Literatura científica selecionada sobre o tema "Mécanique des fluides – Simulation par ordinateur"
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Artigos de revistas sobre o assunto "Mécanique des fluides – Simulation par ordinateur"
Gama, Amor, Mourad Haddadi e Ali Malek. "Etude et réalisation d’un concentrateur cylindro parabolique avec poursuite solaire aveugle". Journal of Renewable Energies 11, n.º 3 (30 de setembro de 2008). http://dx.doi.org/10.54966/jreen.v11i3.94.
Texto completo da fonteBoudali Errebai, Farid, Lotfi Derradji, Yassine Maoudj, Mohamed Amara e Abderrahmane Mokhtari. "Confort thermique d’un local d’habitation: Simulation thermoaéraulique pour différents systèmes de chauffage". Journal of Renewable Energies 15, n.º 1 (23 de outubro de 2023). http://dx.doi.org/10.54966/jreen.v15i1.303.
Texto completo da fonteTeses / dissertações sobre o assunto "Mécanique des fluides – Simulation par ordinateur"
Pouchol, Mickaël. "Structures hiérarchiques pour la simulation de fluides". Limoges, 2010. https://aurore.unilim.fr/theses/nxfile/default/93ee02e3-c56f-4e8f-9b5a-8300d06a4c15/blobholder:0/2010LIMO4025.pdf.
Texto completo da fonteFluid flow simulation such as water or smoke is one of the most covered natural phenomena in the computer graphics community. Among these methods, lagrangian ones which divide the fluid into a set of particles, are usually favored for their efficiency, however they require suitable data structures in several steps to reduce their high computation times. We suggest to use a hierarchical hash table to handle the collision detection step with irregularly distributed and objects with variable sizes. The use of several hash levels allows to benefit from objects spatial coherence and to drastically reduce hash collisions. Adaptive methods allow to efficiently allocate computational resources to significant fluid regions by varying particles sizes during the simulation. In this case a hierarchical grid or hash table structure allows to efficiently handle nearest neighbors search by inserting each particle in the appropriate grid level, and also allows to define appropriate merging or splitting regions with local criteria. Finally the visualization step is challenging because the end-user will appreciate the final result directly. For lagrangian methods, the most common way to deal with this problem is to use blob-based methods that do not yield satisfying results ; we use the variational surface method for this task
Michel, Bertrand. "Contribution à la simulation numérique efficace des écoulements dans les prises d'air supersoniques". Paris, ENSAM, 2004. http://www.theses.fr/2004ENAM0014.
Texto completo da fonteJoubert, de la Motte Pascal. "Schéma à pas de temps caractéristique pour l'aérodynamique transsonique et conception aéroélastique optimale d'aile de grand allongement". Paris, ENSAM, 2007. https://pastel.archives-ouvertes.fr/tel-00144844.
Texto completo da fonteThe MBDA Aerolog software is commonly used for computing steady compressible flows over complex geometries. The residual-distribution scheme of Lax-Wendroff-Ni is coupled with an implicit residual smoothing technique to provide a low cost per iteration and a flexible use in multi-block computational domains. In order to improve the code efficiency for the simulation of unsteady flows a so-called characteristic timestep upwind scheme is proposed in this work: its compact stencil allows to preserve the existing boundary and interface treatments. This scheme is coupled with a new matrix-free implicit stage and applied in the framework of a dual time-step technique. The results provided by this new approach are analyzed from the viewpoint of accuracy and efficiency for steady and unsteady flows over airfoils and rudders and compared with those produced by the existing method. The optimal design of a wing is studied next in the context of static aeroelasticity: since the wings of a cruise missile are hollowed out, one seeks to take advantage of the associated aeroelastic effects to maximise the range of the missile. A fully automated aeroelastic computational chain is developed to perform a numerical study of these effects and a first parametric study is carried out to assess the relevance of the chosen parameters and the accuracy of the methods employed
Cherubini, Stefania. "Linear and non-linear global instability of attached and separated boundary-layer flows over a flat plate". Paris, ENSAM, 2010. http://www.theses.fr/2010ENAM0012.
Texto completo da fonteLe but de cette thèse est de décrire en détail la dynamique linéaire et non linéaire d'une couche limite attachée sur une plaque plane à bas nombre de Reynolds. La dynamique linéaire, pilotée par les interactions entre les vecteurs propres non-orthogonaux, est étudiée à travers deux méthodes différentes d’instabilité globale : une analyse globale aux vecteurs propres et une optimisation directe-adjointe. Dans ces analyses globales, aucune structure spatiale n’est imposée à priori pour la perturbation, les effets convectifs dus au fort non parallélisme de l’écoulement sont pris en compte. Pour le cas de la couche limite décollée, le déclenchement des instationnarités a été clarifié : i) pour une forte amplification des perturbations de nature convective et bidimensionnelle ; ii) pour des effets de non normalité longitudinale engendrant le phénomène du flapping ; iii) pour une forte sensibilité vis-à-vis d’un forçage harmonique ; iv) pour un monde tridimensionnel globalement instable. Pour une couche limite attachée, le but a été d’identifier les perturbations localisées caractérisées par des fréquences multiples dans les directions longitudinales et transversales de l’écoulement, induisant une amplification de l’énergie des perturbations. Pour évaluer les effets les effets de la non linéarité dans les mécanismes d’instabilité identifiés par les analyses de stabilité globale, des simulations numériques directes ont été réalisées pour les écoulements de couche limite attachées ou décollées, bidimensionnelles et tridimensionnelles. La dynamique des perturbations permettant une plus rapide vers la turbulence a été étudiée. Différents scénarios de transition ont été observés, les différents mécanismes de transition ont été analysés
Mougin, Guillaume. "Interactions entre la dynamique d'une bulle et les instabilités de son sillage". Toulouse, INPT, 2001. http://www.theses.fr/2001INPT042H.
