Download or read book M thodes spectrales et de d composition de domaine pour les coulements complexes confin s en rotation written by Isabelle Raspo and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: DES PHENOMENES DE DYNAMIQUE DES FLUIDES COMPLEXE ET D'INSTABILITES SE PRODUISANT DANS DES CONFIGURATIONS CANAL-CAVITE EN ROTATION ET SOUMISES A UN FLUX FORCE AXIAL SONT ETUDIES PAR VOIE NUMERIQUE AU MOYEN D'APPROXIMATIONS SPECTRALES. UNE METHODE DE DECOMPOSITION DE DOMAINE DIRECTE EST DEVELOPPEE POUR L'ETUDE DES REGIMES D'ECOULEMENT AXISYMETRIQUES. CETTE METHODE EST UTILISEE POUR SIMULER DES PHENOMENES D'ECLATEMENT TOURBILLONNAIRE ET D'INSTABILITES SEMBLABLES A CEUX MIS EN EVIDENCE PAR L'EXPERIENCE. ELLE EST EGALEMENT ETUDIEE DE FACON APPROFONDIE ET APPLIQUEE AVEC SUCCES A UN PROBLEME DE DYNAMIQUE DES FLUIDES COMPLEXE PRESENTANT UNE SOLUTION SINGULIERE ET DONT L'APPROXIMATION MONODOMAINE EST POLLUEE PAR D'IMPORTANTES OSCILLATIONS DE GIBBS. UNE SECONDE METHODE NUMERIQUE FONDEE SUR UN ALGORITHME DE PROJECTION, EST DEVELOPPEE POUR L'ETUDE DES REGIMES D'ECOULEMENT TRIDIMENSIONNELS. APRES AVOIR ETE VALIDEE SUR LE PROBLEME DE LA CAVITE EN ROTATION DIFFERENTIELLEMENT CHAUFFEE, CETTE METHODE EST APPLIQUEE A LA SIMULATION, EN CONFIGURATION MONODOMAINE, DE TOURBILLONS DE TAYLOR APPARAISSANT DANS UNE CONDUITE ANNULAIRE EN ROTATION DIFFERENTIELLE ET EN PRESENCE D'UN FLUX FORCE AXIAL
Download or read book METHODES SPECTRALES EN DOMAINES NON RECTANGULAIRES APPLICATION AU CALCUL D ECOULEMENTS A SURFACE LIBRE written by ABDOU.. GARBA and published by . This book was released on 1993 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA PRESENTE ETUDE CONCERNE L'EMPLOI DES METHODES SPECTRALES POUR LA RESOLUTION NUMERIQUE DE PROBLEMES DANS DES GEOMETRIES COMPLEXES. LA PREMIERE PARTIE EST CONSACREE A L'ETUDE DE TECHNIQUES PERMETTANT D'APPLIQUER EFFICACEMENT LES METHODES SPECTRALES DANS DES GEOMETRIES COMPLEXES. LA PREMIERE TECHNIQUE REPOSE SUR UNE TRANSFORMATION DE COORDONNEE POUR SE RAMENER A UN RECTANGLE, LA SECONDE EST CELLE DITE DE PLONGEMENT QUI FAIT APPEL A LA METHODE DE LA MATRICE D'INFLUENCE. LA DEUXIEME PARTIE CONCERNE LE DEVELOPPEMENT D'UNE METHODE NUMERIQUE DE CALCUL DES ECOULEMENTS INSTATIONNAIRES BIDIMENSIONNELS A SURFACE LIBRE D'UN FLUIDE VISQUEUX INCOMPRESSIBLE AVEC PERIODICITE DANS LA DIRECTION HORIZONTALE. LES EQUATIONS SONT CONSIDEREES DANS LA FORMULATION FONCTION DE COURANT-TOURBILLON. UN CHANGEMENT DE VARIABLE BASE SUR LA HAUTEUR DE LA SURFACE LIBRE PERMET D'EFFECTUER LES CALCULS DANS UN DOMAINE FIXE. DEUX TYPES DE SCHEMAS DU SECOND ORDRE EN TEMPS ONT ETE CONSIDERES. LE PREMIER SCHEMA EST SEMI-IMPLICITE ET CONDUIT A UNE RESOLUTION DIRECTE, LE SECOND EST COMPLETEMENT IMPLICITE ET NECESSITE, DE CE FAIT, UNE RESOLUTION ITERATIVE. LA RESOLUTION EN ESPACE, LE TYPE SPECTRAL FOURIER-TCHEBYCHEV, UTILISE LA TECHNIQUE DE MATRICE D'INFLUENCE POUR LA VERIFICATION DES CONDITIONS AUX BORDS ET DE SURFACE LIBRE. CES DEUX SCHEMAS ONT ETE EPROUVES SUR DIVERS EXEMPLES: SOLUTION ANALYTIQUE, AMORTISSEMENT D'UNE VAGUE ET INJECTION-EXTRUSION
Download or read book DEVELOPPEMENT DE METHODES SPECTRALES POUR FLUIDES COMPRESSIBLES ET PARALLELISATION PAR DECOMPOSITION DE DOMAINE APPLICATION AU TRANSPORT PHYSIQUE EN PHASE VAPEUR written by Olivier Louchart and published by . This book was released on 1997 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE MEMOIRE CONCERNE L'ETUDE, PAR VOIE NUMERIQUE, DE L'HYDRODYNAMIQUE COMPLEXE LORS D'UN PROCESSUS DE CRISTALLOGENESE DE TYPE PVT (PHYSICAL VAPOUR TRANSPORT) BASE SUR LE TRANSPORT D'UN MATERIAU, EN PHASE VAPEUR, POUR LA REALISATION DE FILMS CRISTALLINS TRES PURS. AU-DELA DU PROCEDE PVT, C'EST TOUT LE PROBLEME DE LA CONNAISSANCE DE LA CONVECTION DANS LES MELANGES DE FLUIDES COMPRESSIBLES QUI APPARAIT. LE TRAVAIL COMPORTE LE DEVELOPPEMENT DE DEUX CODES DE CALCUL DE TRES HAUTE PRECISION BASES SUR LES METHODES SPECTRALES COLLOCATION-CHEBYSHEV. LE PREMIER