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Controlling Drop Coalescence Using Nano Engineered Surfaces
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Book Synopsis Controlling Drop Coalescence Using Nano-engineered Surfaces by : Manuel Corral (Jr.)
Download or read book Controlling Drop Coalescence Using Nano-engineered Surfaces written by Manuel Corral (Jr.) and published by . This book was released on 2011 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamics of drop coalescence are explored on micro-scale surface features for the first time. Drop coalescence is defined as a process by which two or more droplets, bubbles or particles merge during contact to form a single droplet, bubble or particle. There are two regimes that limit the dynamics of drop coalescence of a liquid. The first is regime is limited by the viscosity of the droplets. The second regime is limited by inertial forces caused by the motion that merges the two droplets. Currently, much work has been done to study drop coalescence in a liquid-liquid environment and the phenomenon has been well defined and modeled. Previous work has been done to understand liquid-liquid drop coalescence using liquids with varying viscosity, but the effects of solid micro-textured surfaces on drop coalescence dynamics of low density liquids, such as water, have not yet been analyzed and quantified. Very little has been studied about drop coalescence in a solid-liquid-air interface. In this thesis, drop coalescence in its inertial regime will be defined in low viscosity liquid, water, on surfaces with varying wettability and micro-scale features. Surfaces include microstructures consisting of a regular array of square posts defined by the aspect ratio of the posts and the spacing between the posts. This work focuses on the development of a fundamental understanding and physical model of micro-scale surface texture effects on drop coalescence to provide aid in future surface design applications. These applications could allow for the controlling of this phenomenon to promote drop-wise condensation in order to increase efficiencies of condensers or to aid in water-oil separation procedures.
Book Synopsis Drop Dynamics and Dropwise Condensation on Textured Surfaces by : Sameer Khandekar
Download or read book Drop Dynamics and Dropwise Condensation on Textured Surfaces written by Sameer Khandekar and published by Springer Nature. This book was released on 2020-09-11 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an expanded form of the monograph, Dropwise Condensation on Inclined Textured Surfaces, Springer, 2013, published earlier by the authors, wherein a mathematical model for dropwise condensation of pure vapor over inclined textured surfaces was presented, followed by simulations and comparison with experiments. The model factored in several details of the overall quasi-cyclic process but approximated those at the scale of individual drops. In the last five years, drop level dynamics over hydrophobic surfaces have been extensively studied. These results can now be incorporated in the dropwise condensation model. Dropwise condensation is an efficient route to heat transfer and is often encountered in major power generation applications. Drops are also formed during condensation in distillation devices that work with diverse fluids ranging from water to liquid metals. Design of such equipment requires careful understanding of the condensation cycle, starting from the birth of nuclei, followed by molecular clusters, direct growth of droplets, their coalescence, all the way to instability and fall-off of condensed drops. The model described here considers these individual steps of the condensation cycle. Additional discussions include drop shape determination under static conditions, a fundamental study of drop spreading in sessile and pendant configurations, and the details of the drop coalescence phenomena. These are subsequently incorporated in the condensation model and their consequences are examined. As the mathematical model is spread over multiple scales of length and time, a parallelization approach to simulation is presented. Special topics include three-phase contact line modeling, surface preparation techniques, fundamentals of evaporation and evaporation rates of a single liquid drop, and measurement of heat transfer coefficient during large-scale condensation of water vapor. We hope that this significantly expanded text meets the expectations of design engineers, analysts, and researchers working in areas related to phase-change phenomena and heat transfer.
