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Book Dynamics of Deformation of Liquid Drops

Download or read book Dynamics of Deformation of Liquid Drops written by H. H. Chiu and published by . This book was released on 1969 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: A time dependent analysis is made of the deformation of an initially spherical drop moving in an unbound fluid at low Reynolds number. It is found that the excitation of a particular mode of deformation, including simple deformation, oscillation, and unstable deformation, depends on the Reynolds number, Weber number, the ratios of the two fluid densities and viscosities. The result of an analysis in the limit of vanishing voscosities shows that the droplet vibrates. The characteristic frequency obtained in the present analysis agrees with that previously obtained by H. Lamb. For large viscosities a limiting analysis indicates that a droplet deforms asymptotically to the equilibrium shape predicted by T.D. Taylor and A. Acrivos. The characteristic time of the deformation for ethyl alcohol droplets of 20 to 80 micrometers in diameter vary approximately from 0.001 sec to 0.005 sec. The effects of increasing temperature and pressure, free stream velocity and the droplet size are examined numerically for the deformation of ethyl alcohol drops. The unstable modes of deformation are likely to be excited at Reynolds number and Weber number both greater than unity. (Author).

Book Dynamics of Bubbles Drops and Rigid Particles

Download or read book Dynamics of Bubbles Drops and Rigid Particles written by Z. Zapryanov and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. Objective and Scope Bubbles, drops and rigid particles occur everywhere in life, from valuable industrial operations like gas-liquid contracting, fluidized beds and extraction to such vital natural processes as fermentation, evaporation, and sedimentation. As we become increasingly aware of their fundamental role in industrial and biological systems, we are driven to know more about these fascinating particles. It is no surprise, therefore, that their practical and theoretical implications have aroused great interest among the scientific community and have inspired a growing number of studies and publications. Over the past ten years advances in the field of small Reynolds numbers flows and their technological and biological applications have given rise to several definitive monographs and textbooks in the area. In addition, the past three decades have witnessed enormous progress in describing quantitatively the behaviour of these particles. However, to the best of our knowledge, there are still no available books that reflect such achievements in the areas of bubble and drop deformation, hydrodynamic interactions of deformable fluid particles at low and moderate Reynolds numbers and hydrodynamic interactions of particles in oscillatory flows. Indeed, only one more book is dedicated entirely to the behaviour of bubbles, drops and rigid particles ["Bubbles, Drops and Particles" by Clift et al. (1978)] and the authors state its limitations clearly in the preface: "We treat only phenomena in which particle-particle interactions are of negligible importance. Hence, direct application of the book is limited to single-particle systems of dilute suspensions.

Book Drop Bubble and Particle Dynamics in Complex Fluids

Download or read book Drop Bubble and Particle Dynamics in Complex Fluids written by Pengtao Yue and published by MDPI. This book was released on 2020-03-19 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book The Approach and Coalescence of Liquid Drops in Air

Download or read book The Approach and Coalescence of Liquid Drops in Air written by and published by . This book was released on 2013 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The coalescence of liquid drops has conventionally been thought to have just two regimes when the drops are brought together slowly in vacuum or air: a viscous regime corresponding to the Stokes-flow limit and a later, inertial, regime where viscous effects are unimportant. Recently, Paulsen et al. showed that for low-viscosity drops there is an unexpectedly late crossover to the inertial regime. Further work confirmed that this picture with only two regimes must be supplanted by a description having a third regime with distinct dynamics. I use an ultrafast electrical method and high-speed imaging to provide a detailed description of coalescence near the moment of contact for drops that approach at sufficiently slow speed, where no drop deformation occurs before contact. These measurements support the new picture of coalescence. At higher approach speeds, signatures both before and after contact indicate that the intervening gas layer has deformed the drops before they touch.

