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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Posouzení informačního systému firmy a návrh změn / Information System Efectiveness Assessment and Proposal for ICT Modification

Maška, Michal January 2014 (has links)
The diploma thesis is focused on the evaluation of effectiveness of information system of the selected company. For this evaluation was primarily used method HOS8. In the first part of the thesis are clarified theoretical basis of the work, then the second is an analysis of the company and its information system, in the third part based on the results of the analysis are stated suggestions for increasing the efficiency of the examined information system.
2

Prise en compte de la transition laminaire / turbulent dans un code Navier-Stokes éléments finis non structurés / Automatic prediction of laminar/turbulent transition in an unstructured finite element Navier-Stokes solver

Gross, Raphaël 27 October 2015 (has links)
La thèse vise à intégrer des critères de transition dans le solveur Navier-Stokes non structuré Aether utilisé chez Dassault Aviation. Une méthodologie de prévision de la transition laminaire/turbulent a été élaborée et implémentée dans le solveur RANS Aether. Deux stratégies de calcul de transition ont été testées. Soit Aether est couplé avec le code de couche limite de l’ONERA 3C3D. Soit la position de transition est calculée en utilisant directement les profils de vitesse RANS. Les deux méthodes ont été testées pour des écoulements subsoniques et transsoniques. L’influence des solveurs numériques, des critères de transition et du processus de couplage sont étudiés. L’utilisation de schémas numériques d’ordre élevé est également considérée. / This thesis present the state-of-the-art of the transition prediction numerical chain which has been developed at Dassault Aviation in the RANS solver AETHER. Two strategies for transition location estimations exist. First, AETHER is coupled with the ONERA boundary layer code 3C3D. Second, the transition location is computed by using directly the RANS velocity profiles. Both methods were preliminarily tested in subsonic and transonic. The issues of the influence of the numerical solvers, transition onset criteria and coupling process are studied. The influence of higher order numerical method, are also considered.

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