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270 produkter

Del 130 - Fluid Mechanics and Its Applications
Fundamentals of Turbomachines
AvErik Dick
Häftad, Engelska, 2023
923 kr
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This textbook explores the working principles of all kinds of turbomachines. The same theoretical framework is used to analyze the different machine types. The order in which the different kinds are treated is chosen by the possibility of gradually building up theoretical concepts. For each of the turbomachine kinds, a balance is sought between fundamental understanding and knowledge of practical aspects. Readers are invited through challenging exercises to consider how the theory applies to particular cases. This textbook appeals to senior undergraduate and graduate students in mechanical engineering and to professional engineers seeking to understand the operation of turbomachines. Readers will gain a fundamental understanding of turbomachines and will be able to make a reasoned choice of a turbomachine for a particular application.
Turbulence and Coherent Structures
AvTurbulence 89 Organized Structures and T,O. Métaism. fl.
Inbunden, Engelska, 1990
2 162 kr
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In the last 25 years, one of the most striking advances in Fluid Mecha nics was certainly the discovery of coherent structures in turbulence: lab oratory experiments and numerical simulations have shown that most turbulent flows exhibit both spatially-organized large-scale structures and disorganized motions, generally at smaller scales. The develop ment of new measurement and visualization techniques have allowed a more precise characterization and investigation of these structures in the laboratory. Thanks to the unprecedented increase of computer power and to the development of efficient interactive three-dimensional colour graphics, computational fluid dynamicists can explore the still myste rious world of turbulence. However, many problems remain unsolved concerning the origin of these structures, their dynamics, and their in teraction with the disorganized motions. In this book will be found the latest results of experimentalists, theoreticians and numerical modellers interested in these topics. These coherent structures may appear on airplane wings or slender bodies, mixing layers, jets, wakes or boundary-layers. In free-shear flows and in boundary layers, the results presented here highlight the intense three-dimensional character of the vortices. The two-dimensional large scale eddies are very sensitive to three-dimensional perturbations, whose amplification leads to the formation of three-dimensional coherent vorti cal structures, such as streamwise, hairpin or horseshoe vortex filaments. This book focuses on modern aspects of turbulence study. Relations between turbulence theory and optimal control theory in mathematics are discussed. This may have important applications with regard to, e. g. , numerical weather forecasting.
Del 3 - Fluid Mechanics and Its Applications
Magnetohydrodynamics
AvR.J. Moreau
Inbunden, Engelska, 1990
1 623 kr
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Turbulence Control by Passive Means
Proceedings of the 4th European Drag Reduction Meeting
AvEuropean Drag Reduction Meeting 4th 1989,E. Coustols
Inbunden, Engelska, 1990
1 623 kr
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In the last decades, a lot of effort has been directed towards manipulation of turbulent boundary layers by passive devices such as external manipulators (thin flat plates or aerofoil section devices embedded in the outer layer) and/or internal manipulators (small streamwise grooves acting directly on the inner region) for the purpose of reducing viscous drag. The former are commonly referred to as LEI3U s or BLADEs and the laHer riblets or grooves. Though the details of the mechanisms are not firmly understood, world-wide experimenta.! data are available and consistent enough in order to assert the potential of such devices for turbulent drag reduction. It should be noted that following on from recent and successful flight tests, the concept of using grooved surfaces is rather close to finding industrial applications. During the last few years, in Europe, there has been considerable interest in lookillg at the behaviour of such passi,'e turbulence manipulators. A lot of intense research, concerning both experimental and theoretical studies. has been carried out in some European research centres. For the last fi\'e years. informal gatherings. called ,.\\'orking Pi\l'ty i\Ieetings" , have been set up, once a year; the aim of these meetings is not only to bring together European researchers acti,'e in the field of turbulent drag reduction by passi"e means and to hear about recent de\'c!opments but also to o u t1 ine sui tit ble directions for future research or collaborative programmes.
Dynamic Structure of Detonation in Gaseous and Dispersed Media
AvA.A. Borissov
