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Author : Wei Shyy
Publisher : Cambridge University Press
Page : 482 pages
File Size : 18,46 MB
Release : 1999-09-28
Category : Science
ISBN : 9780521642668
In this book experts discuss research and applications in interfacial fluid dynamics.
Author : Dieter Bothe
Publisher : Birkhäuser
Page : 677 pages
File Size : 34,13 MB
Release : 2017-07-13
Category : Mathematics
ISBN : 3319566024
There are several physico-chemical processes that determine the behavior of multiphase fluid systems – e.g., the fluid dynamics in the different phases and the dynamics of the interface(s), mass transport between the fluids, adsorption effects at the interface, and transport of surfactants on the interface – and result in heterogeneous interface properties. In general, these processes are strongly coupled and local properties of the interface play a crucial role. A thorough understanding of the behavior of such complex flow problems must be based on physically sound mathematical models, which especially account for the local processes at the interface. This book presents recent findings on the rigorous derivation and mathematical analysis of such models and on the development of numerical methods for direct numerical simulations. Validation results are based on specifically designed experiments using high-resolution experimental techniques. A special feature of this book is its focus on an interdisciplinary research approach combining Applied Analysis, Numerical Mathematics, Interface Physics and Chemistry, as well as relevant research areas in the Engineering Sciences. The contributions originated from the joint interdisciplinary research projects in the DFG Priority Programme SPP 1506 “Transport Processes at Fluidic Interfaces.”
Author : David Canright
Publisher : World Scientific
Page : 331 pages
File Size : 29,10 MB
Release : 2002-05-30
Category : Technology & Engineering
ISBN : 1783261242
This book highlights some recent advances in interfacial research in the fields of fluid mechanics and materials science at the beginning of the twenty-first century. It is an extension of the presentations made during the conference “Interfaces for the 21st Century,” held on August 16-18, 1999, in Monterey, California. It includes papers by sixteen renowned experts in the field of interfacial mechanics, abstracts contributed by research scientists, and a summary of a panel discussion on future research directions. The book covers experimental and theoretical approaches, with the unifying philosophy being the investigation of new techniques for modeling the dynamics of interfaces. A number of new and exciting solution methods and experimental studies, as well as the physical problems that initiated them, are presented.
Author : Shigeo Fujikawa
Publisher : Springer Science & Business Media
Page : 235 pages
File Size : 39,27 MB
Release : 2011-04-16
Category : Technology & Engineering
ISBN : 3642180388
Physically correct boundary conditions on vapor-liquid interfaces are essential in order to make an analysis of flows of a liquid including bubbles or of a gas including droplets. Suitable boundary conditions do not exist at the present time. This book is concerned with the kinetic boundary condition for both the plane and curved vapor-liquid interfaces, and the fluid dynamics boundary condition for Navier-Stokes(fluid dynamics) equations. The kinetic boundary condition is formulated on the basis of molecular dynamics simulations and the fluid dynamics boundary condition is derived by a perturbation analysis of Gaussian-BGK Boltzmann equation applicable to polyatomic gases. The fluid dynamics boundary condition is applied to actual flow problems of bubbles in a liquid and droplets in a gas.
Author : Carlo Gualtieri
Publisher : Taylor & Francis
Page : 349 pages
File Size : 28,9 MB
Release : 2008-02-19
Category : Science
ISBN : 1134064233
An environmental interface is defined as a surface between two abiotic or biotic systems, in relative motion and exchanging mass, heat and momentum through biophysical and/or chemical processes. These processes fluctuate temporally and spatially. The book first treats exchange processes occurring at the interfaces between atmosphere and the surface of the sea, and atmosphere and land surface. These exchanges include the effect of vegetation, transport of dust and dispersion of passive substances within the atmosphere. Processes at the environmental interfaces of freshwater, such as gas-transfer at free-surfaces of rivers, advective diffusion of air bubbles in turbulent water flows and boundary-layers phenomena in vegetated open channels are also described. Finally, the book deals with the phenomena that affect transport of material to and from the surface of an organism, including molecular and turbulent diffusion. The relevant issues related to mass transfer to and from benthic plants and animals are further considered in detail. The book will be of interest to graduate students and researchers in environmental sciences, civil engineering and environmental engineering, (geo)physics and applied mathematics.
Author : Mohammad Taeibi Rahni
Publisher : CRC Press
Page : 0 pages
File Size : 26,55 MB
Release : 2015-11-02
Category : Science
ISBN : 9781498722087
Fluid interfaces are omnipresent in modern technologies, and their quantitative characterization is essential for their optimum use. Processes like emulsification, foaming or coating require the understanding of very dynamic properties. The enormous progress made recently by various types of simulations provides new opportunities for a much better foundation of highly dynamic experimental methods. This book is dedicated to present the state of the art of experimental methodologies and the numerous simulation techniques required for the quantification of many interfacial parameters.