Book Synopsis Comprehensive Nanoscience and Nanotechnology by :
Download or read book Comprehensive Nanoscience and Nanotechnology written by and published by Academic Press. This book was released on 2019-01-02 with total page 1881 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Nanoscience and Technology, Second Edition, Five Volume Set allows researchers to navigate a very diverse, interdisciplinary and rapidly-changing field with up-to-date, comprehensive and authoritative coverage of every aspect of modern nanoscience and nanotechnology. Presents new chapters on the latest developments in the field Covers topics not discussed to this degree of detail in other works, such as biological devices and applications of nanotechnology Compiled and written by top international authorities in the field
Book Synopsis Tailoring Hydrodynamics of Non-wetting Droplets with Nano-engineered Surfaces by : Hyuk-Min Kwon
Download or read book Tailoring Hydrodynamics of Non-wetting Droplets with Nano-engineered Surfaces written by Hyuk-Min Kwon and published by . This book was released on 2013 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considering that contacts between liquid and solid are ubiquitous in almost all energy processes, including steam turbines, oil pumping, condensers and boilers, the efficiency of energy transportation can be maximized such that the liquid-solid interaction is optimized. Texture based super-hydrophobicity, also known as the Lotus effect, has been one of the most extensively studied topics in the last decade. Many of the recent studies have focused on how textures induce more water repellency, and how these textures can be manufactured with different methods and materials. However, few studies have shown how these surfaces benefit the real energy processes in which the interaction between liquid droplets and solid surfaces is vigorous and influences the energy transfer performances. This work focuses on altering the hydrodynamics of droplets with nano-engineered surfaces such that it enables a variety of energy transport processes to achieve better efficiency. Firstly, the wetting transition on textured super-hydrophobic surfaces is explored. The careful investigation of Cassie-Baxter to Wenzel transition of a pendant drop during the deposition explains that the rapid deceleration-induced water hammer pressure causes the transition. This new transition mechanism for large droplets enables a new wetting transition phase diagram with a previously known Laplace mechanism that explains the small drop transition. Another class of non-wetting droplet, the Leidenfrost drop, is studied with textured super-wetting surfaces. The liquid drop loses its contact to the solid by its own vapor, created by a large superheat from the solid. The Leidenfrost effect is undesirable in cooling applications as the vapor layer acts as a barrier for heat transfer. Here, it has been studied that how textured super-hydrophilic surfaces induce droplets to wet at higher superheat via capillary wicking compare to smooth surfaces. A physical model based on scaling is developed to predict the Leidenfrost drop on single length scale textures, and validated by the experiments. Additionally, the physical mechanism suggests that hierarchical textures have a higher Leidenfrost temperature compared to single-length-scale textures, confirmed experimentally. Lastly, the recently discovered rare-earth oxide ceramics are studied, which ensures the benefits of water repellency under harsh conditions such as high temperature and abrasive wear. Texturing of the rare-earth oxide ceramic is explored by the laser ablation technique. Unique micro- and nano-scale hierarchical textures are created, enhancing the water repellency, resulting in the super-hydrophobic rare-earth ceramic.
Book Synopsis Intensification of Liquid–Liquid Processes by : Laurence R. Weatherley
Download or read book Intensification of Liquid–Liquid Processes written by Laurence R. Weatherley and published by Cambridge University Press. This book was released on 2020-04-16 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore and review novel techniques for intensifying transport and reaction in liquid-liquid and related systems with this essential toolkit. Topics include discussion of the principles of process intensification, the nexus between process intensification and sustainable engineering, and the fundamentals of liquid-liquid contacting, from an expert with over forty-five years' experience in the field. Providing promising directions for investment and for new research in process intensification, in addition to a unique review of the fundamentals of the topic, this book is the perfect guide for senior undergraduate students, graduate students, developers, and research staff in chemical engineering and biochemical engineering.
Book Synopsis Nanoengineered Biomaterials for Advanced Drug Delivery by : Masoud Mozafari
Download or read book Nanoengineered Biomaterials for Advanced Drug Delivery written by Masoud Mozafari and published by Elsevier. This book was released on 2020-06-17 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoengineered Biomaterials for Advanced Drug Delivery explores the latest advances in the applications of nanoengineered biomaterials in drug delivery systems. The book covers a wide range of biomaterials and nanotechnology techniques that have been used for the delivery of different biological molecules and drugs in the human body. It is an important resource for biomaterials scientists and engineers working in biomedicine and those wanting to learn more on how nanoengineered biomaterials are being used to enhance drug delivery for a variety of diseases. Nanoengineered biomaterials have enhanced properties that make them more effective than conventional biomaterials as both drug delivery agents, and in the creation of new drug delivery systems. As nanoengineering becomes more cost-effective, nanoengineered biomaterials have become more widely used within biomedicine. Offers an informed overview on how nanoengineering biomaterials enhance their properties for drug delivery applications Discusses the major applications of nanoengineered biomaterials for drug delivery Outlines the major challenges for successfully implementing nanoengineered biomaterials into existing drug delivery systems
Book Synopsis Surfaces and Interfaces of Biomimetic Superhydrophobic Materials by : Zhiguang Guo
Download or read book Surfaces and Interfaces of Biomimetic Superhydrophobic Materials written by Zhiguang Guo and published by John Wiley & Sons. This book was released on 2017-09-13 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and systematic treatment that focuses on surfaces and interfaces phenomena inhabited in biomimetic superhydrophobic materials, offering new fundamentals and novel insights. As such, this new book covers the natural surfaces, fundamentals, fabrication methods and exciting applications of superhydrophobic materials, with particular attention paid to the smart surfaces that can show switchable and reversible water wettability under external stimuli, such as pH, temperature, light, solvents, and electric fields. It also includes recent theoretical advances of superhydrophobic surfaces with regard to the wetting process, and some promising breakthroughs to promote this theory. As a result, materials scientists, physicists, physical chemists, chemical engineers, and biochemists will benefit greatly from a deeper understanding of this topic.