Inbunden, Engelska, 1991
2 162 kr
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Of late the demands of industry in creating new composite and functional materials with present properties stimulated an increased interest to the investigation of processes which occur in the detonation technologies of complex chemical composition with an additive of disperse particles. The collection includes a series of papers presented at the 3d International Conference "Lavrentyev Readings on Mathematics, Mechanics, and Physics" (Novosibirsk, 1990),was held by the Hydrodynamics Institute under the support of the Presidium of the Siberian Branch of the USSR Academy of Sciences to stimulate the international cooperation of the leading international centers. In the framework of this Conference the Round Table seminar was held by Prof. A. Borissov and Prof. V. Mi trofanov devoted to "Dynamic Structure of Detonation in Gaseous and Dispersed Media". The idea to hold such Round Table was supported by Chairman of Organizing Committee academician Prof. V.Titov from Hydrodynamics Institute, and academician Prof. V. Nakoryakov and also his Institute of Thermophysics. The main ideas discussed at the Round Table were presented in the form of papers which reflected present situation of the problem of dynamic structure of the detonation waves in gaseous and dispersed media. The basic experimental facts concerning of complicated mul ti dimensional non-stationary structure both of the detonation wave and its front surface, generation of the cell structure, the effect of transverse waves, obstacles, channel geometry etc. on the transition from dynamic regime to stationary structure are represented in the fist three papers.
Recent Developments in Turbulence Management
Meeting Proceedings
AvK-.S. Choi
Inbunden, Engelska, 1991
869 kr
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The subjects covered in this volume include riblets, LEBUs (Large Eddy Break-Up devices), surface roughness, compliant surfaces and polymer additives. Riblets seem to be one of the most extensively studied devices in the past years. Reflecting this situation in the European Community, there are six papers on riblets covering their practical applications to aircraft and to a model ship, near-wall coherent structure of boundary layer and effects of flow three-dimensionality. Possibility of heat-transfer enhancement with riblets and potential use in the laminar flow are also investigated. An analytical model is developed for the boundary-layer with a LEBU device. Physical mechanisms of turbulent skin-friction reduction with LEBUs are reviewed in the light of some recent studies. The d-type roughness is investigated in conjunction with riblets for drag reduction. A correlation method of roughness parameters with the drag penalties is also presented. Two papers are devoted to further theoretical development of compliant surfaces in transition delay.Probably one of the most exciting recent developments in turbulence management is the use of compliant surfaces in the turbulent boundary layer. There are two papers describing some theoretical experimental work carried out on this subject in the U.S.S.R. Some further studies on the effects of polymer additives are also presented. The volume concludes with an edited record of the lively panel discussions which provided a useful forum to exchange views, plans for future research, collaborative work and industrial applications of drag reduction techniques.
Pipeline Systems
AvBryan Coulbeck,Edward Evansm. fl.
Inbunden, Engelska, 1992
2 162 kr
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This volume presents the edited Proceedings of the International Conference on Pipeline Systems held in Manchester 24-26 March, 1992. It provides a forum for the exchange of technical and operational information across a wide range of pipeline activities. The overall theme of the contributions is the optimization of pipeline systems, through design analysis, component specification, operational strategies and performance evaluation, in order to minimize both risk and the lifetime cost of ownership. Emphasis is also placed on important developing technologies with consideration for computational equipment and methods. Contributions are collated in the main categories of design, operation and performance. In each case, aspects of safety, security and economy are covered with a mix of analytical techniques, computer implementation, validation and results. The book is intended for use by civil, hydraulic and petroleum engineers.
Fluid Sealing
AvB. Nau
Inbunden, Engelska, 1992
3 240 kr
