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Droplet Wetting and Evaporation

Droplet Wetting and Evaporation
Author: David Brutin
Publisher: Academic Press
Total Pages: 464
Release: 2015-05-11
Genre: Science
ISBN: 0128008083
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Droplet Wetting and Evaporation provides engineers, students, and researchers with the first comprehensive guide to the theory and applications of droplet wetting and evaporation. Beginning with a relevant theoretical background, the book moves on to consider specific aspects, including heat transfer, flow instabilities, and the drying of complex fluid droplets. Each chapter covers the principles of the subject, addressing corresponding practical issues and problems. The text is ideal for a broad range of domains, from aerospace and materials, to biomedical applications, comprehensively relaying the challenges and approaches from the different communities leading the way in droplet research and development. Provides a broad, cross-subject coverage of theory and application that is ideal for engineers, students and researchers who need to follow all major developments in this interdisciplinary field Includes comprehensive discussions of heat transfer, flow instabilities, and the drying of complex fluid droplets Begins with an accessible summary of fundamental theory before moving on to specific areas such as heat transfer, flow instabilities, and the drying of complex fluid droplets

Microscale Surface Tension and Its Applications

Microscale Surface Tension and Its Applications
Author: Pierre Lambert
Publisher: MDPI
Total Pages: 240
Release: 2019-10-21
Genre: Technology & Engineering
ISBN: 3039215647
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Building on advances in miniaturization and soft matter, surface tension effects are a major key to the development of soft/fluidic microrobotics. Benefiting from scaling laws, surface tension and capillary effects can enable sensing, actuation, adhesion, confinement, compliance, and other structural and functional properties necessary in micro- and nanosystems. Various applications are under development: microfluidic and lab-on-chip devices, soft gripping and manipulation of particles, colloidal and interfacial assemblies, fluidic/droplet mechatronics. The capillary action is ubiquitous in drops, bubbles and menisci, opening a broad spectrum of technological solutions and scientific investigations. Identified grand challenges to the establishment of fluidic microrobotics include mastering the dynamics of capillary effects, controlling the hysteresis arising from wetting and evaporation, improving the dispensing and handling of tiny droplets, and developing a mechatronic approach for the control and programming of surface tension effects. In this Special Issue of Micromachines, we invite contributions covering all aspects of microscale engineering relying on surface tension. Particularly, we welcome contributions on fundamentals or applications related to: Drop-botics: fluidic or surface tension-based micro/nanorobotics: capillary manipulation, gripping, and actuation, sensing, folding, propulsion and bio-inspired solutions; Control of surface tension effects: surface tension gradients, active surfactants, thermocapillarity, electrowetting, elastocapillarity; Handling of droplets, bubbles and liquid bridges: dispensing, confinement, displacement, stretching, rupture, evaporation; Capillary forces: modelling, measurement, simulation; Interfacial engineering: smart liquids, surface treatments; Interfacial fluidic and capillary assembly of colloids and devices; Biological applications of surface tension, including lab-on-chip and organ-on-chip systems.

Electrowetting

Electrowetting
Author: Frieder Mugele
Publisher: John Wiley & Sons
Total Pages: 323
Release: 2019-04-29
Genre: Science
ISBN: 3527412298
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Starting from the basic principles of wetting, electrowetting and fluid dynamics all the way up to those engineering aspects relevant for the development of specific devices, this is a comprehensive introduction and overview of the theoretical and practical aspects. Written by two of the most knowledgeable experts in the field, the text covers both current as well as possible future applications, providing basic working principles of lab-on-a-chip devices and such optofluidic devices as adaptive lenses and optical switches. Furthermore, novel e-paper display technology, energy harvesting and supercapacitors as well as electrowetting in the nano-world are discussed. Finally, the book contains a series of exercises and questions for use in courses on microfluidics or electrowetting. With its all-encompassing scope, this book will equally serve the growing community of students and academic and industrial researchers as both an introduction and a standard reference.

Surface Wetting

Surface Wetting
Author: Kock-Yee Law
Publisher: Springer
Total Pages: 169
Release: 2015-11-18
Genre: Technology & Engineering
ISBN: 3319252143
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This book describes wetting fundamentals and reviews the standard protocol for contact angle measurements. The authors include a brief overview of applications of contact angle measurements in surface science and engineering. They also discuss recent advances and research trends in wetting fundamentals and include measurement techniques and data interpretation of contract angles.

