Exploració per autor "Roca Navarro, Francisco Javier"
Ara es mostren els items 29-48 de 51
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Least-squares approximation of affine mappings for sweep mesh generation. Functional analysis and applications
Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2013-01)
Article
Accés obertSweep methods are one of the most robust techniques to generate hexahedral meshes in extrusion volumes. The main issue in sweep algorithms is the projection of cap surface meshes along the sweep path. The most competitive ... -
Local bisection for conformal refinement of unstructured 4D simplicial meshes
Belda-Ferrín, Guillem; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Barcelona Supercomputing Center, 2019-05-07)
Text en actes de congrés
Accés obertWe present a conformal bisection procedure for local refinement of 4D unstructured simplicial meshes with bounded minimum shape quality. Specifically, we propose a recursive refine-to-conformity procedure in two stages, ... -
Local bisection for conformal refinement of unstructured 4D simplicial meshes
Belda Ferrín, Guillem; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Springer, 2018)
Text en actes de congrés
Accés obertWe present a conformal bisection procedure for local refinement of 4D unstructured simplicial meshes with bounded minimum shape quality. Specifically, we propose a recursive refine to conformity procedure in two stages, ... -
Local dual contributions: representing dual surfaces for block meshing
Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Wiley and Sons, 2010-08-06)
Article
Accés obertIn this work we present a tool based on the new concept of local dual contributions for directly representing the topology and the approximated geometry of the dual of a block mesh. This tool allows us to obtain a valid ... -
Management, design and developement of a mesh generation environment using open source software
Roca Navarro, Francisco Javier; Ruiz Gironès, Eloi; Sarrate Ramos, Josep (2009-06-08T08:15:56Z)
Text en actes de congrés
Accés obertIn this paper we present an object oriented implementation of a general-purpose mesh generation environment for geometry-based simulations. The aim of this application is to unify available legacy code and new research ... -
Measuring and improving the geometric accuracy of piece-wise polynomial boundary meshes
Ruiz Gironès, Eloi; Sarrate Ramos, Josep; Roca Navarro, Francisco Javier (2021-10-15)
Article
Accés obertWe present a new disparity functional to measure and improve the geometric accuracy of a curved high-order mesh that approximates a target geometry model. We have devised the disparity to account for compound models, be ... -
Mesh projection between parametric surfaces
Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Huerta, Antonio (2006-06)
Article
Accés obertThis paper presents a new algorithm to map a given mesh over a source surface onto a target surface. This projection is determined by means of a least-squares approximation of a transformation defined between the loops of ... -
On curving high-order hexahedral meshes
Gargallo Peiró, Abel; Ruiz Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Elsevier, 2015)
Comunicació de congrés
Accés obertWe present a new definition of distortion and quality measures for high-order hexahedral (quadrilateral) elements. This definition leads to two direct applications. First, it can be used to check the validity and quality ... -
Optimization of a regularized distortion measure to generate curved high-order unstructured tetrahedral meshes
Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (2015-08-03)
Article
Accés obertWe present a robust method for generating high-order nodal tetrahedral curved meshes. The approach consists of modifying an initial linear mesh by first, introducing high-order nodes, second, displacing the boundary nodes ... -
Optimizing mesh distortion by hierarchical iteration relocation of the nodes on the CAD entities
Ruiz-Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Elsevier, 2014)
Text en actes de congrés
Accés obertMesh untangling and smoothing is an important part of the meshing process to obtain high-quality discretizations. The usual approach consists on moving the position of the interior nodes while considering fixed the position ... -
Optimizing mesh distortion by hierarchical iteration relocation of the nodes on the CAD entities
Ruiz Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2014-08)
Article
Accés obertMesh untangling and smoothing is an important part of the meshing process to obtain high-quality discretizations. The usual approach consists on moving the position of the interior nodes while considering fixed the position ... -
Paving the path towards automatic hexahedral mesh generation
Roca Navarro, Francisco Javier (Universitat Politècnica de Catalunya, 2009-07-23)
Tesi
Accés obertEsta tesis versa sobre el desarrollo de las tecnologías para la generación de mallas de hexaedros. El proceso de generar una malla de hexaedros no es automático y su generación requiere varias horas te trabajo de un ingeniero ... -
Preserving isotropic element size functions in adaptivity, quadrilateral and hexahedral mesh generation
Ruiz-Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2013)
Article
Accés restringit per política de l'editorialIn electric circuit theory, it is of great interest to compute the effective resistance between any pair of vertices of a network, as well as the Kirchhoff Index. During the last decade these parametres have been applied ... -
Receding front method: a new approach applied to generate hexahedral meshes of outer domains
Roca Navarro, Francisco Javier; Ruiz-Gironés, Eloi; Sarrate Ramos, Josep (2010)
Text en actes de congrés
Accés restringit per política de l'editorialTwo of the most successful methods to generate unstructured hexahedral meshes are the grid-based methods and the advancing front methods. On the one hand, the grid-based methods generate high quality elements in the inner ... -
Simultaneous untangling and smoothing of quadrilateral and hexahedral meshes using an object-oriented framework
Ruiz-Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Montenegro Armas, Rafael; Escobar Sánchez, José M. (2015-02-01)
Article
Accés obertIn this work, we present a simultaneous untangling and smoothing technique for quadrilateral and hexahedral meshes. The algorithm iteratively improves a quadrilateral or hexahedral mesh by minimizing an objective function ... -
Size preserving mesh generation in adaptivity processes
Ruiz Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Sociedad Española de Métodos Numéricos en Ingeniería (SEMNI), 2013)
Text en actes de congrés
Accés obertIt is well known that the variations of the element size have to be controlled in order to generate a high-quality mesh. Hence, several techniques have been developed to limit the gradient of the element size. Although ... -
Size-preserving size functions and smoothing procedures for adaptive quadrilateral mesh generation
Ruiz-Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2015-07-01)
Article
Accés obertThe generation of meshes that correctly reproduce a prescribed size function is crucial for quadrilateral meshing due to two reasons. First, quadrilateral meshes are difficult to adapt to a given size field by refining or ... -
Specific-purpose globalizations for Newton’s method: anisotropic optimization of curved meshes
Aparicio Estrems, Guillermo; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Barcelona Supercomputing Center, 2020-05)
Text en actes de congrés
Accés obertWe derive an optimization method to adapt straight-edged and curved piece-wise polynomial meshes to the stretching and alignment of a target metric. Two globalization strategies for the optimization method are proposed: ... -
Subdivided linear and curved meshes preserving features of a linear mesh model
Jiménez Ramos, Albert; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Sandia National Laboratories, 2019)
Text en actes de congrés
Accés obertTo provide straight-edged and curved piece-wise polynomial meshes that target a unique smooth geometry while preserving the sharp features and smooth regions of the model, we propose a new fast curving method based on ... -
The receding front method applied to hexahedral mesh generation of exterior domains
Ruiz-Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2011-11-30)
Article
Accés obertTwo of the most successful methods to generate unstructured hexahedral meshes are the grid-based methods and the advancing front methods. On the one hand, the grid-based methods generate high-quality hexahedra in the inner ...