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This volume presents the edited "Proceedings of the 13th International Conference on Fluid Sealing held in Brugge, 7-9 April, 1992. The overall theme of the contributions is the improvement of sealing reliability and effectiveness. Emission control is a critical function in plant, equipment, machinery and transportation systems. Increasingly it is becoming the focus of legislation to control environmental contamination. Engineering managers should therefore become fully conversant with the latest technology for ensuring seal reliability. The contributions collated in ths volume describe developments and insight into the application of the best available seal-technology. The papers are arranged in the main categories of lip seals, statis seals, mechanical seal research, mechanical seal application and performance, mechanical seal qualification, value emissions and clearance seals, materials and thermal science, fluid power and packings. The book is intended for use by mechanical, production, civil and safety engineers.
Del 9 - Fluid Mechanics and Its Applications
Computational Methods in Hypersonic Aerodynamics
AvT.K.S. Murthy
Inbunden, Engelska, 1992
2 162 kr
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This book contains chapters written by some eminent scientists and researchers on Computational Methods in Hypersonic Aerodynamics and forms a natural sequel to the earlier publications on Computational Methods in Potential Flow (1986) and Computational Methods in Viscous Aerodynamics (1990). In this book, the earlier attempts at the solution of the highly nonlinear Navier-Stokes equations are extended to the aerothermodynamics of flow in the hypersonic regime, including the effects of viscosity on the physical and chemical processes of high-temperature nonequilibrium flow at very high speeds, such as vibrational excitation, dissociation and recombination, ionization and radiation, as well as real gas effects and the effects of high temperature and low density. The book has been prepared as a valuable contribution to the state-of-the-art on computational methods in hypersonic aerodynamics. All the chapters have been written by eminent scientists and researchers well known for their work in this field.
Del 10 - Fluid Mechanics and Its Applications
Fluid Mechanics of Mixing
Modelling, Operations and Experimental Techniques
AvR. King
Inbunden, Engelska, 1992
2 162 kr
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This volume is a selection of the material presented at the 7th European Mixing Congress. It is concerned exclusively with mixing in circular section vessels, using centrally mounted paddles or similar impellers. The contents are arranged under three classifications: Modelling of Mixing Processes, Mixing Operations and Experimental Techniques. The classifications result in the original material appearing in a different order to that of the Congress. This arrangement is intended to assist the reader in identifying the topic area by function or application, rather than by technology. In this book the section on Modelling contains papers which focus on the representation of the mixing process, whether by equation, scale-up criteria, or fluid dynamic simulation. Similarly, Mixing Operations are concerned with the application or function of the mixing process, such as mass transfer, heat transfer or mixing time. Experimental Techniques addresses the tools the researcher needs to use at the data gathering experimental stage. It collects together advances made in the various methods used by some of the foremost researchers, and indicates those areas still in need of additional instrumentation or methods of data reduction. The book is intended for researchers, designers and users of mixing equipment, and for those planning research and development programmes and who wish to keep up to date with advances in the basic technology and its applications.
Del 11 - Fluid Mechanics and Its Applications
Shock Dynamics
AvZ. Han,X. Yin
Inbunden, Engelska, 1993
3 024 kr
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This book was written as a graduate student course--Shock Dynamics. Up to now, the first author has taught this course to the graduate students in the field of Fluid Mechanics, Department of Modern Mechanics, University of Science and Technology of China for seven times. In the spring semester 1989, during his visit to the United States, the first author taught this course to the graduate students of Department of Mathemat ics, University of Colorado at Denver. At the same time, he gave a series of four lectures on Shock Dynamics to the graduate students of Department of Aerospace Engineering Sciences, University of Colorado at Boulder. In 1991, during the first author's visit to Japan, he gave some lectures on Shock Dynamics in Tohoku University, University of Tokyo and Kyushu Uni versity. The dynamic phenomena of shock waves such as propagation, diffraction, reflection, refraction and interaction of shock waves may be studied by using experimental methods, numerical calculations and theoretical analyses. Although the detailed flow patterns of phenomena of shock motion can be obtained by using experimental methods and numerical calculations of solving Euler Equation or Navier-Stokes Equation, for example, the diffractions of shock waves by wedges form various phenomena of reflection--RR, SMR, CMR and DMR, we also need to analyse the process of the formation of shock waves in various phenomena of diffraction, reflection and interaction by using theoretical methods.