Download or read book Nanodroplets written by Zhiming M. Wang and published by Springer Science & Business Media. This book was released on 2014-01-08 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanodroplets, the basis of complex and advanced nanostructures such as quantum rings, quantum dots and quantum dot clusters for future electronic and optoelectronic materials and devices, have attracted the interdisciplinary interest of chemists, physicists and engineers. This book combines experimental and theoretical analyses of nanosized droplets which reveal many attractive properties. Coverage includes nanodroplet synthesis, structure, unique behaviors and their nanofabrication, including chapters on focused ion beam, atomic force microscopy, molecular beam epitaxy and the "vapor-liquid- solid" route. Particular emphasis is given to the behavior of metallic nanodroplets, water nanodroplets and nanodroplets in polymer and metamaterial nanocomposites. The contributions of leading scientists and their research groups will provide readers with deeper insight into the chemical and physical mechanisms, properties, and potential applications of various nanodroplets.
Book Synopsis Multiphase Flow Handbook, Second Edition by : Efstathios Michaelides
Download or read book Multiphase Flow Handbook, Second Edition written by Efstathios Michaelides and published by CRC Press. This book was released on 2016-10-26 with total page 1559 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Multiphase Flow Handbook, Second Edition is a thoroughly updated and reorganized revision of the late Clayton Crowe’s work, and provides a detailed look at the basic concepts and the wide range of applications in this important area of thermal/fluids engineering. Revised by the new editors, Efstathios E. (Stathis) Michaelides and John D. Schwarzkopf, the new Second Edition begins with two chapters covering fundamental concepts and methods that pertain to all the types and applications of multiphase flow. The remaining chapters cover the applications and engineering systems that are relevant to all the types of multiphase flow and heat transfer. The twenty-one chapters and several sections of the book include the basic science as well as the contemporary engineering and technological applications of multiphase flow in a comprehensive way that is easy to follow and be understood. The editors created a common set of nomenclature that is used throughout the book, allowing readers to easily compare fundamental theory with currently developing concepts and applications. With contributed chapters from sixty-two leading experts around the world, the Multiphase Flow Handbook, Second Edition is an essential reference for all researchers, academics and engineers working with complex thermal and fluid systems.
Book Synopsis Dropwise Condensation on Inclined Textured Surfaces by : Sameer Khandekar
Download or read book Dropwise Condensation on Inclined Textured Surfaces written by Sameer Khandekar and published by Springer Science & Business Media. This book was released on 2013-09-06 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dropwise Condensation on Textured Surfaces presents a holistic framework for understanding dropwise condensation through mathematical modeling and meaningful experiments. The book presents a review of the subject required to build up models as well as to design experiments. Emphasis is placed on the effect of physical and chemical texturing and their effect on the bulk transport phenomena. Application of the model to metal vapor condensation is of special interest. The unique behavior of liquid metals, with their low Prandtl number and high surface tension, is also discussed. The model predicts instantaneous drop size distribution for a given level of substrate subcooling and derives local as well as spatio-temporally averaged heat transfer rates and wall shear stress.
Book Synopsis Non-wettable Surfaces by : Robin Ras
Download or read book Non-wettable Surfaces written by Robin Ras and published by Royal Society of Chemistry. This book was released on 2016-11-25 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nothing provided
Book Synopsis Physical Science Under Microgravity: Experiments on Board the SJ-10 Recoverable Satellite by : Wenrui Hu
Download or read book Physical Science Under Microgravity: Experiments on Board the SJ-10 Recoverable Satellite written by Wenrui Hu and published by Springer Nature. This book was released on 2019-10-16 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the physical science experiments in a space microgravity environment conducted on board the SJ-10 recoverable satellite, which was launched on April 6th, 2016 and recovered on April 18th, 2016. The experiments described were selected from ~100 proposals from various institutions in China and around the world, and have never previously been conducted in the respective fields. They involve fluid physics and materials science, and primarily investigate the kinetic properties of matter in a space microgravity environment. The book provides a comprehensive review of these experiments, as well as the mission’s execution, data collection, and scientific outcomes.