CODE RESOUT LES EQUATIONS NON-STATIONNAIRES, COMPRESSIBLES A FAIBLE NOMBRE DE MACH, DE NAVIER-STOKES, D'ENERGIE ET D'ESPECES. LA NECESSITE DE L'APPROCHE COMPRESSIBLE PAR RAPPORT A L'APPROXIMATION DE BOUSSINESQ A ETE MISE EN EVIDENCE DANS DES MELANGES DE FLUIDES COMPRESSIBLES POUR DES SITUATIONS PROCHES DES CONDITIONS PVT REELLES, OU LA VARIATION DE LA DENSITE EST TROP IMPORTANTE. LE SECOND CODE MET EN UVRE UN ALGORITHME DE DECOMPOSITION DE DOMAINE SANS RECOUVREMENT, ASSOCIE A UN ALGORITHME DE PROJECTION. IL PERMET A LA FOIS UNE EXTENSION DES METHODES SPECTRALES AUX GEOMETRIES COMPLEXES ET UNE RESOLUTION EFFICACE SUR CALCULATEURS PARALLELES. CE CODE A ETE TESTE ET VALIDE SUR DES PROBLEMES NON-STATIONNAIRES DE CONVECTION POUR FLUIDES DE BOUSSINESQ. CES DEUX CODES POURRAIENT ETRE FUSIONNES EN VUE D'UNE ETUDE APPROFONDIE DES PROBLEMES DE CROISSANCE CRISTALLINE EN GEOMETRIE COMPLEXE.
Download or read book Calcul d coulements compressibles par m thodes spectrales avec ajustement du choc written by Jean Claudel and published by . This book was released on 1991 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON S'INTERESSE AU DEVELOPPEMENT DE METHODES NUMERIQUES APPLIQUEES A LA SIMULATION D'ECOULEMENTS SUR LES AVANT-CORPS EN REGIME SUPERSONIQUE, INCLUANT DONC LA PRESENCE D'UN CHOC. EN RAISON DE LEUR PRECISION, DES METHODES SPECTRALES SONT UTILISEES POUR DISCRETISER LA SOLUTION EN ESPACE. AFIN D'EXPLOITER AU MIEUX LES AVANTAGES DE CE TYPE DE METHODES, ON TRAVAILLE DANS UN DOMAINE OU LES INCONNUES SE COMPORTENT DE MANIERE REGULIERE. A CET EFFET, LA SURFACE DE CHOC EST PRISE EN COMPTE PAR UNE METHODE D'AJUSTEMENT DU CHOC, GRACE A LAQUELLE LE CHOC EST CONSIDERE COMME UNE FRONTIERE DU DOPMAINE DE CALCUL; ON S'EST DE PLUS BORNES A L'ETUDE DE CORPS REGULIERS (ELLIPSES) PERMETTANT L'OBTENTION D'UN MAILLAGE REGULIER. LES PROBLEMES TRAITES ADMETTENT UN ETAT STATIONNAIE UNIQUE, OBTENU COMME LA LIMITE, POUR UN TEMPS TENDANT VERS L'INFINI, D'UN SYSTEME TRAITE DE MANIERE INSTATIONNAIRE. LE BUT N'EST PAS ICI DE DECRIRE FIDELEMENT L'HISTORIQUE DE LA CONVERGENCE DE LA SOLUTION, MAIS D'ACCELERER LA RECHERCHE DE LA STATIONNARITE. ON INTRODUIT UN SCHEMA IMPLICITE COMPORTANT UNE PHASE DE STABILISATION EN DIFFERENCES FINIES QUI CONSERVE LA PRECISION SPECTRALE, TOUT EN PERMETTANT DE S'AFFRANCHIR DES CONTRAINTES DE TEMPS D'EXECUTION INFORMATIQUE INHERENTES AUX METHODES SPECTRALES POUR CETTE CLASSE DE PROBLEMES. AFIN D'EN DEFINIR LES LIMITES D'UTILISATION, CE SCHEMA EST TESTE SUR PLUSIEURS EXEMPLES TEST MONODIMENSIONNELS. IL EST ENSUITE APPLIQUE A LA RESOLUTION D'ECOULEMENTS BIDIMENSIONNELS NON VISQUEUX (EQUATIONS D'EULER) OU VISQUEUX (EQUATIONS DE NAVIER-STOKES) OU L'ON MET EN EVIDENCE SON INTERET ET SES IFFICULTES DE MISE EN UVRE
Download or read book Multivariate Geostatistics written by Hans Wackernagel and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to geostatistics stressing the multivariate aspects for scientists, engineers and statisticians. The book presents a brief review of statistical concepts, a detailed introduction to linear geostatistics, and an account of three basic methods of multivariate analysis. Applications from very different areas of science, as well as exercises with solutions, are provided to help convey the general ideas. In this second edition, the chapters regarding normal kriging and cokriging have been restructured and the section on non-stationary geostatistics has been entirely rewritten.
Download or read book Abnormal Pressures While Drilling written by Awdesh Tiwari and published by . This book was released on 2015-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book studies the mechanisms and causes of abnormal pressure distribution while drilling.
Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by John Wiley & Sons. This book was released on 2009-07-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Download or read book Computational Aerodynamics written by Antony Jameson and published by Cambridge University Press. This book was released on 2022-09 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn the design and analysis of numerical algorithms for aerodynamics. Ideal for graduates, researchers, and professionals in the field.
Download or read book Rock Foundations written by United States. Army. Corps of Engineers and published by . This book was released on 1994 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Geotechnical Design Codes of Practice written by Patrick Arnold and published by IOS Press. This book was released on 2013 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ground is one of the most highly variable of engineering materials. It is therefore not surprising that geotechnical designs depend on local site conditions and local engineering experience. Engineering practices, relating to investigation and design methods site understanding and to safety levels acceptable to society, will therefore vary between different regions.The challenge in geotechnical engineering is to make use of worldwide geotechnical experience, established over many years, to aid in the development and harmonization of geotechnical design codes. Given the significant uncertainties involved, empiricism and engineering
Download or read book AGARD Conference Proceedings written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plants of Desert Dunes written by Avinoam Danin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on three decades of field experience in southwest Asia, southern Africa, and the southwest United States, the author summarizes the major adaptations of plants to desert dunes. This integrative study of plant and diaspore morphology, reactive growth, life cycles, and environmental factors explains and predicts plant distribution. Many kinds of dune syndromes, plant case studies and vegetation transects are discussed and illustrated to clarify the significance of adaptations to specific habitat factors. Although the focus is on vascular plants, the development of microbiotic soil crust, its function, and its composition are discussed as well.
Download or read book Special Course on Aircraft Dynamics at High Angles of Attack Experiments and Modelling written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. Special Course and published by . This book was released on 1991 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report consists of lecture notes of an AGARD Fluid Dynamics Panel Special Course. These notes provide the latest information on the development and use of dynamic experiments in wind tunnels from several of the NATO nations. They address current oscillatory and rotary test techniques, experimental results for typical configurations, and the use of these data for flight mechanics applications. Subject included are: dynamic lift, wing rock, fluid dynamics of rotary flows, mathematical modelling, non-linear data representation, vortex manipulation for control enhancement, and correlations of predictions based on rotary and oscillatory wind-tunnel and flight-test results. The complete course notes are contained in two volumes. The main part of the notes is contained in AGARD Advisory Report 265 (ADA235179). The present volume includes papers on: Unsteady aerodynamics of slender wings; Dynamic stall effects and applications to high performance aircraft; Oscillatory test techniques; Large amplitude oscillations; Oscillatory data for typical configurations; and Forebody vortex control."--Stinet.
Download or read book Geology Geomorphology written by David Ambrose and published by . This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engine Airframe Integration written by and published by . This book was released on 1992 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerodynamics and aeroacoustics of rotorcraft written by and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