Del 12 - Fluid Mechanics and Its Applications
Hydrocyclones
Analysis and Applications
AvL. Svarovsky,M.T. Thew
Inbunden, Engelska, 1992
1 623 kr
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It is with great pleasure and satisfaction that we introduce this volume which comprises the papers accepted for the 4th International Conference on Hydrocyclones held in Southampton from 23rd to 25th September 1992. As the name implies, this is the fourth Conference in the series, with the previous ones held in Cambridge in 1980, Bath in 1984 and Oxford in 1987. The papers cover a wide span of activities, from fundamental research to advances in industrial practice and, as in the earlier volumes, make a significant contribution of lasting value to the technical literature on hydrocyclones. Hydrocyclones continue to widen their appeal to engineers; besides their traditional role in mineral processing they now attract a lot of attention in chemical engineering, the oil and gas industry, power generation, the food industry, textiles, metal working, waste water treatment, pharmaceuticals, biotechnology and other industries. The reason for this continuously increasing attention is, as David Parkinson (General Manager of Conoco (UK)) said recently, that" ... a hydrocyclone is an engineering dream, a machine with no moving parts." Yet as this Volume clearly shows, the hydrocyclone can do so many things and do them well, whether the application is in solid-liquid, liquid-liquid or liquid-gas separation.
Jet Cutting Technology
AvA. Lichtarowicz
Inbunden, Engelska, 1992
3 240 kr
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This volume contains papers presented at the 11th International Conference on Jet Cutting Technology, held at St Andrews, Scotland, on 8-10 September 1992. Jetting techniques have been successfully applied for many years in the field of cleaning and descaling. Today, however, jet cutting is used in operations as diverse as removing cancerous growths from the human body, decommissioning subsea installations and disabling explosive munitions. This diversity is reflected in the papers presented at the conference. They are divided into several main sections: materials, fluid mechanics, mining and quarrying, civil engineering, new developments, petrochem, cleaning and surface treatment and manufacturing. This work should be of interest to researchers, developers and manufacturers of systems, equipment users and contractors.
Del 14 - Fluid Mechanics and Its Applications
Flow Visualization and Image Analysis
AvF.T. Nieuwstadt
Inbunden, Engelska, 1992
2 162 kr
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Progress in fluid mechanics depends heavily on the availability of good experimental data which can inspire new ideas and concepts but which are also necessary to check and validate theories and numerical calculations. With the advent of new recording and image analysis techniques new and promising experimental methods in fluid flows have presented themselves which are rather newly developed techniques such as particle tracking velocimetry (PTV), particle image velocimetry (PIV) and laser fluorescene (LIF). This volume presents state-of-the-art research on these techniques and their application to fluid flow. Selected papers from the EUROMECH conference on Image Analysis are published in this volume.
Del 15 - Fluid Mechanics and Its Applications
Floods and Flood Management
AvA. Saul
Inbunden, Engelska, 1992
3 240 kr
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In recent years there have been a number of catastrophic floods that have resulted in a tragic loss of life. These natural disasters highlight the need to further understand the occurrence phenomena, to improve forecasting techniques, and to develop procedures and contingency plans to minimise the flood impact. This volume contains contributions from the 3rd International Conference on Floods and Flood Management held in Florence in November 1992. The volume is timely and provides an important overview for engineers, scientists, managers and researchers of the latest developments in technology, analysis and management.
Instabilities and Turbulence in Engineering Flows
AvD. Ashpis,Thomas B. Gatskim. fl.
Inbunden, Engelska, 1993
2 162 kr
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This book contains contributions by colleagues, former students and friends of Professor Eli Reshotko in celebration of his 60th birthday. Since Professor Reshotko's scientific and engineering contributions have been in the areas of hydrodynamic stability, transition to turbulence, and boundary layer flows, it is only appropriate that the articles in this volume be devoted to these and related topics. The first two sections focus on instabilities and transition in subsonic and supersonic flows, respectively. The third section deals with developing turbulence, while the final section treats related problems in engineering fluid mechanics. The diversity and scope of the articles contained herein exemplify the insight and expertise required in the study of transitional and turbulent flows today -- traits which also exemplify Eli Reshotko's contributions to these fields.
