Download or read book Contribution num rique l homogen isation des quations de Stockes et de Navier Stockes en milieux poreux written by Olivier Gipouloux and published by . This book was released on 1992 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON ETUDIE LE REGIME MACROSCOPIQUE D'UN ECOULEMENT INCOMPRESSIBLE D'UN FLUIDE NEWTONIEN EN MILIEU POREUX PERIODIQUE A PARTIR DE SON COMPORTEMENT AU NIVEAU DU PORE. ON CONSIDERE D'ABORD QUE L'ECOULEMENT EST REGI LOCALEMENT PAR LES EQUATIONS DE STOKES. ON ETABLIT UN PARALLELE ENTRE LES THEORIES DE PRISE DE MOYENNE ET DE L'HOMOGENEISATION. ON CONSTRUIT ENSUITE UN SOLVEUR VECTORIEL DES EQUATIONS DE STOCKES ET ON HOMOGENEISE NUMERIQUEMENT DIFFERENTES SITUATIONS D'ECOULEMENT EN MILIEU POREUX. ON CONSIDERE ENFIN QUE L'ECOULEMENT EST REGI PAR LES EQUATIONS DE NAVIER-STOKES ET ON ETUDIE LE COMPORTEMENT NON LINEAIRE DE LA LOI DE DARCY EN FONCTION DU NOMBRE DE REYNOLDS

Download or read book Contribution l tude des coulements en milieux poreux written by Olivier Coulaud and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mod lisation des coulements de Stokes et Navier Stokes en milieux poreux written by Jean Barrère (auteur d'une thèse en Mécanique) and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ON ETUDIE LE PASSAGE D'ECOULEMENTS MICROSCOPIQUES A L'ECHELLE DU PORE, REGIS PAR LES EQUATIONS DE STOKES ET DE NAVIER-STOKES, AUX ECOULEMENTS MACROSCOPIQUES DANS UN MILIEU POREUX, REGIS PAR LA LOI DE DARCY. LES PRINCIPAUX POINTS D'ETUDES SONT: LE PASSAGE EN REVUE DES THEORIES DE PRISE DE MOYENNE ET L'ETABLISSEMENT DE L'EQUIVALENCE DE CELLES-CI ET LA THEORIE D'HOMOGENEISATION DANS LE CAS DE MILIEUX PERIODIQUES, LA DETERMINATION NUMERIQUE PAR UNE METHODE AUX DIFFERENCES FINIES, DE TENSEURS DE PERMEABILITE DANS DES MILIEUX PERIODIQUES ANISOTROPES TRIDIMENSIONNELS, L'ETUDE NUMERIQUE, PAR UNE METHODE AUX ELEMENTS FINIS, DES NON-LINEARITES EN REGIME DE NAVIER-STOKES DANS UN TREILLIS DE CYLINDRES. LA LOI MACROSCOPIQUE D'ECOULEMENT OBTENUE FAIT INTERVENIR UNE EXPRESSION CUBIQUE DE LA VITESSE DE FILTRATION

Download or read book Homogeneisation des equations de Stokes pour un ecoulement en milieu poreux periodique written by A. Z. Nassik and published by . This book was released on 1979 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book HOMOGENEISATION DES EQUATIONS DE STOKES POUR UN ECOULEMENT EN MILIEU POREUX PERIODIQUE written by AHMED ZAKI.. NASSIK and published by . This book was released on 1979 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON CHERCHE NUMERIQUEMENT SI LA VITESSE MICROSCOPIQUE TEND VERS UNE VITESSE MOYENNE HOMOGENEISEE. ON CONSIDERE L'HOMOGENEISATION PAR LA METHODE "RELATION AVEC LES MOYENNES" ET ON APPLIQUE LA METHODE DES ECHELLES MULTIPLES ET LA METHODE DE L'ENERGIE POUR UN PROBLEME DE STOKES HOMOGENE. ON ESSAIE DE DONNER L'EXPRESSION DU SECOND CORRECTEUR DANS LE DEVELOPPEMENT ASYMPTOTIQUE DE LA VITESSE MICROSCOPIQUE, ET ON PRESENTE LES RESULTATS NUMERIQUES EN COMPARANT LA SOLUTION EXACTE AVEC LE PREMIER CORRECTEUR DE LA SOLUTION HOMOGENEISEE

