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Author: Abdelkhalak El Hami
Publisher: John Wiley & Sons
ISBN: 1119388910
Category : Science
Languages : en
Pages : 236
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Book Description
This book is dedicated to the general study of fluid structure interaction with consideration of uncertainties. The fluid-structure interaction is the study of the behavior of a solid in contact with a fluid, the response can be strongly affected by the action of the fluid. These phenomena are common and are sometimes the cause of the operation of certain systems, or otherwise manifest malfunction. The vibrations affect the integrity of structures and must be predicted to prevent accelerated wear of the system by material fatigue or even its destruction when the vibrations exceed a certain threshold.
Author: Mustapha Benaouicha
Publisher:
ISBN:
Category :
Languages : fr
Pages : 176
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Book Description
Ce mémoire est une contribution aux études de problèmes d'Interaction Fluide-Structure (IFS). Le code Castem est utilisé afin de créer un outil numérique libre et accessible pour traiter, dans sa globalité, le problème de modélisation d'un barrage ou réservoir souple flottant. Dans un premier temps, nous avons effectué la validation de Castem en absence de couplage fluide-structure. Nous avons considéré une discrétisation spatiale en éléments finis des équations de Navier-Stokes adimensionnelles, le schéma d'Euler implicite pour la discrétisation en temps et la méthode de projection pour le couplage vitesse-pression. La validation s'est portée sur des cas d'écoulement laminaire autour d'un cylindre de section circulaire et carrée. Les résultats obtenus (nombre de Strouhal, coefficients de traînée et de portance, ...) sont très proches des résultats expérimentaux ou issus d'autres calculs numériques réalisés avec d'autres codes de calcul. Ensuite, nous avons procédé à la mise en œuvre des algorithmes de couplage Fluide-Structure sur plusieurs configurations, en laissant les mêmes caractéristiques des schémas de discrétisation des équations du fluide que précédemment. Dans ce cas, on utilise la formulation ALE pour les équations du fluide. Nous avons étudié les oscillations, forcées et libres, d'un cylindre dans un domaine fluide annulaire, en considérant les cas d'un fluide parfait puis d'un fluide visqueux. Dans le cas des oscillations forcées où le mouvement harmonique du cylindre est imposé, les résultats obtenus (coefficient de masse ajoutée, efforts fluides sur le cylindre, ...) comparés aux résultas données par les modèles de Fritz, dans le cas d'un fluide non visqueux, et Sinyavaski ou Chen, dans le cas d'un fluide visqueux, sont assez précis. Dans le cas des oscillations libres où le mouvement du cylindre est déterminé par l'action couplée fluide-solide, nous avons constaté que l'algorithme de couplage implicite est celui qui prédit le mieux les oscillations de la structure. Nous étions néanmoins contraint d'introduire des sous-pas de temps pour le solide afin d'obtenir de meilleurs résultats. Le code développé dans Castem, a été aussi testé avec succès pour prédire les phénomènes liés au cas d'un cylindre en oscillations dans un écoulement laminaire incompressible (accrochage fréquentiel, modes d'émission de tourbillons, ...).Pour l'application, une configuration proche de l'objectif initial de la thèse, qui est la modélisation des barrages flottants et réservoirs souples, a été traitée. L'objet de cette application est l'étude du déplacement d'un anneau complètement immergé dans un fluide en écoulement laminaire et amarré par un câble à la paroi inférieure du domaine fluide. Enfin, une introduction à une méthode de réduction de modèle en Interaction Fluide-Structure, la POD, est présentée. Il s'agit d'une méthode déjà utilisée en mécanique des fluides et en mécanique des structures mais en stade de développement en IFS. Elle a été appliquée à certaines configurations étudiées précédemment et les résultats obtenus sont prometteurs.
Author: Abdelkhalak El Hami
Publisher: John Wiley & Sons
ISBN: 1848219393
Category : Science
Languages : en
Pages : 284
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Book Description
This book is dedicated to the general study of fluid structure interaction with consideration of uncertainties. The fluid-structure interaction is the study of the behavior of a solid in contact with a fluid, the response can be strongly affected by the action of the fluid. These phenomena are common and are sometimes the cause of the operation of certain systems, or otherwise manifest malfunction. The vibrations affect the integrity of structures and must be predicted to prevent accelerated wear of the system by material fatigue or even its destruction when the vibrations exceed a certain threshold.