Author : Jianghui Chao
Publisher :
Page : pages
File Size : 49,87 MB
Release : 2006
Category :
ISBN :
In order to suppress numerical instabilities associated with the presence of the interface, the following approaches were investigated: (i) a new surface tension formulation originated from the diffusion interface method was used to remove unphysical pressure wiggles across interfaces; (ii) a filter scheme was used in numerical gradient calculations to maintain monotonic property variations; (iii) a volume-correction procedure was devised. The performance of the improved LBE model was evaluated using the Rayleigh-Taylor instability problem, stationary bubble under force equilibrium, capillary waves, and rising bubbles. The computational results demonstrated that this LBE two-phase model is more robust than those reported in the literature, capable of treating larger density ratio up to order O(102), while confining the interface thickness within 5-6 grids.
Author : Roger Prudhomme
Publisher : John Wiley & Sons
Page : 258 pages
File Size : 28,95 MB
Release : 2022-04-05
Category : Science
ISBN : 1786308169
Interfaces are present in most fluid mechanics problems. They not only denote phase separations and boundary conditions, but also thin flames and discontinuity waves. Fluid Mechanics at Interfaces 1 focuses on the science of interfaces, in particular, using various scientific methods of analysis relating to space, speed and time. Our investigation takes us from the microscopic or small scale (starting with molecular and nanoscopic scales) to the macroscopic (including meso and interstellar scales), and also explores the laws of interfaces (classical mechanics, quantum mechanics and relativistic mechanics). Chapter 1 examines the questions raised by modeling interfaces in the presence of one or more fluid phases. Chapter 2 discusses the action of turbulence in liquid–vapor flows that contain both small, dispersed bubbles as well as large bubbles, with heat exchanges at the interfaces. In addition, a new model is presented, using large eddy simulation (LES). Chapter 3 studies an original method for calculating the drag force and thermal transfers in flows around networks of spherical particles, while Chapter 4 focuses on the relationships between interfaces and critical fluids. Chapter 5 examines shearing, which causes anomalies in the Brownian motion of particles in strongly fluctuating near-critical mixtures, and Chapter 6 introduces basic concepts related to combustion interfaces, raising the question of the combustion of solids, before ending with a brief presentation of the Rankine–Hugoniot theory and a historical overview of the research carried out in the field of combustion.
Author : Boo Cheong Khoo
Publisher : American Mathematical Soc.
Page : 202 pages
File Size : 40,99 MB
Release : 2008
Category : Mathematics
ISBN : 0821842676
This volume is a collection of research papers presented at the program on Moving Interface Problems and Applications in Fluid Dynamics, which was held between January 8 and March 31, 2007 at the Institute for Mathematical Sciences (IMS) of the National University of Singapore. The topics discussed include modeling and simulations of biological flow coupled to deformable tissue/elastic structure, shock wave and bubble dynamics and various applications including biological treatments with experimental verification, multi-medium flow or multi-phase flow and various applications including cavitation/supercavitation, detonation problems, Newtonian and non-Newtonian fluid, and many other areas. Readers can benefit from some recent research results in these areas.
Author : S.S. Dukhin
Publisher : Elsevier
Page : 601 pages
File Size : 49,71 MB
Release : 1995-04-11
Category : Technology & Engineering
ISBN : 0080530613
As the first of its kind, this book provides a valuable introduction for scientists and engineers interested in liquid/fluid interfaces and disperse systems to the rapidly developing area of adsorption dynamics. It is the first extensive review available on the subject of dynamics of adsorption and gives a general summary of the current state of adsorption kinetics theory and experiments. Current progress in recently designed set-ups and improved and generalised known methods for studying interfacial relaxations is reviewed. In addition, the role of the electric charge of surfactants in the adsorption process is discussed in terms of a non-equilibrium distribution of adsorbing ions in the diffuse layer. Present theories of the effect of dynamic adsorption layers on mobile surfaces, such as moving drops and bubbles, based on both diffusion and kinetic controlled adsorption models are described and efficient approximate analytical methods to solve the mathematical problem of coupling surfactant transport and hydrodynamics are introduced. The role of a dynamic adsorption layer in bubble rising, film drainage and film stabilisation and in complex processes such as flotation and microflotation is discussed. Containing more than 1100 references, the book is essential reading for industrial scientists and graduate and post-graduate students in physical, surface and colloid chemistry, physico-chemical hydrodynamics, water purification and mineral processing.