Download or read book Contribution l tude num rique des quations de Navier Stokes et des coulements bidimensionnels l int rieur d une cavit written by René Amiel and published by . This book was released on 1972 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MODELISATION PAR HOMOGENEISATION DES ECOULEMENTS EN MILIEU POREUX FISSURE written by EDUARD.. MARUSIC-PALOKA and published by . This book was released on 1995 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CETTE THESE NOUS PRESENTONS PLUSIEURS RESULTATS QUI CONCERNENT L'HOMOGENEISATION APPLIQUEE A LA MODELISATION DES MILIEUX POREUX. ELLE EST COMPOSEE DE QUATRE CHAPITRES INDEPENDANTS. DANS LES PREMIER ET DEUXIEME CHAPITRE NOUS ETUDIONS LE COMPORTEMENT EFFECTIF DES SOLUTIONS DE L'EQUATION DE LAPLACE ET DU SYSTEME DE STOKES DANS UN MILIEU POREUX, CONTENANT UNE FISSURE MINCE. SUIVANT LA RELATION ENTRE LA TAILLE CARACTERISTIQUE DES PORES ET L'EPAISSEUR DE LA FISSURE NOUS TROUVONS TROIS MODELES DIFFERENTS. LE TROISIEME CHAPITRE PRESENTE UN RESULTAT QUI CONCERNE LES ESTIMATIONS D'ERREUR POUR LES CORRECTEURS DANS L'HOMOGENEISATION DU SYSTEME DE STOKES ET DE NAVIER-STOKES, POUR UN MILIEU POREUX. DANS LE DERNIER CHAPITRE NOUS ETUDIONS LES EFFETS INERTIELS POUR UN ECOULEMENT VISQUEUX, RAPIDE DANS UNE COUCHE ONDULEE. NOUS TROUVONS UNE LOI GLOBALE NON LINEAIRE

Download or read book Contribution la r solution num rique des quations de Navier Stokes compressibles mod lisation et application written by Jean-Marc Moschetta and published by . This book was released on 2000 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimization Optimal Control and Partial Differential Equations written by V. Barbu and published by Birkhäuser. This book was released on 2013-03-07 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects research papers presented in the First Franco Romanian Conference on Optimization, Optimal Control and Partial Differential Equations held at lasi on 7-11 september 1992. The aim and the underlying idea of this conference was to take advantage of the new SOCial developments in East Europe and in particular in Romania to stimulate the scientific contacts and cooperation between French and Romanian mathematicians and teams working in the field of optimization and partial differential equations. This volume covers a large spectrum of problems and result developments in this field in which most of the participants have brought notable contributions. The following topics are discussed in the contributions presented in this volume. 1 -Variational methods in mechanics and physical models Here we mention the contributions of D. Cioranescu. P. Donato and H.I. Ene (fluid flows in dielectric porous media). R. Stavre (the impact of a jet with two fluids on a porous wall). C. Lefter and D. Motreanu (nonlinear eigenvalue problems with discontinuities). I. Rus (maximum principles for elliptic systems). and on asymptotic XII properties of solutions of evolution equations (R Latcu and M. Megan. R Luca and R Morozanu. R Faure). 2 -The controllabillty of Inflnlte dimensional and distributed parameter systems with the contribution of P. Grisvard (singularities and exact controllability for hyperbolic systems). G. Geymonat. P. Loreti and V. Valente (exact controllability of a shallow shell model). C.

Download or read book Contribution la r solution des quations de Navier Stokes par une m thode de r analyse written by Patrice Maminirina Rabearivelo and published by . This book was released on 2005 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Notre travail est centré sur le problème de la modélisation numérique des équations non linéaires de Navier Stokes. Partant d'une discrétisation des équations par une approche éléments finis, nous développons une fornrnlation version réanalyse de la méthode. Elle permet la prise en compte de variations de conditions aux limites sans avoir à reconstruire l'ensemble du système linéaire associé. Deux méthodes sont alors proposées, l'une correspond au régime stationnaire tandis que l'autre traite les écoulements non permanents. Pour la validation de nos études, nous avons développé un code de calcul traitant le "window problem ". Nous y avons utilisé plusieurs configurations correspondant à des conditions aux limjtes différentes et nous avons observés des gains dc calculs appréciables par rapport aux codes de calcul professionnels.

