Third-order finite element schemes for the solution of hyperbolic problems

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Finite element solution of hyperbolic equations II. Two dimensional case

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Numerical simulation of 3-D flows with a finite element method

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Finite element solution of hyperbolic equations I.One-dimensional case

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Virtual Environments for multiphysics code validation on Computing Grids

We advocate in this paper the use of grid-based infrastructures that are designed for seamless approaches to the numerical expert users, i.e., the multiphysics applications designers. It relies on sophisticated computing environments based on computing grids, connecting heterogeneous computing resources: mainframes, PC-clusters and workstations running multiphysics codes and utility software, e.g., visualization tools. The approach is based on concepts defined by the HEAVEN* consortium. HEAVEN is a European scientific consortium including industrial partners from the aerospace, telecommunication and software industries, as well as academic research institutes. Currently, the HEAVEN consortium works on a project that aims to create advanced services platforms. It is intended to enable "virtual private grids" supporting various environments for users manipulating a suitable high-level interface. This will become the basis for future generalized services allowing the integration of various services without the need to deploy specific grid infrastructures

Collaborative Multidisciplinary Design in Virtual Environments

International audienceThe application designers can usually define their own “virtual environments” by selecting the appropriate computing resources required, or reuse and compose existing environments. The approach is generic by allowing various application domains to benefit from potential hardware and software resources located on remote computing facilities in a simple and intuitive way. The computing resources are defined by services made available as sets of standardized interfaces performing specific tasks: application workflow, input data streams, output visualization tools, monitoring facilities, etc. Services can be composed and hierarchically defined. Transparent access to heterogeneous hardware and software operating systems is guaranteed. An aeroelasticity example in airliner design is given

Simulation numérique d'écoulements compressibles 3-D par un schéma décentré en maillage non structuré

Nous présentons dans ce rapport une méthode de résolution numérique d'écoulements compressibles régis par les équations d'Euler à trois dimensions d'espace. L'approche utilisée est une formulation mixte Eléments Finis / Volumes Finis de type MUSCL s'appliquant à des maillages tétraédriques. Les flux sont calculés par décentrage et l'intégration en temps est réalisée à l'aide d'un schéma à deux pas de type prédicteur-correcteur. On présente quelques comparaisons numériques avec des résultats obtenus par une méthode de type Taylor-Galerkin en éléments finis

Third-order numerical schemes for hyperbolic problems

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Workflow Resiliency for Large-Scale Distributed Applications

International audienceLarge-scale simulation and optimization are demanding applications that require high-performance computing platforms. Because their economic impact is fundamental to the industry, they also require robust, seamless and effective mechanisms to support dynamic user interactions, as well as fault-tolerance and resiliency on parallel computing platforms. Distributed workflows are considered here as a means to support large-scale dynamic and resilient multiphysics simulation and optimization applications, such as multiphysics aircraft simulation