DECOMPOSITION DE DOMAINE ET PARTITION DE MAILLAGE POUR LE CALCUL D'ECOULEMENTS COMPRESSIBLES A L'AIDE DE SCHEMAS IMPLICITES

DECOMPOSITION DE DOMAINE ET PARTITION DE MAILLAGE POUR LE CALCUL D'ECOULEMENTS COMPRESSIBLES A L'AIDE DE SCHEMAS IMPLICITES PDF Author: GUY.. DE SPIEGELEER
Publisher:
ISBN:
Category :
Languages : fr
Pages : 154

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Book Description
L'INFLUENCE DES CONDITIONS DE RACCORD SUR LE COMPORTEMENT DES SCHEMAS IMPLICITES EST BIEN SOUVENT SOUS-ESTIMEE. AFIN DE MIEUX CERNER LES NOMBREUX MECANISMES IMPLIQUES, NOUS APPROFONDISSONS L'ETUDE DE QUELQUES CAS PARTICULIERS REPRESENTATIFS D'UNE LARGE GAMME DES DIFFICULTES RENCONTREES. LA PREMIERE PARTIE DE CE MEMOIRE EST CONSACREE AU TRAITEMENT MULTIDOMAINE ENTRE DEUX SOUS-DOMAINES SANS RECOUVREMENT. PARTANT DU FORMALISME DES CONDITIONS DE RACCORD IMPLICITES LINEAIREMENT EQUIVALENTES, NOUS ETENDONS LA METHODE D'ANALYSE DES ERREURS DE SKOLLERMO ET LA THEORIE DE LA STABILITE DE GUSTAFSSON, KREISS ET SUNDSTROM A L'ETUDE DE CONDITIONS DE RACCORD IMPLICITES NON TRANSLATOIRES EN TEMPS. DIFFERENTES TECHNIQUES DE DECOMPOSITION DE DOMAINE SONT VALIDEES PAR LE CALCUL D'ECOULEMENTS STATIONNAIRES ET INSTATIONNAIRES DANS DES GEOMETRIES DE TURBOMACHINES. LA SECONDE PARTIE TRAITE DE LA PARALLELISATION D'UN OPERATEUR IMPLICITE FACTORISE OU RELAXE. NOUS PRESENTONS UN ALGORITHME ORIGINAL DE RESOLUTION D'UN SYSTEME TRIDIAGONAL. IL RESTE PARFAITEMENT PARALLELISABLE QUEL QUE SOIT LE NOMBRE DE PROCESSEURS DISPONIBLES, AU PRIX D'UN INFIME DECALAGE PAR RAPPORT A LA SOLUTION MONODOMAINE EQUIVALENTE. DES ETUDES THEORIQUES DE STABILITE ET D'EFFICACITE CONDUISENT A DIVERS RESULTATS ORIGINAUX CONCERNANT LES SCHEMAS IMPLICITES MULTIBLOCS. ON MONTRE, EN PARTICULIER, QUE L'ECRITURE APPROXIMATIVE DES CONDITIONS DE RACCORD IMPLICITES PEUT ENTRAINER L'APPARITION D'INSTABILITES NUMERIQUES. LE NOUVEL ALGORITHME ET LES RESULTATS THEORIQUES SONT VALIDES PAR LE CALCUL D'ECOULEMENTS DE FLUIDES PARFAITS, VISQUEUX, LAMINAIRES ET TURBULENTS, SUBSONIQUES ET TRANSSONIQUES, STATIONNAIRES ET INSTATIONNAIRES A L'AIDE D'UN SCHEMA IMPLICITE PARALLELISE PAR BLOC

DECOMPOSITION DE DOMAINE ET PARTITION DE MAILLAGE POUR LE CALCUL D'ECOULEMENTS COMPRESSIBLES A L'AIDE DE SCHEMAS IMPLICITES

