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Author: José María Montanero Publisher: Springer ISBN: 9783031527678 Category : Technology & Engineering Languages : en Pages : 0
Book Description
This book comprehensively describes the tip streaming in simple fluids and those containing surfactants and polymeric molecules. It summarizes the theoretical models and approximations commonly adopted to analyze this phenomenon. It provides relevant experimental results and presents the scaling laws for rationalizing those results. The stability of the flows leading to tip streaming is analyzed theoretically and experimentally. Attention is paid to the effects of surfactant monolayers and viscoelasticity, including solutocapillarity, interfacial elasticity, surface viscosity, and extensional thickening caused by the polymer coil-stretch transition. It also offers an overall perspective of the numerous technological applications of the tip-streaming phenomenon. Remarkable examples are the production of microemulsions and microencapsulation of active agents for the food and pharmacy industries, the atomization of charged liquids for analytical chemistry, and the ejection of ultra-fast and ultra-thin jets for crystallography. Physical mechanisms responsible for the onset of tip streaming driven by hydrodynamic and electrohydrodynamic forces are described. Relevant theoretical and experimental results of the periodic microdripping and continuous microjetting modes of tip streaming produced with microfluidic configurations such as electrospray, flow focusing, coflowing, and selective withdrawal are discussed. The physical mechanisms responsible for the instability of the microjetting mode are studied in detail. The book collects the scaling laws used to predict the outcome of the microfluidic configurations mentioned above. The author combines state-of-the-art experimental results and linear stability analysis to identify the instability mechanisms limiting the applicability of the above-mentioned microfluidic configurations. In this way, the book connects experimental observations with fundamental aspects of tip streaming, bridging the microfluidic and fluid dynamicist communities. The connection between results obtained from the theoretical and experimental approaches will help experimentalists to understand the fundamental aspects of their practical problems. A useful guide for researchers working on hydrodynamic focusing and electrospray.
Author: Pengtao Yue Publisher: MDPI ISBN: 3039282964 Category : Technology & Engineering Languages : en Pages : 142
Book Description
The presence of drops, bubbles, and particles affects the behavior and response of complex multiphase fluids. In many applications, these complex fluids have more than one non-Newtonian component, e.g., polymer melts, liquid crystals, and blood plasma. In fact, most fluids exhibit non-Newtonian behaviors, such as yield stress, viscoelastity, viscoplasticity, shear thinning, or shear thickening, under certain flow conditions. Even in the complex fluids composed of Newtonian components, the coupling between different components and the evolution of internal boundaries often lead to a complex rheology. Thus the dynamics of drops, bubbles, and particles in both Newtonian fluids and non-Newtonian fluids are crucial to the understanding of the macroscopic behavior of complex fluids. This Special Issue aims to gather a wide variety of papers that focus on drop, bubble and particle dynamics in complex fluids. Potential topics include, but are not limited to, drop deformation, rising drops, pair-wise drop interactions, drop migration in channel flows, and the interaction of particles with flow systems such as pastes and slurries, glasses, suspensions, and emulsions. We emphasize numerical simulations, but also welcome experimental and theoretical contributions.
Author: Jerôme Bibette Publisher: Springer ISBN: 3540708200 Category : Technology & Engineering Languages : en Pages : 148
Book Description
Emulsions occur either as end products or during the processing of products in a huge range of areas including the food, agrochemical, pharmaceuticals, paints and oil industries. As end products, emulsions allow to avoid organic solvent in processing hydrophobic coatings. Emulsion technology is a suitable approach to vehicle viscous phases. It is also a remarkable mean of targeting actives or capturing specific species. The range of applications of emulsions progresses and their manufacturing becomes more and more sophisticated. Besides this broad domain of technological interest, emulsions are raising a variety of fundamental questions at the frontier between physic and chem istry. Indeed, as a class of soft colloidal materials, emulsions science is linked to various aspects of these disciplines: phase transitions, surface forces and wetting, metastability and hydrodynamic instabilities, mechanical properties and flow. The aim of this book is to review the main important concepts governing emulsion science. In Chapter 2, repulsive interactions between liquid films are discussed as well as adhesive interaction related to wetting. In Chap ter 3, consequences of weak and strong attractions are presented, related to the well accepted liquid solid transition analogy. In Chapter 4, the basics of both bulk compressibility and shear elasticity are presented, the role of disorder being the most important aspect of the elastic behavior of these soft systems. In Chapter 5 the central question of the emulsion lifetime related to metastability is discussed.