The Surface Wettability Effect on Phase Change

The Surface Wettability Effect on Phase Change
Author: Marco Marengo
Publisher: Springer Nature
Total Pages: 390
Release: 2021-10-30
Genre: Science
ISBN: 3030829928
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The Surface Wettability Effect on Phase Change collects high level contributions from internationally recognised scientists in the field. It thoroughly explores surface wettability, with topics spanning from the physics of phase change, physics of nucleation, mesoscale modeling, analysis of phenomena such drop evaporation, boiling, local heat flux at triple line, Leidenfrost, dropwise condensation, heat transfer enhancement, freezing, icing. All the topics are treated by discussing experimental results, mathematical modeling and numerical simulations. In particular, the numerical methods look at direct numerical simulations in the framework of VOF simulations, phase-field simulations and molecular dynamics. An introduction to equilibrium and non-equilibrium thermodynamics of phase change, wetting phenomena, liquid interfaces, numerical simulation of wetting phenomena and phase change is offered for readers who are less familiar in the field. This book will be of interest to researchers, academics, engineers, and postgraduate students working in the area of thermofluids, thermal management, and surface technology.

Evaporation-induced Non-wetting Droplets on Superhydrophilic Surfaces

Evaporation-induced Non-wetting Droplets on Superhydrophilic Surfaces
Author: Solomon E. Adera
Publisher:
Total Pages: 68
Release: 2012
Genre:
ISBN:
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A droplet deposited on a rough, lyophilic surface satisfying the imbibition condition, results in spontaneous spreading and hence complete wetting. However, in this thesis, we demonstrate that this wetting behavior can be altered by superheating the substrate such that droplets can reside in a non-wetting state due to evaporation. Photolithography and deep reactive ion etching were used to fabricate well-defined silicon micropillar arrays with a square pattern with varying pillar diameter, height, and center-to-center spacing. Water droplets placed on these microstructured surfaces at room temperature demonstrated superhydrophilic behavior with liquid filling the voids between pillars resulting in very low contact angle, and hence complete wetting. However, when the microstructured surface was superheated above a critical superheat, the superhydrophilicity was lost and non-wetting droplets were formed on the top surface of the micropillar array structure. The superheat required to deposit a non-wetting droplet (> 75°C) was found to be significantly higher than that required to sustain an already deposited non-wetting droplet (

Soft Matter Physics

Soft Matter Physics
Author: Masao Doi
Publisher: Oxford University Press, USA
Total Pages: 271
Release: 2013-07-04
Genre: Science
ISBN: 0199652953
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Soft matter (polymers, colloids, surfactants, liquid crystals) are an important class of materials for modern and future technologies. They are complex materials that behave neither like a fluid nor a solid. This book describes the characteristics of such materials and how we can understand such characteristics in the language of physics.

Capillarity and Wetting Phenomena

Capillarity and Wetting Phenomena
Author: Pierre-Gilles de Gennes
Publisher: Springer Science & Business Media
Total Pages: 298
Release: 2013-03-20
Genre: Science
ISBN: 0387216561
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The study of capillarity is in the midst of a veritable explosion. 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.

Wetting and Evaporation Studies on Molecularly Modified Surfaces

Wetting and Evaporation Studies on Molecularly Modified Surfaces
Author: Dinah Michele Soolaman
Publisher:
Total Pages: 0
Release: 2007
Genre: Chemistry, Technical
ISBN:
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Wetting and evaporation of liquid microdroplets on solid surfaces are ubiquitous in nature. Two of the many important factors that influence how a droplet wets and "escapes", are the Chemical composition and Roughness of the solid surface. In order to gain a better understanding of these processes as a whole, a systematic study on the factors that influence wetting/evaporation behaviour, including the liquid ́s composition, the liquid-solid interface, and the substrate morphology has been carried out in this thesis. In particular, the evaporation profile and its correlation with the wetting hysteresis have been studied using both water and binary mixtures on self-assembled monolayer (SAM) surfaces. Based on surface modification with mixed SAMs in conjunction with microcontact printing and electrochemical deposition techniques, this work aims at a comprehensive and controlled study of how molecular/structural modification dictate the wetting and evaporation behaviour of microdroplets on the surface.