Download or read book European Journal of Mechanics written by and published by . This book was released on 1994 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Homog n isation des quations de Stokes et de Navier Stokes written by Grégoire Allaire and published by . This book was released on 1989 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON ETUDIE L'HOMOGENEISATION DES EQUATIONS DE STOKES ET NAVIER-STOKES AVEC UNE CONDITION AUX LIMITES DE DIRICHLET DANS UN DOMAINE CONTENANT DE PETITS OBSTACLES, QUI SONT D'ABORD SUPPOSES REPARTIS AUX NUDS D'UN RESEAU REGULIER PERIODIQUE. ON DEMONTRE LA CONVERGENCE DU PROCEDE D'HOMOGENEISATION LORSQUE LE PAS DU RESEAU TEND VERS ZERO. ON ETUDIE LE PROBLEME HOMOGENEISE SUIVANT LA TAILLE DES OBSTACLES.

Download or read book An Introduction to Homogenization written by Doïna Cioranescu and published by Oxford University Press on Demand. This book was released on 1999 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials are widely used in industry: well-known examples of this are the superconducting multi-filamentary composites which are used in the composition of optical fibres. Such materials are complicated to model, as different points in the material will have different properties. The mathematical theory of homogenization is designed to deal with this problem, and hence is used to model the behaviour of these important materials. This book provides a self-contained and authoritative introduction to the subject for graduates and researchers in the field.

Download or read book Heat Transfer in Polymer Composite Materials written by Nicolas Boyard and published by John Wiley & Sons. This book was released on 2016-03-28 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses general information, good practices and examples about thermo-physical properties, thermo-kinetic and thermo-mechanical couplings, instrumentation in thermal science, thermal optimization and infrared radiation.

Download or read book Optimization Optimal Control and Partial Differential Equations written by Viorel Barbu and published by Springer Science & Business Media. This book was released on 1992 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Variational methods in mechanics and physical models.- Fluid flows in dielectric porous media.- The impact of a jet with two fluids on a porous wall.- Critical point methods in nonlinear eigenvalue problems with discontinuities.- Maximum principles for elliptic systems.- Exponential dichotomy of evolution operators in Banach spaces.- Asymptotic properties of solutions to evolution equations.- On some nonlinear elastic waves biperiodical or almost periodical in mechanics and extensions hyperbolic nonlinear partial differential equations.- The controllability of infinite dimensional and distributed parameter systems.- Singularities in boundary value problems and exact controllability of hyperbolic systems.- Exact controllability of a shallow shell model.- Inverse problem: Identification of a melting front in the 2D case.- Micro-local approach to the control for the plates equation.- Bounded solutions for controlled hyperbolic systems.- Controllability and turbulence.- The H? control problem.- The H? boundary control with state feedback; the hyperbolic case.- Remarks on the theory of robust control.- The dynamic programming method.- Optimality and characteristics of Hamilton-Jacobi-Bellman equations.- Verification theorems of dynamic programming type in optimal control.- Isaacs' equations for value-functions of differential games.- Optimal control for robot manipulators.- Control theory and environmental problems: Slow fast models for management of renewable ressources.- On the Riccati equations of stochastic control.- Optimal control of nonlinear partial differential equations.- A boundary Pontryagin's principle for the optimal control of state-constrained elliptic systems.- Controllability properties for elliptic systems, the fictitious domain method and optimal shape design problems.- Optimal control for elliptic equation and applications.- Inverse problems for variational inequalities.- The variation of the drag with respect to the domain in Navier-Stokes flow, .- Mathematical programming and nonsmooth optimization.- Scalar minimax properties in vectorial optimization.- Least-norm regularization for weak two-level optimization problems.- Continuity of the value function with respect to the set of constraints.- On integral inequalities involving logconcave functions.- Numerical solution of free boundary problems in solids mechanics.- Authors' index

Download or read book African Doctorates in Mathematics written by and published by Lulu.com. This book was released on 2007 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.)

Download or read book Non Homogeneous Media and Vibration Theory written by Enrique Sanchez-Palencia and published by . This book was released on 2014-01-15 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: