Wetting Of Underliquid Systems
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Wetting Of Underliquid Systems
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Author : Kumari Trinavee
language : en
Publisher:
Release Date : 2019
Wetting Of Underliquid Systems written by Kumari Trinavee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Computational fluid dynamics categories.
Wetting studies can be tracked back over the last few decades due to its applications in the development of water repellent (superhydrophobic), oil repellent (superoleophobic) surfaces. Despite the fact that these surfaces are well explored for air medium (inviscid), still the subject remains an emerging and challenging field due to the dearth of fundamental studies of wetting in surrounding viscous medium. Analyzing the interaction of a liquid droplet with a surface when kept in another liquid medium is vital for evolving applications in aquatic environment, oil-spillage, designing functional interfaces etc. The present study identifies and addresses a systematic study of two different underliquid systems : oil (drop) in water (surrounding medium) and water (drop) in oil (surrounding medium) with two different substrates viz., Poly (methyl methacrylate) PMMA and glass. Conventional theories namely, Young's equation and Owens-Wendt approach were corroborated with experimentally observed results. It was found that that experimental values vary largely with the conventional theoretical model for water (drop) in oil (viscous surrounding medium) on PMMA substrate. However, oil (drop) in water medium on PMMA substrate do not show such an anomaly. Therefore we hypothesized that a thin oil-film is sandwiched between water drop and substrate. Accordingly, we presented a modified theoretical model of Young's equation considering a thin oil film beneath the water drop originating from surrounding viscous medium. On the other hand, the standard Young's equation do not translate to the underliquid systems on a glass substrate. Also, Owens-Wendt theory could not correctly predict the underliquid contact angles on glass. Therefore similar to PMMA, we hypothesize that a thin oil film is present beneath the water drop on glass substrate. However, the modified Young's equation with thin-film consideration agrees very well with the experimental values and thereby demonstrated the presence of a thin film between a drop and glass substrate originating from the surrounding viscous medium.
Under Liquid Wetting Dynamics
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Author : Surjyasish Mitra
language : en
Publisher:
Release Date : 2016
Under Liquid Wetting Dynamics written by Surjyasish Mitra and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Liquid drops wetting a surface kept in ambient air has been widely studied over the last few decades due to its manifold applications in technology and industry. However, for a surface kept submerged under-liquid, such wetting processes have been studied to a lesser extent. Understanding how a liquid drop interacts with a surface in the presence of another liquid medium is pivotal towards growing applications in marine ecosystem, environmental effects of oil-spills, advanced manufacturing techniques like immersion lithography, etc. It also poses the challenging issues of liquid-liquid displacement and contact line dynamics. The present study delineated some fundamentals of under-liquid wettability like coalescence of two sessile drops on an under-liquid substrate, spreading of liquid drops on an underliquid substrate and drop interaction with submerged micro-patterned substrates.Through relevant theoretical analysis as well as experimentation, it was found that the existing theories of drop interaction with a surface in air are inadequate when a surrounding liquid medium is considered, and needs to be modified bringing into effect key parameters of the surrounding medium, such as its density and viscosity. Consideration of a surrounding liquid medium also allows to provide a unifying framework to study such wetting processes. For coalescence and spreading, a universal behavior was observed in terms of the initial fast wetting regime inherent to such processes, and the notion of coalescence-spreading analogy was found acceptable to describe such phenomenon. However, for under-liquid wetting signature of micro-patterned substrates, a non-universal behavior was observed which indicates the need of newer theoretical approach to better understand wetting phenomenon on such under-liquid surfaces.
Wettability
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Author : John Berg
language : en
Publisher: CRC Press
Release Date : 1993-04-20
Wettability written by John Berg and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-04-20 with Science categories.
Presents current knowledge of intermolecular interactions, the dynamics of wetting and the importance of wettability phenomena in processes and products, detailing the considerations required for wettability in multicomponent systems. Underlying theory and experimental methods are described.
Wetting Theory And Experiments Two Volume Set
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Author : Eli Ruckenstein
language : en
Publisher: CRC Press
Release Date : 2019-12-17
Wetting Theory And Experiments Two Volume Set written by Eli Ruckenstein and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-12-17 with Science categories.
Wetting: Theory and Experiments collates papers published by Professor Eli Ruckenstein and his coworkers on the theoretical and experimental investigation of wetting of solid surfaces. It contains six chapters, each of which is preceded by a short introduction. The papers are selected according to the specific features being considered and they are arranged in logical rather than chronological order. The book focuses on wetting on the nanoscale (nanodrops on solid surfaces, liquid in the nanoslit) considered on the basis of microscopic density functional theory and to dynamics of fluid on the solid surface considered on the basis of hydrodynamic equations. Along with this, experimental studies of wetting related to various applications are presented.
Modern Approaches To Wettability
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Author : G.I. Loeb
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Modern Approaches To Wettability written by G.I. Loeb and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
Striking a balance between applied and theoretical research, this work details many of the uses of wettability and interprets experimental data from a variety of viewpoints, including the 'separation of forces' and the 'equation of state approaches.'
Dynamic Wetting Dewetting Processes In Complex Liquid Solid Systems
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Author :
language : en
Publisher:
Release Date :
Dynamic Wetting Dewetting Processes In Complex Liquid Solid Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
In this thesis, the phenomenon of a microdrop impacting onto and spreading over surfaces of constant and variable wettability is investigated. The study is motivated by wide-ranging industrial applications of ink-jet printing technologies, in particular used by our industrial sponsor Kodak Ltd. Mathematical models for dynamic wetting phenomena are incorporated into a specially developed finite element based numerical platform. By examining different models, it was found for the first time that the interface formation model is capable of describing the experimentally observed non-uniqueness of the relationship between the contact-line speed and the dynamic contact angle. It is shown that, the interface formation model naturally captures the effect which variations in the wettability of the solid surface have on an adjacent flow, so that the model can be used, without any ad-hoc alterations, to consider the spreading of microdrops on such solids. An investigation of the effect that variation of the model's parameters has on the characteristics of the impact and spreading of microdrops has been carried out.
Wetting Experiments
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Author : Eli Ruckenstein
language : en
Publisher: CRC Press
Release Date : 2018-11-14
Wetting Experiments written by Eli Ruckenstein and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-14 with Science categories.
Wetting Experiments contains experimental wetting studies related to biological problems, polymers, and catalysts. An understanding of wetting is important for numerous practical applications, such as preparing self-cleaning surfaces, manufacturing artificial blood vessels, and developing new lubricants and nonadhesive dishes. As part of Wetting: Theory and Experiments, Two-Volume Set, this volume provides new insights into wetting experiments and fills a need not addressed by other books. Biology-related studies are devoted to the problem synthetic materials selection for use in biological media. Polymers are examined to estimate various surface characteristics, such as the ability of polymeric solids to alter their surface structures between different environments to minimize their interfacial free energy. Aimed at engineers, physical scientists, and materials scientists, this volume addresses the key areas of wetting, providing insights valuable to the field.
Wetting Front Instability In An Oil Water System
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Author : David Glenn Chandler
language : en
Publisher:
Release Date : 1995
Wetting Front Instability In An Oil Water System written by David Glenn Chandler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Wettability
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Author : Erle C. Donaldson
language : en
Publisher: Gulf Publishing Company
Release Date : 2008-07
Wettability written by Erle C. Donaldson and has been published by Gulf Publishing Company this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-07 with Technology & Engineering categories.
&Quot;The wettability of oil reservoirs is the most important factor controlling the rate of oil recovery, providing a profound effect on petroleum production. The petroleum industry has increased the research effort on wettability, but, so far, there has never been a comprehensive book on the topic. This is the first book to go through all of the major research and applications on wettability. This book will prepare the professional, and academic, engineer for the challenges facing the oil and gas production characteristics of petroleum reservoirs."--BOOK JACKET.
Dynamic Wetting Dewetting Processes In Complex Liquid Solid Systems
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Author : James Edward Sprittles
language : en
Publisher:
Release Date : 2010
Dynamic Wetting Dewetting Processes In Complex Liquid Solid Systems written by James Edward Sprittles and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.