Download or read book Hydrodynamic Interactions Between Particles in Low Reynolds Number Flow written by Sangtae Kim and published by . This book was released on 1984 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Hydrodynamic Interactions in Intermediate Reynolds Number Flows written by Açmae El Yacoubi and published by . This book was released on 2013 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collective behavior and self-organization are ubiquitous mechanisms in nature. From animate creatures, such as swarming insects, flocking birds and schooling fish, to inanimate natural processes such as sedimentation and cloud formation, these phenomena arouse the curiosity of physicists and engineers alike. Early studies using analytical models and experiments in the low Reynolds number helped shed the light on the intricacies of particle interactions, as in clouds or arrays of spheres. In the intermediate Reynolds number regime however, the unsteadiness introduced by the fluid inertia, coupled to the object dynamics, add to the complexity of the problem. Numerical methods become then the tool par excellence to solve for these dynamics. The goal of this thesis is to lay out the foundations for a better understanding of particle interactions in fluids. Namely, we investigate the two-dimensional dynamics of interacting particles in a viscous fluid, in the intermediate Reynolds number range. We develop a direct numerical scheme based on the Immersed Interface Method to simulate the coupling of the dynamics of freely moving objects with the surrounding fluid. The method is used to study the dynamics of arrays of cylinders settling under gravity, and how these dynamics depend on the number of particles and their initial separation. We then provide a simple force law model which accounts for the initial repulsive force experienced by any two adjacent cylinders, at close range. When the particle density is high, collisions are almost inevitable. To treat close range interactions and resolve the interstitial flow in the narrowing gap between particles or between a particle and a wall, we further extend the immersed interface method to take into account the lubrication effects. We solve Reynolds equations and use the analytical solution in the lubrication region. Doing so enables us to avoid ad hoc methods where an artificial repulsive force is added or two-dimensional collision equations are used with a modified coefficient of restitution.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Reynolds Number Hydrodynamics written by John Happel and published by . This book was released on 1973 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrodynamic interaction of an arbitrary particle with a planar wall at low Reynolds number written by Richard S.-C. Hsu and published by . This book was released on 1988 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particles in Wall Bounded Turbulent Flows Deposition Re Suspension and Agglomeration written by Jean-Pierre Minier and published by Springer. This book was released on 2016-07-26 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents an up-to-date review of turbulent two-phase flows with the dispersed phase, with an emphasis on the dynamics in the near-wall region. New insights to the flow physics are provided by direct numerical simuation and by fine experimental techniques. Also included are models of particle dynamics in wall-bounded turbulent flows, and a description of particle surface interactions including muti-layer deposition and re-suspension.
Download or read book Low Reynolds Number Hydrodynamics written by John Happel and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MRC Technical Summary Report written by University of Wisconsin--Madison. Mathematics Research Center and published by . This book was released on 1984 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An exact Solution for the Hydrodynamic Interaction of a Three dimensional Finite Cluster of Arbitrarily Sized Spherical Particles at Low Reynolds Number written by Qaizar Hassonjee and published by . This book was released on 1987 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrodynamic Interactions in Colloidal and Biological Systems written by Michael Reichert and published by . This book was released on 2006 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiscale Modeling of Particle Interactions written by Michael King and published by John Wiley & Sons. This book was released on 2010-03-30 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover how the latest computational tools are building our understanding of particle interactions and leading to new applications With this book as their guide, readers will gain a new appreciation of the critical role that particle interactions play in advancing research and developing new applications in the biological sciences, chemical engineering, toxicology, medicine, and manufacturing technology The book explores particles ranging in size from cations to whole cells to tissues and processed materials. A focus on recreating complex, real-world dynamical systems helps readers gain a deeper understanding of cell and tissue mechanics, theoretical aspects of multiscale modeling, and the latest applications in biology and nanotechnology. Following an introductory chapter, Multiscale Modeling of Particle Interactions is divided into two parts: Part I, Applications in Nanotechnology, covers: Multiscale modeling of nanoscale aggregation phenomena: applications in semiconductor materials processing Multiscale modeling of rare events in self-assembled systems Continuum description of atomic sheets Coulombic dragging and mechanical propelling of molecules in nanofluidic systems Molecular dynamics modeling of nanodroplets and nanoparticles Modeling the interactions between compliant microcapsules and patterned surfaces Part II, Applications in Biology, covers: Coarse-grained and multiscale simulations of lipid bilayers Stochastic approach to biochemical kinetics In silico modeling of angiogenesis at multiple scales Large-scale simulation of blood flow in microvessels Molecular to multicellular deformation during adhesion of immune cells under flow Each article was contributed by one or more leading experts and pioneers in the field. All readers, from chemists and biologists to engineers and students, will gain new insights into how the latest tools in computational science can improve our understanding of particle interactions and support the development of novel applications across the broad spectrum of disciplines in biology and nanotechnology.
