IUTAM Symposium Transsonicum IV

Author: H. Sobieczky
Publisher: Springer Science & Business Media
ISBN: 9401000174
Format: PDF, Docs
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"Symposium Transsonicum" was founded by Klaus Oswatitsch four decades ago when there was clearly a need for a systematic treatment of flow problems in the higher speed regime in aeronautics. The first conference in 1962 brought together scientists concerned with fundamental problems involving the sonic flow speed regime. Results of the conference provided an understanding of some basic tran sonic phenomena by proposing mathematical methods that allowed for the de velopment of practical calculations. The "Transonic Controversy" (about shock free flows) was still an open issue after this meeting. In 1975 the second symposium was held, by then there was much understanding in how to avoid shocks in a steady plane flow to be designed, but still very little was known in unsteady phenomena due to a lack of elucidating experiments. A third meeting in 1988 reflected the availability oflarger computers which allowed the numerical analysis of flows with shocks to a reasonable accuracy. Because we are trying to keep Oswatitsch's heritage in science alive especially in Gottingen, we were asked by the aerospace research community to organize another symposium. Much had been achieved already in the knowledge, techno logy and applications in transonics, so IUT AM had to be convinced that a fourth meeting would not just be a reunion of old friends reminiscing some scientific past. The scientific committee greatly supported my efforts to invite scientists ac tively working in transonic problems which still pose substantial difficulties to ae rospace and turbomachinery industry.

IUTAM Symposium on Reynolds Number Scaling in Turbulent Flow

Author: Alexander J. Smits
Publisher: Springer Science & Business Media
ISBN: 9400709978
Format: PDF
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This volume presents selected papers from the IUTAM Symposium on Reynolds Number Scaling in Turbulent Flow, convened in Princeton, NJ, USA, September I1-13, 2002. The behavior ofturbulence at high Reynolds number is interesting from a fundamental point of view, in that most theories of turbulence make very specific predictions in the limit of infinite Reynolds number. From a more practical point of view, there exist many applications that involve turbulent flow where the Reynolds numbers are extremely large. For example, large vehicles such as submarines and commercial transports operate at Reynolds 9 numbers based on length ofthe order oft0 , and industrial pipe flows cover a 7 very wide range of Reynolds numbers up to 10 • Many very important applications of high Reynolds number flow pertain to atmospheric and other geophysical flows where extremely high Reynolds numbers are the rule rather than the exception, and the understanding of climate changes and the prediction of destructive weather effects hinges to some extent on our appreciation ofhigh-Reynolds number turbulence behavior. The important effects of Reynolds number on turbulence has received a great deal of recent attention. The objective of the Symposium was to bring together many of the world's experts in this area to appraise the new experimental results, discuss new scaling laws and turbulence models, and to enhance our mutual understanding of turbulence.

IUTAM Symposium on Integrated Modeling of Fully Coupled Fluid Structure Interactions Using Analysis Computations and Experiments

Author: Haym Benaroya
Publisher: Springer Science & Business Media
ISBN: 9781402018060
Format: PDF
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This plenary paper and the accompanying presentation have highlighted field problems involving fluid-structure interaction over a wide span of Navy operations. Considering the vast size and versatility of the Navy's inventory, the cases presented represent examples of a much larger problem. But even this limited set provides sufficient evidence that fluid-structure interaction does hinder the Navy's ability to accomplish its missions. This survey has also established that there are no accurate and generally applicable design tools for addressing these problems. In the majority of cases the state-of-practice is to either make ad-hoc adjustments and estimates based on historical evidence, or conduct expensive focused tests directed at each specific problem and/or candidate solution. Unfortunately, these approaches do not provide insight into the fundamental problem, and neither can be considered reliable regarding their likelihood of success. So the opportunities for applying computational fluid-structure interaction modeling to Navy problems appear limitless. Scenarios range from the "simple" resonant strumming of underwater and in-air cables, to the "self-contained" flow field and vibration of aircraft/ordnance bodies at various Mach numbers, to violent underwater transient detonations and local hull structural collapse. Generally applicable and computationally tractable design-oriented models for these phenomena are of course still far in the future. But the Navy has taken the first steps in that direction by sponsoring specialized numerical models, validation experiments tailored for specific applications, and conferences such as this one.