Author: Paolo Maremonti
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 312
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Book Description
Author:
Publisher: Lulu.com
ISBN: 1430318678
Category : Reference
Languages : en
Pages : 385
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Book Description
This volume presents a catalogue of over 2000 doctoral theses by Africans in all fields of mathematics, including applied mathematics, mathematics education and history of mathematics. The introduction contains information about distribution by country, institutions, period, and by gender, about mathematical density, and mobility of mathematicians. Several appendices are included (female doctorate holders, doctorates in mathematics education, doctorates awarded by African universities to non-Africans, doctoral theses by non-Africans about mathematics in Africa, activities of African mathematicians at the service of their communities). Paulus Gerdes compiled the information in his capacity of Chairman of the African Mathematical Union Commission for the History of Mathematics in Africa (AMUCHMA). The book contains a preface by Mohamed Hassan, President of the African Academy of Sciences (AAS) and Executive Director of the Academy of Sciences for the Developing World (TWAS). (383 pp.)
Author: Claude Cohen-Tannoudji
Publisher: John Wiley & Sons
ISBN: 3527345558
Category : Science
Languages : en
Pages : 790
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Book Description
This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
Author: Robert D. Blevins
Publisher:
ISBN: 9781575241845
Category : Mathematics
Languages : en
Pages : 492
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Book Description
Author: Sandip Mazumder
Publisher: Academic Press
ISBN: 0128035048
Category : Mathematics
Languages : en
Pages : 484
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Book Description
Numerical Methods for Partial Differential Equations: Finite Difference and Finite Volume Methods focuses on two popular deterministic methods for solving partial differential equations (PDEs), namely finite difference and finite volume methods. The solution of PDEs can be very challenging, depending on the type of equation, the number of independent variables, the boundary, and initial conditions, and other factors. These two methods have been traditionally used to solve problems involving fluid flow. For practical reasons, the finite element method, used more often for solving problems in solid mechanics, and covered extensively in various other texts, has been excluded. The book is intended for beginning graduate students and early career professionals, although advanced undergraduate students may find it equally useful. The material is meant to serve as a prerequisite for students who might go on to take additional courses in computational mechanics, computational fluid dynamics, or computational electromagnetics. The notations, language, and technical jargon used in the book can be easily understood by scientists and engineers who may not have had graduate-level applied mathematics or computer science courses. - Presents one of the few available resources that comprehensively describes and demonstrates the finite volume method for unstructured mesh used frequently by practicing code developers in industry - Includes step-by-step algorithms and code snippets in each chapter that enables the reader to make the transition from equations on the page to working codes - Includes 51 worked out examples that comprehensively demonstrate important mathematical steps, algorithms, and coding practices required to numerically solve PDEs, as well as how to interpret the results from both physical and mathematic perspectives
Author: Keith D. Hjelmstad
Publisher: Springer Science & Business Media
ISBN: 0387233318
Category : Technology & Engineering
Languages : en
Pages : 485
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Book Description
A solid introduction to basic continuum mechanics, emphasizing variational formulations and numeric computation. The book offers a complete discussion of numerical method techniques used in the study of structural mechanics.
Author: Krishnanand N. Kaipa
Publisher: Springer
ISBN: 3319515950
Category : Technology & Engineering
Languages : en
Pages : 265
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Book Description
This book provides a comprehensive account of the glowworm swarm optimization (GSO) algorithm, including details of the underlying ideas, theoretical foundations, algorithm development, various applications, and MATLAB programs for the basic GSO algorithm. It also discusses several research problems at different levels of sophistication that can be attempted by interested researchers. The generality of the GSO algorithm is evident in its application to diverse problems ranging from optimization to robotics. Examples include computation of multiple optima, annual crop planning, cooperative exploration, distributed search, multiple source localization, contaminant boundary mapping, wireless sensor networks, clustering, knapsack, numerical integration, solving fixed point equations, solving systems of nonlinear equations, and engineering design optimization. The book is a valuable resource for researchers as well as graduate and undergraduate students in the area of swarm intelligence and computational intelligence and working on these topics.
Author: Jamie Davies
Publisher:
ISBN: 019884154X
Category :
Languages : en
Pages : 137
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Book Description
Written primarily for mid-to-upper level undergraduates, this primer will introduce students to topics at the forefront of the subject that are being applied to probe biological problems, or to address the most pressing issues facing society. These topics will include those that form thecornerstone of contemporary research, helping students to make the transition to active researcher.This primer introduces the challenges and opportunities of applying synthetic biological techniques to mammalian cells, tissues, and organisms. It covers the special features that make engineering mammalian systems different from engineering bacteria, fungi, and plants, and provides an overview ofcurrent techniques. A variety of cutting-edge examples illustrate the different purposes of mammalian synthetic biology, including pure biomedical research, drug production, tissue engineering, and regenerative medicine.