Book Dynamics of Droplets

Download or read book Dynamics of Droplets written by Arnold Frohn and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book Deformation and Migration of Liquid Drops

Download or read book Deformation and Migration of Liquid Drops written by C. E. Chaffey and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fluid Dynamics of Particles Drops and Bubbles

Download or read book Fluid Dynamics of Particles Drops and Bubbles written by Eric Loth and published by Cambridge University Press. This book was released on 2023-06-30 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern presentation of multiphase flow, from basic principles to state-of-the-art research. Explains dispersed fluid dynamics for bubbles, drops, or solid particles, incorporating detailed theory, experiments, simulations, and models while considering applications and recent cutting-edge advances. The book demonstrates the importance of multiphase flow in engineering and natural systems, considering particle size distributions, shapes and trajectories as well as deformation of fluid particles and multiphase flow numerical methods. The scope of the book also includes coupling physics between particles and turbulence through dispersion and modulation, and specific phenomena such as gravitational settling and collisions for solid particles, drops and bubbles. Featuring over eighty homework problems for each of the primary chapters, including theory-based and engineering application questions. The comprehensive coverage will give the reader a solid grounding for multiphase flow research and design, applicable to current and future engineering. This is an ideal resource for graduate students, researchers and professionals.

Book Study of Deformation of Non oscillating Droplets in Liquid Media

Download or read book Study of Deformation of Non oscillating Droplets in Liquid Media written by Arun Kumar Agrawal and published by . This book was released on 1965 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The object of this investigation was to find a method for predicting the deformation of non-oscillating liquid droplets which are moving in liquid media, from a knowledge of droplet size and the physical properties of the continuous and dispersed phase systems. The deformation of thirteen liquid-liquid systems was experimentally studied in this investigation"--Abstract, leaf i.

Book Dynamic Simulation of the Flow of a Suspension of Liquid Drops

Download or read book Dynamic Simulation of the Flow of a Suspension of Liquid Drops written by Richard D. Charles and published by . This book was released on 1997 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Book Viscous Flow of a Suspension of Deformable Liquid Drops in a Cylindrical Tube

Download or read book Viscous Flow of a Suspension of Deformable Liquid Drops in a Cylindrical Tube written by William Albert Hyman and published by . This book was released on 1970 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Viscous flow in a circular cylindrical tube containing an infinite line of deformable liquid drops equally spaced along the tube axis is considered. The fluid within the drops as well as the suspending fluid is taken to be Newtonian and incompressible. A surface tension is assumed to act at the interface. Two types of solutions are developed depending on the magnitude of the distortion of the drop shape from spherical. A perturbation solution is employed for nearly spherical drops. In this case the flow of the suspending fluid and liquid drops under an imposed pressure gradient is a linear combination of the solutions obtained for (1) the axial translation of the drops, and (2) the flow of the suspending fluid past the drops. For large deformations the problem is no longer linear in these two flows. An approximate numerical technique is employed for this case which yields the drop shape as well as the other parameters of the flow. The results show that both drag and pressure loss per drop increases with both increasing drop spacing and radius. The internal motion of the drops reduces the drag and pressure gradients as compared with rigid spheres of equal volume. Further, due to the deformation, the overall resistance decreases with increasing flow rate. This constitutes a mechanism of non-Newtonian behavior of the suspension as a whole. (Author).

Book Drop Surface Interactions

Download or read book Drop Surface Interactions written by Martin Rein and published by Springer. This book was released on 2014-05-04 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview of fluid mechanical, thermal and physico-chemical aspects of drop-surface interactions. Basic physical mechanisms pertaining to free-surface flow phenomena characteristic of drop impact on solid and liquid surfaces are explained emphasizing the importance of scaling. Moreover, physico-chemical fundamentals relating to a forced spreading of complex solutions, analytical tools for calculating compressibility effects, and heat transfer and phase change phenomena occurring during solidification and evaporation processes, respectively, are introduced in detail. Finally, numerical approaches particularly suited for modeling drop-surface interactions are consisely surveyed with a particular emphasis on boundary integral methods and Navier-Stokes algorithms (volume of fluid, level set and front tracking algorithms). The book is closed by contributions to a workshop on Drop-Surface Interactions held at the International Centre of Mechanical Sciences.

Book Dynamic Simulation of Drops by the Particle Finite Element Method

Download or read book Dynamic Simulation of Drops by the Particle Finite Element Method written by Elaf Naeem Mahrous and published by . This book was released on 2021 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid drop dynamics on solid surfaces play an important role both in nature and engineered applications. The prediction of drop spreading and/or sliding motions has far-reaching implications in many fields of application, including microfluidics, phase change applications, or coating technology. Modeling liquid drop spreading, sliding, deformation, and detachment is an active area of research, involving contact line motion, wetting, and interfacial effects.