Download or read book Particles Bubbles Drops written by Efstathios Michaelides and published by World Scientific. This book was released on 2006 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of multiphase flows has grown by leaps and bounds in the last thirty years and is now regarded as a major discipline. Engineering applications, products and processes with particles, bubbles and drops have consistently grown in number and importance. An increasing number of conferences, scientific fora and archived journals are dedicated to the dissemination of information on flow, heat and mass transfer of fluids with particles, bubbles and drops. Numerical computations and "thought experiments" have supplemented most physical experiments and a great deal of the product design and testing processes. The literature on computational fluid dynamics with particles, bubbles and drops has grown at an exponential rate, giving rise to new results, theories and better understanding of the transport processes with particles, bubbles and drops. This book captures and summarizes all these advances in a unified, succinct and pedagogical way. Contents: Fundamental Equations and Characteristics of Particles, Bubbles and Drops; Low Reynolds Number Flows; High Reynolds Number Flows; Non-Spherical Particles, Bubbles and Drops; Effects of Rotation, Shear and Boundaries; Effects of Turbulence; Electro-Kinetic, Thermo-Kinetic and Porosity Effects; Effects of Higher Concentration and Collisions; Molecular and Statistical Modeling; Numerical Methods-CFD. Key Features Summarizes the recent important results in the theory of transport processes of fluids with particles, bubbles and drops Presents the results in a unified and succinct way Contains more than 600 references where an interested reader may find details of the results Makes connections from all theories and results to physical and engineering applications Readership: Researchers, practicing engineers and physicists that deal with any aspects of Multiphase Flows. It will also be of interest to academics and researchers in the general fields of mechanical and chemical engineering.
Download or read book Low Reynolds Number Flows Past Drops Porous Particles and Colloids written by Masami Kojima and published by . This book was released on 1983 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MRC Technical Summary Report written by United States. Army. Mathematics Research Center and published by . This book was released on 1984 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Massive Distributed Computational Algorithm for Simulating Many body Hydrodynamic Interactions written by Yu Su and published by . This book was released on 2018 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex fluids comprise two phases of materials: a solvent phase and a non-continuum phase such as microscopic particles or polymers. Suspensions of colloids -- microscopic particles small enough to undergo Brownian motion -- are an important example and model system for understanding general complex fluids. The particles are distributed in the suspending solvent, forming a "microstructure". The formulation of detailed models for the dynamics of condensed soft matter including colloidal suspensions and other complex fluids requires accurate description of the physical forces between microstructural constituents. In dilute suspensions, pair-level interactions are sufficient to capture hydrodynamic, interparticle, and thermodynamic forces. In dense suspensions, many-body interactions must be considered. Prior analytical approaches to capturing such interactions such as mean-field approaches replace detailed interactions with averaged approximations. However, long-range coupling and effects of concentration on local structure, which may play an important role in e.g. phase transitions, are smeared out in such approaches. An alternative to such approximations is the detailed modeling of hydrodynamic interactions utilizing precise couplings between moments of the hydrodynamic traction on a suspended particle and the motion of that or other suspended particles. For two isolated spheres, a set of these functions was calculated by Jeffrey and Onishi, Kim and Karrila, and Jeffrey. Along with pioneering work by Batchelor and Green, these are the touchstone for low-Reynolds-number hydrodynamic interactions and have been applied directly in the solution of many important problems related to the dynamics of dilute colloidal dispersions. The Reynolds number, Re, is the dimensionless strength of flow inertia relative to viscous stress, $Re = \rho U L / \eta$, where $\rho$ is the fluid density, $\eta$ is the fluid viscosity, $U$ is the characteristic speed of the flow, and $L$ is the characteristic length scale such as channel width, particle size, or a surface dimension. The overall goal of this dissertation is development of new theoretical and computational models for many-body interactions in concentrated colloidal suspensions. In the first part of the dissertation, we extend the theoretical framework of the pair-level mobility functions to concentrated systems, utilizing a new stochastic sampling technique we developed in order to rapidly calculate an analogous set of mobility functions describing the hydrodynamic interactions between two hard spheres immersed in a suspension of arbitrary concentration. This was carried out utilizing Accelerated Stokesian Dynamics simulations. These mobility functions provide precise, radially dependent couplings of hydrodynamic traction moments to particle velocity derivatives, for arbitrary colloid volume fraction $\phi=4\pi\eta a^3/n$, where $\eta$ is the suspending solvent viscosity, $a$ is the hydrodynamic particle radius, and $n=N/V$ is the number density of colloids in the volume $V$ of solvent. The most significant outcome of this work was to show that hydrodynamic entrainment of one particle by the disturbance flow created by a forced particle decays algebraically just as slowly as a dilute suspension...
Download or read book Collective Dynamics of Particles written by Cristian Marchioli and published by . This book was released on 2017 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the Mathematics Research Center July 1 1975 Thru December 31 1985 written by University of Wisconsin--Madison. Mathematics Research Center and published by . This book was released on 1985 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