Atmospheric Boundary Layer for Engineers
AvR. S. Azad
Inbunden, Engelska, 1993
2 162 kr
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This text on the atmospheric boundary layer assumes no previous knowledge of the subject and the material has been selected to introduce the reader to the important ideas and applications. It should be particularly appropriate as an introduction to the subject for engineers. The first four chapters define and describe the atmospheric boundary layer. Thermodynamic and fluid kinematic considerations are introduced, and one chapter is devoted to the description of turbulent motion in the boundary layer of the atmosphere. The fifth chapter is a very useful presentation on dimensional methods and similarity. In Chapter 6, the complex turbulent flow over the surface of the earth is approximated by flow over the half-space of a flat plate for a neutrally stratified fluid. The final chapter describes the first 50 meters, the so-called surface layer, with reference to asymptotic theories and reliable observations.
Advances in Turbulence IV
Proceedings of the fourth European Turbulence Conference 30th June - 3rd July 1992
AvF.T. Nieuwstadt
Inbunden, Engelska, 1993
3 240 kr
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Containing contributions from the fourth European Turbulence Conference held in Delft on 30 June-3 July 1992, this volume contains papers grouped into the following main topics of the meeting: Dynamical Systems and Transition; Statistical Physics and Turbulence; Experiments and Novel Experimental Techniques; Particles and Bubbles in Turbulence; Simulation Methods; Coherent Structures; Turbulence Modelling and Compressibility Effects. This volume is a reference work designed for research workers in the field of fluid turbulence.
Further Developments in Turbulence Management
AvK.Krishna Prasad
Inbunden, Engelska, 1993
869 kr
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Shaped Crystal Growth
AvV.A. Tatarchenko
Inbunden, Engelska, 1993
2 162 kr
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The monograph "Shaped Crystal Growth" by V. A. Tatarchenko is the first systematic of the macroscopic crystallization theory. The theory is based on the stable statement growth conception, which means that self-stabilization is present in the system, with growth parameter deviations occurring under the action of external perturbations attenuating with time. The crystallization rate is one of the parameters responsible for crystal defect formation. Steady-state crystal growth means that crystallization rate internal stabilization is present, thus allowing more perfect crystals to grow. Most important is the fact that the crystal shape (an easily observed parameter) is one of the stable-growth characteristics when growing crystals without any contact with the crucible walls. This means that constant-cross-section crystal growth is to a certain extent evidence of crystallization process stability. The principles of the stable crystal growth theory were developed by the author of the monograph in the early 1970s. Due to the efforts over the past 20 years of V. A. Tatarchenko, his disciples (V. A. Borodin, S. K. Brantov, E. A. Brener, G. I. Romanova, G. A. Satunkin et al) and his followers (B. L. Timan, 0. V. Kolotiy et al) the theory has been completed, which is demonstrated by this monograph. The characteristic feature of the theory is its trend towards solving practical problems that occur in the process of crystal growth.
Eddy Structure Identification in Free Turbulent Shear Flows
Selected Papers from the IUTAM Symposium entitled: “Eddy Structures Identification in Free Turbulent Shear Flows” Poitiers, France, 12–14 October 1992
AvInternational Union of Theoretical and A,J.P. Bonnetm. fl.
Inbunden, Engelska, 1993
2 162 kr
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The existence and crucial role played by large-scale, organized motions in turbulent flows are now recognized by industrial, applied and fundamental researchers alike. It has become increasingly evident that coherent structures influence mixing, noise, vibration, heat transfer and drag. This volume contains selected papers from the IUTAM symposium entitled "Eddy Structure Identification in Free Turbulent Shear Flows" which was held in Poitiers, France, October 12-14, 1992. The purpose of the IUTAM symposium was to address some important questions, which are documented in this volume: What is the state of the art of structure identification?; How do these approaches work?; How do the results from different techniques compare with one another?; What kind of information can be obtained from the various methods (e.g. instantaneous results, vorticity, averages, statistics)?; What are the new directions in detection methods and, correspondingly, what are their implications for turbulent flow analysis and prediction methods?This text should contribute to the knowledge of coherent structure identification processes and should help guide future experimental, numerical and theoretical research in this area. Turbulence researchers should find this volume a useful reference.