DECOMPOSITION DE DOMAINE ET PARTITION DE MAILLAGE POUR LE CALCUL D'ECOULEMENTS COMPRESSIBLES A L'AIDE DE SCHEMAS IMPLICITES PDF Author: GUY.. DE SPIEGELEER
Publisher:
ISBN:
Category :
Languages : fr
Pages : 154

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Book Description
L'INFLUENCE DES CONDITIONS DE RACCORD SUR LE COMPORTEMENT DES SCHEMAS IMPLICITES EST BIEN SOUVENT SOUS-ESTIMEE. AFIN DE MIEUX CERNER LES NOMBREUX MECANISMES IMPLIQUES, NOUS APPROFONDISSONS L'ETUDE DE QUELQUES CAS PARTICULIERS REPRESENTATIFS D'UNE LARGE GAMME DES DIFFICULTES RENCONTREES. LA PREMIERE PARTIE DE CE MEMOIRE EST CONSACREE AU TRAITEMENT MULTIDOMAINE ENTRE DEUX SOUS-DOMAINES SANS RECOUVREMENT. PARTANT DU FORMALISME DES CONDITIONS DE RACCORD IMPLICITES LINEAIREMENT EQUIVALENTES, NOUS ETENDONS LA METHODE D'ANALYSE DES ERREURS DE SKOLLERMO ET LA THEORIE DE LA STABILITE DE GUSTAFSSON, KREISS ET SUNDSTROM A L'ETUDE DE CONDITIONS DE RACCORD IMPLICITES NON TRANSLATOIRES EN TEMPS. DIFFERENTES TECHNIQUES DE DECOMPOSITION DE DOMAINE SONT VALIDEES PAR LE CALCUL D'ECOULEMENTS STATIONNAIRES ET INSTATIONNAIRES DANS DES GEOMETRIES DE TURBOMACHINES. LA SECONDE PARTIE TRAITE DE LA PARALLELISATION D'UN OPERATEUR IMPLICITE FACTORISE OU RELAXE. NOUS PRESENTONS UN ALGORITHME ORIGINAL DE RESOLUTION D'UN SYSTEME TRIDIAGONAL. IL RESTE PARFAITEMENT PARALLELISABLE QUEL QUE SOIT LE NOMBRE DE PROCESSEURS DISPONIBLES, AU PRIX D'UN INFIME DECALAGE PAR RAPPORT A LA SOLUTION MONODOMAINE EQUIVALENTE. DES ETUDES THEORIQUES DE STABILITE ET D'EFFICACITE CONDUISENT A DIVERS RESULTATS ORIGINAUX CONCERNANT LES SCHEMAS IMPLICITES MULTIBLOCS. ON MONTRE, EN PARTICULIER, QUE L'ECRITURE APPROXIMATIVE DES CONDITIONS DE RACCORD IMPLICITES PEUT ENTRAINER L'APPARITION D'INSTABILITES NUMERIQUES. LE NOUVEL ALGORITHME ET LES RESULTATS THEORIQUES SONT VALIDES PAR LE CALCUL D'ECOULEMENTS DE FLUIDES PARFAITS, VISQUEUX, LAMINAIRES ET TURBULENTS, SUBSONIQUES ET TRANSSONIQUES, STATIONNAIRES ET INSTATIONNAIRES A L'AIDE D'UN SCHEMA IMPLICITE PARALLELISE PAR BLOC

The Theory of Ionization of Gases by Collision

The Theory of Ionization of Gases by Collision PDF Author: Sir John Townsend
Publisher:
ISBN:
Category : Electric conductivity
Languages : en
Pages : 112

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Satellite Situation Report

Satellite Situation Report PDF Author: Goddard Space Flight Center. Office of Public Affairs
Publisher:
ISBN:
Category : Artificial satellites
Languages : en
Pages : 366

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Vortex Dominated Flows

Vortex Dominated Flows PDF Author: Denis L. Blackmore
Publisher: World Scientific
ISBN: 9812563202
Category : Science
Languages : en
Pages : 299