Author: Fernando Leal-Calderon Publisher: Springer Science & Business Media ISBN: 0387396837 Category : Science Languages : en Pages : 237
Book Description
This book gives an overview of the most recent advances in emulsion science, from the preparation to the destruction of these materials. This book is intended for a large audience, from undergraduate students to senior scientists. A progressive and didactic approach is proposed for that purpose. The concepts presented should provide a useful guidance for formulating and controlling the lifetime of emulsion at laboratory and industrial scales. For easy comprehension, the text is illustrated by more than 70 figures. This book is a new edition of the one published in the series "Springer Tracts in Modern Physics (vol. 181)". The main difference is a more didactic approach which will allow the non-specialist reader to capture the essential concepts. We shall also incorporate the very last research results (solid-stabilized emulsions, metastability) and novel applications (Biotechnology).
Author: Mohammad Taeibi Rahni Publisher: CRC Press ISBN: 1498722091 Category : Science Languages : en Pages : 549
Book Description
Computational Methods for Complex Liquid-Fluid Interfaces highlights key computational challenges involved in the two-way coupling of complex liquid-fluid interfaces. The book covers a variety of cutting-edge experimental and computational techniques ranging from macro- to meso- and microscale approaches (including pivotal applications). As example
Author: Graham Arthurs Publisher: Cambridge University Press ISBN: 1107618320 Category : Medical Languages : en Pages : 375
Book Description
This up-to-date, revised edition on ultrasound in anesthesia has now been expanded to cover the important areas of pain management and critical care, and includes the new Royal College of Anaesthetists' guidelines for using ultrasound in anesthesia and intensive care. A comprehensive, practical guide, it explains the benefits of ultrasound for all essential practices, ranging from vascular access and local anesthetic blocks in adults and children, to cardiac assessment, trauma and intensive care practice, pain management and more. Additional resources cover over 100 still and video clips, allowing the reader to view ultrasound sequences while reading the relevant chapter. Written by ultrasound experts, this is the perfect introductory text for medical consultants and any trainee or medical student who needs a step-by-step guide to how ultrasound works, how to use it themselves, how to get the best images and when to ask a sonographer for help.
Author: Barry A. Morris Publisher: William Andrew ISBN: 0323855741 Category : Technology & Engineering Languages : en Pages : 846
Book Description
The Science and Technology of Flexible Packaging: Multilayer Films from Resin and Process to End Use, Second Edition provides a comprehensive guide on plastic films in flexible packaging, covering scientific principles, materials properties, processes and end use considerations. Sections discuss the science of multilayer films in a concise and impactful way, presenting the fundamental understanding required to improve product design, material selection and processes. In addition, the book includes information on why one material is favored over another and how film or coating affects material properties. Descriptions and analysis of key properties of packaging films are provided from engineering and scientific perspectives. With essential scientific insights, best practice techniques, environmental sustainability information and key principles of structure design, this book provides information aids in material selection and processing, how to shorten development times and deliver stronger products, and ways to enable engineers and scientists to deliver superior products with reduced development time and cost. Provides essential information on all aspects of multilayer films in flexible packaging, including processing, properties, materials and end use Bridges the gap between scientific principles and practical challenges Includes explanations to assist practitioners in overcoming challenges Enables the reader to address new challenges, such as design for sustainability and eCommerce
Author: Jean-Louis Barrat Publisher: Cambridge University Press ISBN: 9780521783446 Category : Science Languages : en Pages : 308
Book Description
Presenting a unified approach, this book focuses on the theoretical concepts and methods necessary for understanding the physics and chemistry of the fluid state. Important ideas are presented concisely and illustrated with examples from simple molecular liquids and more complex soft condensed matter systems such as polymers, colloids, and liquid crystals.
Author: Robert Sobel Publisher: Academic Press ISBN: 0128225300 Category : Technology & Engineering Languages : en Pages : 626
Book Description
Microencapsulation in the Food Industry: A Practical Implementation Guide, Second Edition continues to focus on the development of new microencapsulation techniques for researchers and scientists in the field. This practical reference combines the knowledge of new and novel processing techniques, materials and selection, regulatory aspects and testing and evaluation of materials. It provides application specific uses of microencapsulation as it applies to the food and nutraceutical industries. This reference offers unique solutions to some very specific product needs in the field of encapsulation. This second edition highlights changes in the industry as a result of a field that has traversed from the micro scale level to nano-scaled encapsulation and includes two new chapters, one on regulatory, quality, process scale-up, packaging, and economics and the other on testing and quality control. Includes new characterization methodologies to understand chemical and physical properties for functionality of the final microencapsulated material Presents the latest research and developments in the area of nano-scale encapsulation and intelligent packaging Provides new testing tools to assess products containing microencapsulated actives