Interaction of Shock Waves
AvR. S. Srivastava
Inbunden, Engelska, 1994
1 623 kr
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This volume deals with problems relating to the interaction of shock waves, with an emphasis on their diffraction. The contents are divided into nine chapters, dealing with the reflection of shock waves, the diffraction of normal and oblique shock waves, including the effects of yawed wedges, shock interaction with a moving aerofoil and arbitrary flat surfaces. The book covers in detail the experimental and theoretical approaches to the subject which have been found fruitful, and presents an authoritative account of the present status of reseach. It is suitable for research mathematicians and engineers whose work involves fluid mechanics, aerodynamics, and compressible flow.
Bubble Dynamics and Interface Phenomena
Proceedings of an IUTAM Symposium held in Birmingham, U.K., 6–9 September 1993
AvJohn R. Blake,Jeremy M. Boulton-Stonem. fl.
Inbunden, Engelska, 1994
3 240 kr
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This volume covers topics in cavitation bubble dynamics, sound and wave propagation in bubbly mixtures, bubbles in flow, sonoluminescence, acoustic cavitation, underwater explosions, and bursting bubbles at a free surface. The physics and chemistry of sonoluminescence and the modelling of jet impact during bubble collapse are examples of issues which enjoy considerable attention. One of the most exciting areas of contemporary chemistry and physics is single bubble picosecond sonoluminescence. The high pressures and temperatures generated over picoseconds, coupled with previously unachievable rates of reaction have recently attracted attention. High temperatures and pressures are often associated with symmetric bubble collapse; however, asymmetric collapse can typically lead to the development of a damaging ultra-high-speed liquid jet that pierces the collapsing bubble. Occurrence of this high-speed jet was reported at both the microscale in laser surgery and the large scale in underwater explosions, but it is also frequently present in collapsing cavitation bubbles.The volume contains information on the latest research on a range of topics in bubble dynamics, underwater acoustics and multiphase flow and is a reference for scientists and engineers conducting research in these areas.
Advances in Turbulence V
Proceedings of the Fifth European Turbulence Conference, Siena, Italy, 5–8 July 1994
AvRoberto Benzi
Inbunden, Engelska, 1995
2 162 kr
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Under the auspices of the Euromech Committee, the Fifth European Turbulence Conference was held in Siena on 5-8 July 1994. Following the previous ETC meeting in Lyon (1986), Berlin (1988), Stockholm (1990) and Delft (1992), the Fifth ETC was aimed at providing a review of the fundamental aspects of turbulence from a theoretical, numerical and experimental point of view. In the magnificent town of Siena, more than 250 scientists from all over the world, spent four days discussing new ideas on turbulence. As a research worker in the field of turbulence, I must say that the works presented at the Conference, on which this book is based, covered almost all areas in this field. I also think that this book provides a major opportunity to have a complete overview of the most recent research works. I am extremely grateful to Prof. C. Cercignani, Dr. M. Loffredo, and Prof. R. Piva who, as members of the local organizing committee, share the success of the Conference. I also want to thank Mrs. Liu' Catena, for her invaluable contribution to the work done by the local organizing committee and the European Turbulence Committee in the scientific organization of the meeting. The "Servizio Congressi" of the University of Siena provided perfect organization in Siena and wonderful hospitality. The Conference has been supported by CNR, Cira, Alenia, the Universities of Rome "Tor Vergata" and "La Sapienza".
Del 25 - Fluid Mechanics and Its Applications
Vortex Processes and Solid Body Dynamics
The Dynamic Problems of Spacecrafts and Magnetic Levitation Systems
AvB. Rabinovich,A.I. Lebedevm. fl.
Inbunden, Engelska, 1994
2 162 kr
