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Author: f. g. hammitt
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Book Description
Author: f. g. hammitt
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Book Description
Author: Eduardo A. Castillo Orozco
Publisher:
ISBN:
Category :
Languages : en
Pages : 51
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Book Description
This could result in jet breakup and formation of secondary drops. In other words, both the formation of the jet and its breakup require a balance between viscous, capillary and surface tension forces. Based on Ohnesorge number (Oh) and impact Weber number (We), a regime map for no breakup, Rayleigh jet breakup, and crown splash is suggested for 0.0033 [less than or equal to] Oh [less than or equal to] 0.136. For Weber numbers beyond the critical value and Oh [less than or equal to] 0.091 the jet breakup occurs (Rayleigh jet breakup regime). While for Oh [greater than] 0.091, the jet breakup is suppressed regardless of the Weber number. In addition, high impact velocity initiates the crown formation and if further intensified it can disintegrate it into numerous secondary drops (crown splash) and it is observed to occur at all Ohnesorge numbers and high enough Weber numbers, however, at high Oh, a large portion of kinetic energy is dissipated, thus Rayleigh jet breakup is suppressed regardless of the magnitude of the impact velocity. Moreover, a correlation is proposed for normalized time with respect to the normalized maximum height of jet.
Author: K. L. Mittal
Publisher: John Wiley & Sons
ISBN: 1118831543
Category : Technology & Engineering
Languages : en
Pages : 482
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Book Description
The book provides a comprehensive and easily accessible reference source covering all important aspects of particle adhesion and removal. The core objective is to cover both fundamental and applied aspects of particle adhesion and removal with emphasis on recent developments. Among the topics to be covered include: 1. Fundamentals of surface forces in particle adhesion and removal. 2. Mechanisms of particle adhesion and removal. 3. Experimental methods (e.g. AFM, SFA,SFM,IFM, etc.) to understand particle-particle and particle-substrate interactions. 4. Mechanics of adhesion of micro- and nanoscale particles. 5. Various factors affecting particle adhesion to a variety of substrates. 6. Surface modification techniques to modulate particle adhesion. 7. Various cleaning methods (both wet & dry) for particle removal. 8. Relevance of particle adhesion in a host of technologies ranging from simple to ultra-sophisticated.
Author: Huimin Liu
Publisher: William Andrew
ISBN: 0815518943
Category : Technology & Engineering
Languages : en
Pages : 541
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Book Description
This is the first book to encompass the fundamental phenomenon, principles, and processes of discrete droplets of both normal liquids and melts. It provides the reader with the science and engineering of discrete droplets, and provides researchers, scientists and engineers with the latest developments in the field. The book begins with a systematic review of various processes and techniques, along with their applications and associations with materials systems. This is followed by a description of the phenomena and principles in droplet processes. Correlations, calculations, and numerical modeling of the droplet processes provide insight into the effects of process parameters on droplet properties for optimization of atomizer design. Droplets are found in the areas of metallurgy, materials, automotive, aerospace, medicine, food processing, agriculture, and power generation, and encountered in a huge range of engineering applications.
Author: Kyuichi Yasui
Publisher: Springer
ISBN: 3319682377
Category : Science
Languages : en
Pages : 131
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Book Description
This brief explains in detail fundamental concepts in acoustic cavitation and bubble dynamics, and describes derivations of the fundamental equations of bubble dynamics in order to support those readers just beginning research in this field. Further, it provides an in-depth understanding of the physical basis of the phenomena. With regard to sonochemistry, the brief presents the results of numerical simulations of chemical reactions inside a bubble under ultrasound, especially for a single-bubble system and including unsolved problems. Written so as to be accessible both with and without prior knowledge of fundamental fluid dynamics, the brief offers a valuable resource for students and researchers alike, especially those who are unfamiliar with this field. A grasp of fundamental undergraduate mathematics such as partial derivative and fundamental integration is advantageous; however, even without any background in mathematics, readers can skip the equations and still understand the fundamental physics of the phenomena using the book’s wealth of illustrations and figures. As such, it is also suitable as an introduction to the field.
Author: Arnold Frohn
Publisher: Springer Science & Business Media
ISBN: 3662040409
Category : Technology & Engineering
Languages : en
Pages : 298
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Book Description
The book deals with the dynamical behaviour of single droplets and regular droplet systems. It has been written mainly for experimental researchers. After a short description of the theoretical background, the different experimental facilities and methods necessary for the investigation of single droplets are described in detail. A summary of important applications is included.
Author: G. I. Barenblatt
Publisher: Cambridge University Press
ISBN: 9780521435222
Category : Mathematics
Languages : en
Pages : 412
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Book Description
Scaling laws reveal the fundamental property of phenomena, namely self-similarity - repeating in time and/or space - which substantially simplifies the mathematical modelling of the phenomena themselves. This book begins from a non-traditional exposition of dimensional analysis, physical similarity theory, and general theory of scaling phenomena, using classical examples to demonstrate that the onset of scaling is not until the influence of initial and/or boundary conditions has disappeared but when the system is still far from equilibrium. Numerous examples from a diverse range of fields, including theoretical biology, fracture mechanics, atmospheric and oceanic phenomena, and flame propagation, are presented for which the ideas of scaling, intermediate asymptotics, self-similarity, and renormalisation were of decisive value in modelling.
Author: JE. Field
Publisher:
ISBN:
Category : Electron microscopy
Languages : en
Pages : 22
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Book Description
Two methods are described for producing high-velocity liquid impacts. The first involves projecting a jet of liquid at a stationary target while in the second specimens are fired at suspended drops. An objective of the study was to place the jet method on a quantitative basis. Detailed studies of jets, using high-speed photography, allowed the conditions for producing stable and reproducible jets to be obtained for a range of jet velocities (up to ~1000ms-1) and jet diameters (0.4 to 3.2 mm). The relation between jet impact and drop impact damage was achieved after experiments in which high-speed photography, pressure measuring techniques, and damage studies played important roles. The quantitative establishment of the jet method has practical implications since it has advantages in its ease of operation, its ability to simulate large drops, and in having the target stationary. Finally, a hydrostatic test apparatus for measuring the residual strength of brittle specimens following impact and examples of measurements on glasses and silicon nitride are described. Factors affecting the shape of residual strength curves are discussed.
Author: Grazia Lamanna
Publisher: Springer Nature
ISBN: 3030333388
Category : Technology & Engineering
Languages : en
Pages : 311
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Book Description
This book provides a selection of contributions to the DIPSI workshop 2019 (Droplet Impact Phenomena & Spray Investigations) as well as recent progress of the Int. Research Training Group “DROPIT”.The DIPSI workshop, which is now at its thirteenth edition, represents an important opportunity to share recent knowledge on droplets and sprays in a variety of research fields and industrial applications. The research training group “DROPIT” is focused on droplet interaction technologies where microscopic effects influence strongly macroscopic behavior. This requires the inclusion of interface kinetics and/or a detailed analysis of surface microstructures. Normally, complicated technical processes cover the underlying basic mechanisms, and therefore, progress in the overall process modelling can hardly be gained. Therefore, DROPIT focuses on the underlying basic processes. This is done by investigating different spatial and/or temporal scales of the problems and by linking them through a multi-scale approach. In addition, multi-physics are required to understand e.g. problems for droplet-wall interactions, where porous structures are involved.
Author: Alexander L. Yarin
Publisher: Cambridge University Press
ISBN: 1107147905
Category : Science
Languages : en
Pages : 629
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Book Description
A unique and in-depth discussion uncovering the unifying features of collision phenomena in liquids and solids, along with applications.
