Estimation et analyse de champs denses de vitesses d'écoulements fluides
Author: Thomas Corpetti
Publisher:
Published: 2002
Total Pages: 0
ISBN-13:
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Author: Thomas Corpetti
Publisher:
Published: 2002
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKAuthor: Anne Cuzol
Publisher:
Published: 2006
Total Pages: 148
ISBN-13:
DOWNLOAD EBOOKCette thèse traite de l'analyse d'écoulements fluides à partir de séquences d'images et en particulier du problème de l'estimation cohérente de champs de vitesses. Dans une première partie nous proposons un estimateur paramétrique de mouvement fournissant une représentation de faible dimension du champ de déplacements. La deuxième partie traite du suivi temporel des champs denses de vitesses, formulé comme un problème de filtrage stochastique non linéaire. Le filtre que nous proposons combine un processus de diffusion issu d'une formulation stochastique de l'équation de Navier-Stokes sous sa forme vorticité-vitesse, et des observations discrètes extraites de la séquence d'images. Le filtrage particulaire formulé dans un cadre continu permet de résoudre le problème de filtrage non linéaire associé. Nous présentons des résultats d'estimation et de suivi sur des séquences synthétiques et des exemples réels issus de la météorologie et de la mécanique des fluides expérimentale.
Author: Alain Boutier
Publisher: John Wiley & Sons
Published: 2012-10-22
Total Pages: 436
ISBN-13: 1848213972
DOWNLOAD EBOOKIn fluid mechanics, velocity measurement is fundamental in order to improve the behavior knowledge of the flow. Velocity maps help us to understand the mean flow structure and its fluctuations, in order to further validate codes. Laser velocimetry is an optical technique for velocity measurements; it is based on light scattering by tiny particles assumed to follow the flow, which allows the local fluid flow velocity and its fluctuations to be determined. It is a widely used non-intrusive technique to measure velocities in fluid flows, either locally or in a map. This book presents the various techniques of laser velocimetry, as well as their specific qualities: local measurements or in plane maps, mean or instantaneous values, 3D measurements. Flow seeding with particles is described with currently used products, as well as the appropriate aerosol generators. Post-processing of data allows us to extract synthetic information from measurements and to perform comparisons with results issued from CFD codes. The principles and characteristics of the different available techniques, all based on the scattering of light by tiny particles embedded in the flow, are described in detail; showing how they deliver different information, either locally or in a map, mean values and turbulence characteristics.
Author: Pierre Liardet
Publisher: Springer Science & Business Media
Published: 2004-04-08
Total Pages: 398
ISBN-13: 3540215239
DOWNLOAD EBOOKThis book constitutes the thoroughly refereed post-proceedings of the 6th International Conference on Artificial Evolution, EA 2003, held in Marseilles, France in October 2003. The 32 revised full papers presented were carefully selected and improved during two rounds of reviewing and revision. The papers are organized in topical sections on theoretical issues, algorithmic issues, applications, implementation issues, genetic programming, coevolution and agent systems, artificial life, and cellular automata.
Author: Fabien Anselmet
Publisher: John Wiley & Sons
Published: 2016-01-07
Total Pages: 529
ISBN-13: 1119178398
DOWNLOAD EBOOKThis didactic book presents the main elements of acoustics, aeroacoustics and vibrations. Illustrated with numerous concrete examples linked to solid and fluid continua, Acoustics, Aeroacoustics and Vibrations proposes a selection of applications encountered in the three fields, whether in room acoustics, transport, energy production systems or environmental problems. Theoretical approaches enable us to analyze the different processes in play. Typical results, mostly from numerical simulations, are used to illustrate the main phenomena (fluid acoustics, radiation, diffraction, vibroacoustics, etc.).
Author: Hermann Schlichting (Deceased)
Publisher: Springer
Published: 2016-10-04
Total Pages: 814
ISBN-13: 366252919X
DOWNLOAD EBOOKThis new edition of the near-legendary textbook by Schlichting and revised by Gersten presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with particular emphasis on the flow past bodies (e.g. aircraft aerodynamics). The new edition features an updated reference list and over 100 additional changes throughout the book, reflecting the latest advances on the subject.
Author: Philippe Gourbesville
Publisher: Springer
Published: 2015-08-21
Total Pages: 616
ISBN-13: 9812876154
DOWNLOAD EBOOKThis book is a collection of extended papers based on presentations given during the SIMHYDRO 2014 conference, held in Sophia Antipolis in June 2014. It focuses on the modeling and simulation of fast hydraulic transients, on 3D modeling, and on uncertainties and multiphase flows. The book explores both the limitations and performance of current models and presents the latest developments based on new numerical schemes, high-performance computing, multiphysics and multiscale methods, and better interaction with field or scale model data. It addresses the interests of practitioners, stakeholders, researchers and engineers active in this field.
Author: Theodore Theodorsen
Publisher:
Published: 1944
Total Pages: 184
ISBN-13:
DOWNLOAD EBOOKSummary: A technical method is given for calculating the axial interference velocity of a propeller. The method involves the use of certain weight functions P, Q, and F. Numerical values for the weight functions are given for two-blade, three-blade, and six-blade propellers.
Author: Trong T. Bui
Publisher:
Published: 1998
Total Pages: 28
ISBN-13:
DOWNLOAD EBOOKAuthor: Cameron Tropea
Publisher: Springer Science & Business Media
Published: 2007-10-09
Total Pages: 1570
ISBN-13: 3540251413
DOWNLOAD EBOOKAccompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--Page 3 of cover.