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... a wise man knows all things in a manner in which this is possible, not, however, knowing them individually. Aristotle. Metaphysics * The problem of consideration of vortex fields' influence on solid body dynamics has a long history. One constantly comes upon it in flight dynamics of airplanes, helicopters, and other flying vehicles (FV) moving in the atmosphere, in dynamics of ships with hydrofoils, and in dynamics of rocket carriers (RC) and spacecrafts (SC) with liquid-propellant rocket engines (LPRE), that are equipped with special damping devices and other structural elements inside fluid tanks. Similar problems occur when solving problems related to attitude control and stabilization of artificial Earth satellites (AES) and spacecrafts with magnetic (electro magnetic) systems, in conducting elements of which eddy currents are induced while control of those vehicles' angular position. It is also true with special test facilities for dynamic testing of space vehicles and their systems, with modern high-speed magnetic suspension transport systems (those based on the phenomenon of 'magnetic levitation'), with generators having rotors carried in 'magnetic bearings', and so on.
Del 26 - Fluid Mechanics and Its Applications
Direct and Large-Eddy Simulation I
Selected papers from the First ERCOFTAC Workshop on Direct and Large-Eddy Simulation
AvPeter R. Voke,Leonhard Kleiserm. fl.
Inbunden, Engelska, 1994
2 162 kr
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It is a truism that turbulence is an unsolved problem, whether in scientific, engin eering or geophysical terms. It is strange that this remains largely the case even though we now know how to solve directly, with the help of sufficiently large and powerful computers, accurate approximations to the equations that govern tur bulent flows. The problem lies not with our numerical approximations but with the size of the computational task and the complexity of the solutions we gen erate, which match the complexity of real turbulence precisely in so far as the computations mimic the real flows. The fact that we can now solve some turbu lence in this limited sense is nevertheless an enormous step towards the goal of full understanding. Direct and large-eddy simulations are these numerical solutions of turbulence. They reproduce with remarkable fidelity the statistical, structural and dynamical properties of physical turbulent and transitional flows, though since the simula tions are necessarily time-dependent and three-dimensional they demand the most advanced computer resources at our disposal. The numerical techniques vary from accurate spectral methods and high-order finite differences to simple finite-volume algorithms derived on the principle of embedding fundamental conservation prop erties in the numerical operations. Genuine direct simulations resolve all the fluid motions fully, and require the highest practical accuracy in their numerical and temporal discretisation. Such simulations have the virtue of great fidelity when carried out carefully, and repre sent a most powerful tool for investigating the processes of transition to turbulence.
Del 27 - Fluid Mechanics and Its Applications
Hydrodynamic Propulsion and Its Optimization
Analytic Theory
AvJ.A. Sparenberg
Inbunden, Engelska, 1994
2 162 kr
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HYDRODYNAMIC PROPULSION AND ITS OPTIMIZATION ANALYTIC THEORY Hydrodynamic propulsion has been of major interest ever since craft took to the water. In the course of time, many attempts have been made to invent, develop, or to improve hydrodynamic propulsion devices. Remarkable achievements in this field were made essentially by experienced individuals, who were in need of reliable propulsion units such as paddle wheels, sculling devices, screw propellers, and of course, sails. The problem of minimizing the amount of input energy for a prescribed effective output was first investigated seriously at the beginning of this century. In 1919, BETZ presented a paper on air-screw propellers with minimum consumption of energy which could be applied to ship-screw propellers also. Next, attempts were made to optimize hydrodynamic propulsion units. Ensuing investigations concerned the optimization of the hydrodynamic system: ship-propeller. The first simple theory of ship propulsion which was presented considered more or less only thrust augmentation, wake processing and modification of propeller characteristics when operating behind the ships hull. This theory has been little improved meanwhile and is still useful, particularly with regard to practical ship design and for evaluating results of ship model tests. However, this theory is not adequate for optimization procedures necessary for high-technology propulsion, particularly for ship propellers utilizing propulsion improving devices such as tip end plates or tip fins at the propeller blades, spoilers in front of the propeller, asymmetrical stern etc.
Del 28 - Fluid Mechanics and Its Applications
IUTAM Symposium on Numerical Simulation of Non-Isothermal Flow of Viscoelastic Liquids
Proceedings of an IUTAM Symposium held in Kerkrade, The Netherlands, 1–3 November 1993