Texto completo da fonteCastaldi, Stéphane. "Étude de la turbulence cinématiquement homogène isotrope et massiquement inhomogène par simulation numérique directe". Toulouse, INPT, 1999. http://www.theses.fr/1999INPT008H.
Texto completo da fonteSergent, Emmanuel. "Vers une méthodologie de couplage entre la simulation des grandes échelles et les modèles statistiques". Ecully, Ecole centrale de Lyon, 2002. http://www.theses.fr/2002ECDL0019.
Texto completo da fonteThe numerical simulation in turbulent fluids mechanics is based on three different approaches. Direct Numerical Simulation (DNS), Large Eddy Simulation (LES) and statistical RANS methods. The work completed in this Phd aims at defining a coupling methodology between LES and RANS. These two approaches are indeed complementary for industrial applications. RANS methods will calculate the total flow field and LES will be used as "zoom" in a precise zone of the geometry. With an aim of carrying out the coupling, three approaches are adopted : one for a coupling in the direction RANS towards LES (named MV), one in the direction LES towards RANS and for tangent coupling. After a series of tests aiming at optimizing the choice of the parameters involved in the MV, these three techniques were applied to an academic case : the flow between two parallel plane plates. Finally the MV method was tested on a more complex flow : the flow around a forward-backward facing step
Agbaglah, Gbémého Gilou. "Dynamique et instabilité des nappes liquides". Paris 6, 2011. http://www.theses.fr/2011PA066195.
Texto completo da fonteVintimiglia, Anne-Sophie. "Implémentation d'une cinétique de cristallisation des polymères dans une simulation numérique bidimensionnelle par éléments finis : application à l'injection des thermoplastiques et au procédé push-pull". ENSMP, 1999. http://www.theses.fr/1999ENMP0868.
Texto completo da fonteMoussière, Sandrine. "Etude par simulation numérique des écoulements turbulents réactifs dans les réacteurs d'oxydation hydrothermale : application à un réacteur agité double enveloppe". Aix-Marseille 3, 2006. http://www.theses.fr/2006AIX30045.
Texto completo da fonteSupercritical water oxidation is an innovative process to treat organic liquid waste which uses supercritical water properties to mix efficiency the oxidant and the organic compounds. The reactor is a stirred double shell reactor. In the step of adaptation to nuclear constraints, the computational fluid dynamic modeling is a good tool to know required temperature field in the reactor for safety analysis. Firstly, the CFD modeling of tubular reactor confirms the hypothesis of an incompressible fluid and the use of k-[oméga] turbulence model to represent the hydrodynamic. Moreover, the EDC model is as efficiency as the kinetic to compute the reaction rate in this reactor. Secondly, the study of turbulent flow in the double shell reactor confirms the use of 2D axisymetric geometry instead of 3D geometry to compute heat transfer. Moreover, this study reports that water-air mixing is not in single phase. The reactive turbulent flow is well represented by EDC model after adaptation of initial conditions. The reaction rate in supercritical water oxidation reactor is mainly controlled by the mixing
Livros sobre o assunto "Mécanique des fluides – Simulation par ordinateur"
C, Pozrikidis, ed. Modeling and simulation of capsules and biological cells. Boca Raton, Fla: Chapman & Hall/CRC, 2003.
Encontre o texto completo da fonteG, Baker, Karihaloo B. L e International Union of Theoretical and Applied Mechanics., eds. Fracture of brittle, disordered materials: Concrete, rock and ceramics : proceedings of the International Union of Theoretical and Applied Mechanics (IUTAM) Symposium on Fracture of Brittle, Disordered Materials : Concrete, Rock and Ceramics, 20-24 September 1993, the University of Queensland, Brisbane, Australia. London: E & FN Spon, 1995.
Encontre o texto completo da fonteCai, Yang. Digital human modeling: Trends in human algorithms. Berlin: Springer, 2008.
Encontre o texto completo da fonteCai, Yang. Digital human modeling: Trends in human algorithms. Berlin: Springer, 2008.
Encontre o texto completo da fonteTu, Jiyuan. Computational fluid dynamics: A practical approach. Amsterdam: Butterworth-Heinemann, 2008.
Encontre o texto completo da fonteSimulation of Fluid Power Systems with LMS Imagine. Lab Amesim. Taylor & Francis Group, 2018.
Encontre o texto completo da fonteFluid Engine Development. CRC Press LLC, 2017.
Encontre o texto completo da fonteKim, Doyub. Fluid Engine Development. CRC Press LLC, 2017.
Encontre o texto completo da fonteKim, Doyub. Fluid Engine Development. CRC Press LLC, 2017.
Encontre o texto completo da fonteFluid Engine Development. Taylor & Francis Group, 2016.
Encontre o texto completo da fonte