy corresponds to a stable configuration. Based on a numerical scheme determining configurations with a local minimum of the interfacial energy, we also discuss the stability limit between axisymmetric rings and non-axisymmetric configurations. Beyond the stable regime, a liquid plug or a sessile droplet exists instead of a liquid ring, depending on the values of the liquid volume and the contact angle. The stability limit is characterized by specific critical parameters such as the liquid volume, throat diameter, etc. The results are presented in terms of a map showing the different stable liquid morphologies that are obtained from an axisymmetric ring as base state.
Report Download. Pierre-Gilles de Gennes. All rights reserved. Use in connection with any form of information stor- age and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now know or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks and similar terms, even if the are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. As I glance out my window in the early morning, I can see beads of droplets gracing a spider web.
Haynes ManualsThe Haynes What is offered here is not a comprehensive review of the latest research but rather a compendium of principles designed for the undergraduate student and for readers interested in the physics underlying these phenomena. Categories: Physics Thermodynamics and Statistical Mechanics. Publisher : Springer. File Info : pdf 8 Mb. No Comments Jan 29,
Author: Pierre-Gilles de Gennes, Francoise Brochard-Wyart, David Quere. Description:The study of capillarity is in the midst of a veritable.
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The wettability of droplets on a low surface energy solid is evaluated experimentally and theoretically. Water-ethanol binary mixture drops of several volumes are used. In the experiment, the droplet radius, height, and contact angle are measured. Analytical equations are derived that incorporate the effect of gravity for the relationships between the droplet radius and height, radius and contact angle, and radius and liquid surface energy. All the analytical equations display good agreement with the experimental data.
Women in Science: Materials View all 34 Articles. This work consists in an experimental investigation of forced dynamic wetting of molten polymers on cellulosic substrates and an estimation of models describing this dynamic. A previous work of Pucci et al. For lower Ca , a change in the dynamic wetting behavior was observed.
Currently, she is a professor of theoretical soft matter physics at the Curie Institute. She obtained her PhD in In she was made a professor of physical chemistry at Pierre-and-Marie-Curie University. Here she focused her research on phenomena involving mixing and on the physics of Interfaces. In she joined the Curie Institute and began research on biophysics. She is a member of Institut Universitaire de France.
bubbles pearls. capillarity and wetting phenomena de gennes pdf. capillarity and wetting fundamentals of surface tension wettability. capillarity and wetting.
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Capillarity and wetting phenomena: drops, bubbles, pearls, waves, Author: Pierre-Gilles de Gennes; Francoise Brochard-Wyart; David Quere. Categories: Chemistry File Info: pdf 21 Mb.