AvJ.F. Dijksman,G.D.C. Kuiken
Inbunden, Engelska, 1995
1 085 kr
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During the last decades a considerable effort has been made on the computation of the isothermal flow of viscoelastic fluids. In fact the activities related to this particular field of non-Newtonian fluid mechanics have focused on the following questions: which type of constitutive equation describes non-Newtonian fluid behaviour; how to measure fluid parameters; and what type of computational scheme leads to reliable, stable and cost-effective computer programs. During the same period, typical non-Newtonian fluid phenomena have been experimentally examined, such as the flow through a "four-to-one" contraction, the flow around a sphere or separation flow, providing fresh challenges for numerical modellers. Apart from momentum transport, however, fluid flow is strongly influenced by heat treansport in most real industrial operations in which non-Newtonian fluids are processed. The IUTAM Symposium on Numerical Simulation of Nonisothermal Flow of Viscoelastic Liquids held at Rolduc Abbey in Kerkrade, the Netherlands, November 1-3 1994, was organized to monitor the state of affairs in regard to the influence of non-isothermal effects on the flow of a viscoelastic liquid.This collection of papers gives an overview of what has been achieved so far in this rapidly emerging field in non-Newtonian fluid mechanics.
Convection in Rotating Fluids
AvB.M. Boubnov,Georgi S. Golitsyn
Inbunden, Engelska, 1995
2 162 kr
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Spatial inhomogeneity of heating of fluids in the gravity field is the cause of all motions in nature: in the atmosphere and the oceans on Earth, in astrophysical and planetary objects. All natural objects rotate and convective motions in rotating fluids are of interest in many geophysical and astrophysical phenomena. In many industrial applications (such as crystal growth and semiconductor manufacturing), heating and rotation are the main mechanisms defining the structure and quality of the material. Depending on the geometry of the systems and the mutual orientation of temperature and gravity field, a variety of phenomena will arise in rotating fluids, such as regular and oscillating waves, intensive solitary vortices and regular vortex grids, interacting vortices and turbulent mixing. In this book, the authors elucidate the physical essence of these phenomena, determining and classifying flow regimes in the space of similarity numbers. The theoretical and computational results are presented only when the results help to explain basic qualitative motion characteristics.The book should be of interest to researchers and graduate students in fluid mechanics, meteorology, oceanography and astrophysics, crystallography, heat and mass transfer.
Fluid Vortices
Kluwer Academic Publishers
1995
3 820 kr
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Fluid Vortices is a comprehensive, up-to-date, research-level overview covering all salient flows in which fluid vortices play a significant role. The various chapters have been written by specialists from North America, Europe and Asia, making for unsurpassed depth and breadth of coverage. Topics addressed include fundamental vortex flows (mixing layer vortices, vortex rings, wake vortices, vortex stability, etc.), industrial and environmental vortex flows (aero-propulsion system vortices, vortex-structure interaction, atmospheric vortices, computational methods with vortices, etc.), and multiphase vortex flows (free-surface effects, vortex cavitation, and bubble and particle interactions with vortices). The book can also be recommended as an advanced graduate-level supplementary textbook. The first nine chapters of the book are suitable for a one-term course; chapters 10--19 form the basis for a second one-term course.

Fluid Mechanics and Its Applications – serie

Fundamentals of Turbomachines

Turbulence and Coherent Structures

Magnetohydrodynamics

Turbulence Control by Passive Means

Dynamic Structure of Detonation in Gaseous and Dispersed Media

Recent Developments in Turbulence Management

Pipeline Systems

Fluid Sealing

Computational Methods in Hypersonic Aerodynamics

Fluid Mechanics of Mixing

Shock Dynamics

Hydrocyclones

Jet Cutting Technology

Flow Visualization and Image Analysis

Floods and Flood Management

Instabilities and Turbulence in Engineering Flows

Atmospheric Boundary Layer for Engineers

Advances in Turbulence IV

Further Developments in Turbulence Management

Shaped Crystal Growth

Eddy Structure Identification in Free Turbulent Shear Flows

Interaction of Shock Waves

Bubble Dynamics and Interface Phenomena

Advances in Turbulence V

Vortex Processes and Solid Body Dynamics

Direct and Large-Eddy Simulation I

Hydrodynamic Propulsion and Its Optimization

IUTAM Symposium on Numerical Simulation of Non-Isothermal Flow of Viscoelastic Liquids

Convection in Rotating Fluids

Fluid Vortices