Biomechanics of Hearing

Author: John J. Rosowski
Publisher: S Karger Ag
ISBN:
Format: PDF, ePub
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How does the structure of the ear define normal auditory function and how do pathologically and surgically induced changes in the ear structure change hearing? This volume presents the results of the Euromech Colloquium on 'Biomechanics of Hearing'. Attended by experts - engineers, physicists, audiologists - active in different fields of modern measurement techniques, modeling and simulation and microsurgery with applications to hearing. Common themes were the description of auditory function on the basis of mathematical models of the middle and inner ear and identification, i.e. the use of measurements of middle and inner ear function to evaluate the parameters of the suggested models for normal, pathological and reconstructed ears and to refine them in their structure. The collected papers point out the positive accomplishments that can be derived from quantitative multidisciplinary approaches to hearing science. This volume is indispensable reading for audiologists, physicians and hearing scientists interested in the mechanics and acoustics of the auditory periphery.

Racial and Cultural Minorities

Author: George Eaton Simpson
Publisher: Springer Science & Business Media
ISBN: 1489905510
Format: PDF, ePub, Mobi
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We need scarcely note that the topic of this book is the stuff of headlines. Around the world, political, economic, educational, military, religious, and social relations of every variety have a racial or ethnic component. One cannot begin to understand the history or contemporary situation of the United States, the Soviet Union, China, Zimbabwe, South Africa, Great Britain, Lebanon, Mexico, Canada-indeed, almost any land-without careful attention to the influence of cultural and racial divisions. Preparation of this new edition has brought a strong sense of deja vu, with regard both to the persistence of old patterns of discrimination, even if in new guises, and also to the persistence of limited and constraining explanations. We have also found, however, rich new empirical studies, new theoretical perspectives, and greatly expanded activity and analyses from members of minority groups. Although this edition is an extensive revision, with reference both to the data used and the theoretical approaches examined, we have not shifted from our basically analytical perspective. We strongly support efforts to reduce discrimination and prejudice; but these can be successful only if we try to understand where we are and what forces are creating the existing situation. We hope to reduce the tendency to use declarations and condem nations of other persons' actions as substitutes for an investigation of their causes and consequences.

Aerodynamics of Wings and Bodies

Author: Holt Ashley
Publisher: Courier Corporation
ISBN: 0486648990
Format: PDF, ePub, Mobi
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This excellent, innovative reference offers a wealth of useful information and a solid background in the fundamentals of aerodynamics. Fluid mechanics, constant density inviscid flow, singular perturbation problems, viscosity, thin-wing and slender body theories, drag minimalization, and other essentials are addressed in a lively, literate manner and accompanied by diagrams.

Some Improperly Posed Problems of Mathematical Physics

Author: Michail M. Lavrentiev
Publisher: Springer Science & Business Media
ISBN: 3642882102
Format: PDF, Kindle
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This monograph deals with the problems of mathematical physics which are improperly posed in the sense of Hadamard. The first part covers various approaches to the formulation of improperly posed problems. These approaches are illustrated by the example of the classical improperly posed Cauchy problem for the Laplace equation. The second part deals with a number of problems of analytic continuations of analytic and harmonic functions. The third part is concerned with the investigation of the so-called inverse problems for differential equations in which it is required to determine a dif ferential equation from a certain family of its solutions. Novosibirsk June, 1967 M. M. LAVRENTIEV Table of Contents Chapter I Formu1ation of some Improperly Posed Problems of Mathematic:al Physics § 1 Improperly Posed Problems in Metric Spaces. . . . . . . . . § 2 A Probability Approach to Improperly Posed Problems. . . 8 Chapter II Analytic Continuation § 1 Analytic Continuation of a Function of One Complex Variable from a Part of the Boundary of the Region of Regularity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 § 2 The Cauchy Problem for the Laplace Equation . . . . . . . 18 § 3 Determination of an Analytic Function from its Values on a Set Inside the Domain of Regularity. . . . . . . . . . . . . 22 § 4 Analytic Continuation of a Function of Two Real Variables 32 § 5 Analytic Continuation of Harmonic Functions from a Circle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 § 6 Analytic Continuation of Harmonic Function with Cylin drical Symmetry . . . . . . . . . . . . . . . . . . . . . . . . . 42 Chapter III Inverse Problems for Differential Equations § 1 The Inverse Problem for a Newtonian Potential . . . . . . .