Book Synopsis Food Emulsions by : David Julian McClements
Download or read book Food Emulsions written by David Julian McClements and published by CRC Press. This book was released on 2015-08-21 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing the mission of the first two editions, Food Emulsions: Principles, Practices, and Techniques, Third Edition covers the fundamentals of emulsion science and demonstrates how this knowledge can be applied to control the appearance, stability, and texture of emulsion-based foods. Initially developed to fill the need for a single resource co
Book Synopsis Physico-Chemical Control of Cell Function by : Cesare Gargioli
Download or read book Physico-Chemical Control of Cell Function written by Cesare Gargioli and published by Frontiers Media SA. This book was released on 2019-10-17 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extracellular Matrix (ECM) has been considered for a long time merely a scaffold sustaining cell and tissue function. Despite this simplistic view shared by many, nowadays ECM and their mechanic-physical and chemical characteristic acquired a progressive larger role actively regulating cell life: survival, proliferation, gene expression and differentiation. The interplay between cells and the ECM is continuously controlled at the cell level in a dynamic way. While cells synthesize the raw components of the ECM, this in turn impacts on cell function by providing chemical, topographical and mechanical hints. Such stimuli have been proven to control several aspects of cell function, including survival, proliferation, differentiation and migration. The molecular pathways activated by cells in response to the physical cues arising from the ECM are being disclosed and thus the possibility to control cell function through materials design is becoming more realistic. Current in vitro protocols, relying in 2D cell culture system, entail reductionist approaches to the complexity of cell-ECM interaction and result in cells rapidly losing their distinctive functions in culture. Understanding and replicating the 3D microenvironmental cues affecting cell function appears as a mandatory requirement for the development of next-generation biomaterials, as well as for the establishment of more physiologically relevant and predictive in vitro models of diseases. Such an effort will require a multidisciplinary approach at the convergence of biophysics, biology, nanotechnology, and bioengineering.
Download or read book Ice Adhesion written by K. L. Mittal and published by John Wiley & Sons. This book was released on 2020-12-15 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book presents ways to mitigate the disastrous effects of snow/ice accumulation and discusses the mechanisms of new coatings deicing technologies. The strategies currently used to combat ice accumulation problems involve chemical, mechanical or electrical approaches. These are expensive and labor intensive, and the use of chemicals raises serious environmental concerns. The availability of truly icephobic surfaces or coatings will be a big boon in preventing the devastating effects of ice accumulation. Currently, there is tremendous interest in harnessing nanotechnology in rendering surfaces icephobic or in devising icephobic surface materials and coatings, and all signals indicate that such interest will continue unabated in the future. As the key issue regarding icephobic materials or coatings is their durability, much effort is being spent in developing surface materials or coatings which can be effective over a long period. With the tremendous activity in this arena, there is strong hope that in the not too distant future, durable surface materials or coatings will come to fruition. This book contains 20 chapters by subject matter experts and is divided into three parts— Part 1: Fundamentals of Ice Formation and Characterization; Part 2: Ice Adhesion and Its Measurement; and Part 3: Methods to Mitigate Ice Adhesion. The topics covered include: factors influencing the formation, adhesion and friction of ice; ice nucleation on solid surfaces; physics of ice nucleation and growth on a surface; condensation frosting; defrosting properties of structured surfaces; relationship between surface free energy and ice adhesion to surfaces; metrology of ice adhesion; test methods for quantifying ice adhesion strength to surfaces; interlaboratory studies of ice adhesion strength; mechanisms of surface icing and deicing technologies; icephobicities of superhydrophobic surfaces; anti-icing using microstructured surfaces; icephobic surfaces: features and challenges; bio-inspired anti-icing surface materials; durability of anti-icing coatings; durability of icephobic coatings; bio-inspired icephobic coatings; protection from ice accretion on aircraft; and numerical modeling and its application to inflight icing.
Book Synopsis Micro/Nano-Chip Electrokinetics, Volume III by : Xiangchun Xuan
Download or read book Micro/Nano-Chip Electrokinetics, Volume III written by Xiangchun Xuan and published by MDPI. This book was released on 2021-02-24 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro/nanofluidics-based lab-on-a-chip devices have found extensive applications in the analysis of chemical and biological samples over the past two decades. Electrokinetics is the method of choice in these micro/nano-chips for transporting, manipulating, and sensing various analyte species (e.g., ions, molecules, fluids, and particles). This book aims to highlight the recent developments in the field of micro/nano-chip electrokinetics, ranging from the fundamentals of electrokinetics to the applications of electrokinetics to both chemo- and bio-sample handling.
Book Synopsis Practical Nanotechnology for Petroleum Engineers by : Chun Huh
Download or read book Practical Nanotechnology for Petroleum Engineers written by Chun Huh and published by CRC Press. This book was released on 2019-03-04 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a concise but well-organized introduction to nanotechnology (NT) which the upstream oil industry is now vigorously adapting to develop its own unique applications for improved oilfield operations and, oil and gas production. Its reader will learn nanotechnology fundamentals, be introduced to important NT products and applications from other industries and learn about the current state of development of various NT applications in the upstream oil industry, which include innovative use of nanoparticles for enhanced oil recovery; drilling and completions; reservoir sensing; and production operations and flow assurance. Key Features Exclusive title on potential of nanoparticle-based agents and interventions for improving myriad of oilfield operations Unique guide for nanotechnology applications developers and users for oil and gas production Introduces nanotechnology for oil and gas managers and engineers Includes research data discussions relevant to field Offers a practical applications-oriented approach