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Book Description
Honoring the contributions of one of the field's leading experts, Lu Ting, this indispensable volume contains important new results at the cutting edge of research. A wide variety of significant new analytical and numerical results in critical areas are presented, including point vortex dynamics, superconductor vortices, cavity flows, vortex breakdown, shock/vortex interaction, wake flows, magneto-hydrodynamics, rotary wake flows, and hypersonic vortex phenomena.The book will be invaluable for those interested in the state of the art of vortex dominated flows, both from a theoretical and applied perspective.Professor Lu Ting and Joe Keller have worked together for over 40 years. In their first joint work entitled ?Periodic vibrations of systems governed by nonlinear partial differential equations?, perturbation analysis and bifurcation theory were used to determine the frequencies and modes of vibration of various physical systems. The novelty was the application to partial differential equations of methods which, previously, had been used almost exclusively on ordinary differential equations. Professsor Lu Ting is an expert in both fluid dynamics and the use of matched asymptotic expansions. His physical insight into fluid flows has led the way to finding the appropriate mathematical simplications used in the solutions to many difficult flow problems.

Space Debris

Space Debris PDF Author: Heiner Klinkrad
Publisher: Springer Science & Business Media
ISBN: 3540376747
Category : Technology & Engineering
Languages : en
Pages : 438

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Book Description
The future evolution of the debris environment will be forecast on the basis of traffic models and possible hazard mitigation practices. The text shows how large trackable objects will have re-entry pinpointed and predictions made on related risk assessment for possible ground impact. Models will also be described for meteoroids which are also a prevailing risk.

Instabilities in Multiphase Flows

Instabilities in Multiphase Flows PDF Author: A. Berlemont
Publisher:
ISBN: 9781489915955
Category :
Languages : en
Pages : 356

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Parallel Computing

Parallel Computing PDF Author: Barbara Chapman
Publisher: IOS Press
ISBN: 1607505290
Category : Computers
Languages : en
Pages : 760

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Book Description
From Multicores and GPUs to Petascale. Parallel computing technologies have brought dramatic changes to mainstream computing the majority of todays PCs, laptops and even notebooks incorporate multiprocessor chips with up to four processors. Standard components are increasingly combined with GPUs Graphics Processing Unit, originally designed for high-speed graphics processing, and FPGAs Free Programmable Gate Array to build parallel computers with a wide spectrum of high-speed processing functions. The scale of this powerful hardware is limited only by factors such as energy consumption and thermal control. However, in addition to"

Modelling Fluid Flow

Modelling Fluid Flow PDF Author: János Vad
Publisher: Springer Science & Business Media
ISBN: 3662087979
Category : Technology & Engineering
Languages : en
Pages : 424

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Book Description
Modelling Fluid Flow presents invited lectures, workshop summaries and a selection of papers from a recent international conference CMFF '03 on fluid technology. The lectures follow the current evolution and the newest challenges of the computational methods and measuring techniques related to fluid flow. The workshop summaries reflect the recent trends, open questions and unsolved problems in the mutually inspiring fields of experimental and computational fluid mechanics. The papers cover a wide range of fluids engineering, including reactive flow, chemical and process engineering, environmental fluid dynamics, turbulence modelling, numerical methods, and fluid machinery.

Parallel Computational Fluid Dynamics

Parallel Computational Fluid Dynamics PDF Author: Kenli Li
Publisher: Springer
ISBN: 3642539629
Category : Computers
Languages : en
Pages : 626

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Book Description
This book constitutes the refereed proceedings of the 25th International Conference on Parallel Computational Fluid Dynamics, ParCFD 2013, held in Changsha, China, in May 2013. The 35 revised full papers presented were carefully reviewed and selected from more than 240 submissions. The papers address issues such as parallel algorithms, developments in software tools and environments, unstructured adaptive mesh applications, industrial applications, atmospheric and oceanic global simulation, interdisciplinary applications and evaluation of computer architectures and software environments.