Academic literature on the topic 'Adaptation de maillages anisotropes'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Adaptation de maillages anisotropes.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Adaptation de maillages anisotropes":
Le Potier, Christophe. "Schéma volumes finis pour des opérateurs de diffusion fortement anisotropes sur des maillages non structurés." Comptes Rendus Mathematique 340, no. 12 (June 2005): 921–26. http://dx.doi.org/10.1016/j.crma.2005.05.011.
Alauzet, Frédéric, Pascal J. Frey, and Bijan Mohammadi. "Adaptation de maillages non structurés pour des problèmes instationnaires." Comptes Rendus Mathematique 335, no. 9 (November 2002): 773–78. http://dx.doi.org/10.1016/s1631-073x(02)02553-0.
Le Potier, Christophe. "Schéma volumes finis monotone pour des opérateurs de diffusion fortement anisotropes sur des maillages de triangles non structurés." Comptes Rendus Mathematique 341, no. 12 (December 2005): 787–92. http://dx.doi.org/10.1016/j.crma.2005.10.010.
Le Potier, Christophe. "Un schéma linéaire vérifiant le principe du maximum pour des opérateurs de diffusion très anisotropes sur des maillages déformés." Comptes Rendus Mathematique 347, no. 1-2 (January 2009): 105–10. http://dx.doi.org/10.1016/j.crma.2008.11.006.
Dobrzynski, Cécile, Pascal Frey, and Olivier Pironneau. "Couplage et adaptation de maillage anisotrope pour des simulations de flux d’air dans des géométries complexes." European Journal of Computational Mechanics 16, no. 6-7 (January 2007): 749–73. http://dx.doi.org/10.3166/remn.16.749-773.
Dobrzynski, Cécile, Pascal Frey, and Olivier Pironneau. "Couplage et adaptation de maillage anisotrope pour des simulations de flux d’air dans des géométries complexes." European Journal of Computational Mechanics, August 16, 2007, 749–73. http://dx.doi.org/10.13052/remn.16.749-773.
Dissertations / Theses on the topic "Adaptation de maillages anisotropes":
Bois, Richard. "Adaptation de maillages anisotropes par un estimateur d'erreur hiérarchique." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/29273/29273.pdf.
In this thesis, we present a new hierarchical error estimator that can be used in a mesh adaptation algorithm to obtain a more accurate approximation to the solution of a partial differential equation. This error estimator has many advantages that other existing error estimators do not have or lack of. For instance, it is, by construction, independant of the differential operator used to model a certain physical phenomena. It is also naturally generalisable to the case of approximations of arbitrary order, and this, without any specific treatment to the underlying theory. Finally, it is efficient, optimal in a sense that will be defined and permits the elements to stretch in a priviledged direction (anisotropy) in order to obtain high accuracy against regularly refined meshes. Many examples are given in the one, two and three dimensional cases. Analytical examples (the solution is known) is given to measure the effiency and precision of the new error estimator. Other examples of mesh adaptation for equations modeling different physical phenomena like the flow of a fluid around a cylinder, unsteady diffusion and contact between deformable elastic bodies are presented. These examples show that the new error estimator can be used for a wide variety of problems.
Rouxel-Labbé, Mael. "Génération de maillages anisotropes." Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4150/document.
In this thesis, we study the generation of anisotropic meshes using the concepts of Delaunay triangulations and Voronoi diagrams. We first consider the framework of locally uniform anisotropic meshes introduced by Boissonnat, Wormser and Yvinec. Despite known theoretical guarantees, the practicality of this approach has only been hardly studied. An exhaustive empirical study is presented and reveals the strengths but also the overall impracticality of the method. In a second part, we investigate the anisotropic Voronoi diagram introduced by Labelle and Shewchuk and give conditions on a set of seeds such that the corresponding diagram has a dual that is an embedded triangulation in any dimension; an algorithm to generate such sets is devised. Using the same diagram, we propose an algorithm to generate efficiently anisotropic triangulations of low-dimensional manifolds embedded in high-dimensional spaces. Our algorithm is provable, but produces disappointing results. Finally, we study Riemannian Voronoi diagrams and introduce discrete Riemannian Voronoi diagrams, which employ recent developments in the numerical computation of geodesic distances and whose computation is accelerated through the use of an underlying anisotropic graph structure. We give conditions that guarantee that our discrete structure is combinatorially equivalent to the Riemannian Voronoi diagram and that its dual is an embedded triangulation, using both straight and curved simplices. We obtain significantly better results than with our other methods, but the overall utility of
Zerguine, Walid. "Adaptation de maillages anisotropes et écoulements multifluides : Applications en injection assistée eau." Paris, ENMP, 2010. http://www.theses.fr/2010ENMP0082.
The Water Assisted Injection Molding (WAIM) is a recent manufacturing process that produces thermoplastic hollow parts. Numerical simulation is an important step in the development of this innovative technology. The framework of the thesis is the development of a numerical simulation module for the WAIM process. The industrial and technological benefits of this numerical tool will provide crucial information on the sensitivity of the properties of injection molded parts to injection conditions. The hydrodynamics of the multiphase polymer-water-air system is described by the resolution of the Navier-Stokes equations within the framework of an eulerian monolithic formulation. The method consists in solving the system of equations on a single mesh. A distance function allows to describe the interfaces water-polymer and polymer-air to supply the physical properties of every sub-domain. A strategy of anisotropic dynamic mesh adaptation allows to decrease the strong heterogeneities of the phases in presence. Two ways are investigated. The first one considers meshes constructed from a priori metrics based on the gradient of the Levelset function and the second approach considers the construction of a metric based on a posteriori error estimator minimizing the error of approximation under constraint to keep a constant number of elements. A confrontation in experimental trials confirms the relevance of our tool to predict the evolution of the water vein in a typical WAIM part
Vallet, Marie-Gabrielle. "Génération de maillages éléments finis anisotropes et adaptatifs." Paris 6, 1992. http://www.theses.fr/1992PA066625.
Tye, Gingras Christian. "Adaptation de maillages en parallèle." Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30478/30478.pdf.
Kuate, Raphaël. "Adaptation de maillage anisotrope : étude, construction d'estimateurs d'erreur et raffinement hexaédrique." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2008. http://tel.archives-ouvertes.fr/tel-00363511.
Boiteau, Éloïse. "Adaptation de maillage anisotrope : définition d'une métrique pour discrétisations de degré élevé." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/29325/29325.pdf.
Gruau, Cyril. "Génération de métriques pour adaptation anisotrope de maillages : applications à la mise en forme des matériaux." Phd thesis, École Nationale Supérieure des Mines de Paris, 2004. http://pastel.archives-ouvertes.fr/pastel-00000989.
Barral, Nicolas. "Time-accurate anisotropic mesh adaptation for three-dimensional moving mesh problems." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066476/document.
Time dependent simulations are still a challenge for industry, notably due to problems raised by moving boundaries, both in terms of CPU cost and accuracy. This thesis presents contributions to several aspects of simulations with moving meshes. A moving-mesh algorithm based on a large deformation time step and connectivity changes (swaps) is studied. An elasticity method and an Inverse Distance Weighted interpolation method are compared on many 3D examples, demonstrating the efficiency of the algorithm in handling large geometry displacement without remeshing. This algorithm is coupled with an Arbitrary-Lagrangian-Eulerian (ALE) solver, whose schemes and implementation in 3D are described in details. A linear interpolation scheme is used to handle swaps. Validation test cases showed that the use of swaps does not impact notably the accuracy of the solution, while several other complex 3D examples demonstrate the capabilities of the approach both with imposed motion and Fluid-Structure Interaction problems. Metric-based mesh adaptation has proved its efficiency in improving the accuracy of steady simulation at a reasonable cost. We consider the extension of these methods to unsteady problems, updating the previous fixed-point algorithm thanks to a new space-time error analysis based on the continuous mesh model. An efficient p-thread parallelization enables running 3D unsteady adaptative simulations with a new level of accuracy. This algorithm is extended to moving mesh problems, notably by correcting the optimal unsteady metric. Finally several 3D examples of adaptative moving mesh simulations are exhibited, that prove our concept by improving notably the accuracy of the solution for a reasonable time cost
Couet, Alexandre. "Adaptation de maillage anisotrope : méthode pleinement optimale basée sur un estimateur d'erreur hiérarchique en dimension 3." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28625/28625.pdf.