Ara es mostren els items 1-20 de 28

  • A new least-squares approximation of affine mappings for sweep algorithms 

    Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Huerta, Antonio (2010-06)
    Article
    Accés obert
    This paper presents a new algorithm to generate hexahedral meshes in extrusion geometries. Several algorithms have been devised to generate hexahedral meshes by projecting the cap surfaces along a sweep path. In all of ...
  • A new procedure to compute imprints in multi-sweeping algorithms 

    Ruiz-Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2009-10-25)
    Text en actes de congrés
    Accés obert
    One of the most widely used algorithms to generate hexahedral meshes in extrusion volumes with several source and target surfaces is the multi-sweeping method. However, the multi-sweeping method is highly dependent on the ...
  • A new procedure to smooth and untangle meshes on parameterized surfaces 

    Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Vienna University of Technology, 2012)
    Text en actes de congrés
    Accés obert
    We present a technique to extend any distortion (quality) measure for planar meshes to meshes on parameterized surfaces. The resulting distortion (quality) measure is expressed in terms of the parametric coordinates of the ...
  • A surface mesh smoothing and untangling method independent of the CAD parameterization 

    Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2014-04-01)
    Article
    Accés obert
    A method to optimize triangular and quadrilateral meshes on parameterized surfaces is proposed. The optimization procedure relocates the nodes on the surface to improve the quality (smooth) and ensures that the elements ...
  • An automatic and general least-squares projection procedure for sweep meshing 

    Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2010-01-07)
    Article
    Accés obert
  • An interactive mesh generation environment for geometry-based simulations. Progress updated 

    Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2009-02-16T12:15:10Z)
    Text en actes de congrés
    Accés obert
    We presented an overview of an interactive mesh generation environment in our previous work that it is being developed in the Laboratori de Càlcul Numèric (LaCàN). We started the development of the software in order to ...
  • Are high-order and hybridizable discontinuous galerkin methods competitive 

    Huerta, Antonio; Roca Navarro, Francisco Javier; Angeloski, Aleksander; Peraire Guitart, Jaume (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The talk covered several issues motivated by a practical engineering wave propagation problem: real-time evaluation of wave agitation in harbors. The first part, presented the application of a reduced order model in the ...
  • Automatic generation of hexahedral meshes for volumes with non-planar surfaces using the multi-sweeping method 

    Ruiz-Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2010)
    Text en actes de congrés
    Accés obert
    One of the most used algorithms to generate hexahedral meshes for extrusion volumes is the multi-sweeping method. The algorithm decomposes the geometry into many-to-one sub-volumes and then meshes each sub-volume ...
  • Defining an2-disparity measure to check and improve the geometric accuracy of noninterpolating curved high-order meshes 

    Ruiz Gironés, Eloi; Sarrate Ramos, Josep; Roca Navarro, Francisco Javier (Elsevier, 2015)
    Text en actes de congrés
    Accés obert
    We define an2-disparity measure between curved high-order meshes and parameterized manifolds in terms of an2norm. The main application of the proposed definition is to measure and improve the distance between a curved high-order ...
  • Distortion and quality measures for validating and generating high-order tetrahedral meshes 

    Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (2015-07-01)
    Article
    Accés obert
    A procedure to quantify the distortion (quality) of a high-order mesh composed of curved tetrahedral elements is presented. The proposed technique has two main applications. First, it can be used to check the validity and ...
  • GPU-accelerated sparse matrix-vector product for a hybridizable discontinuous Galerkin method 

    Roca Navarro, Francisco Javier; Nguyeny, N.C.; Peraire Guitart, Jaume (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The iterative solution of the large systems of equations that result from discontinuous Galerkin (DG) discretizations require the ability to carry out fast matrix-vector products. DG matrices have a sparse block structure ...
  • High-order mesh curving by distortion minimization with boundary nodes free to slide on a 3D CAD representation 

    Ruiz-Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2016-03)
    Article
    Accés restringit per política de l'editorial
    We propose a 3D mesh curving method that converts a straight-sided mesh to an optimal-quality curved high-order mesh that interpolates a CAD boundary representation. The main application of this method is the generation ...
  • High-order mesh generation on CAD geometries 

    Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We present a technique to extend Jacobian-based distortion (quality) measures for planar triangles to high-order isoparametric elements of any interpolation degree on CAD parameterized surfaces. The resulting distortion ...
  • 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 obert
    Sweep 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 dual contributions: representing dual surfaces for block meshing 

    Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Wiley and Sons, 2010-08-06)
    Article
    Accés obert
    In 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 obert
    In 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 ...
  • Mesh projection between parametric surfaces 

    Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Huerta, Antonio (2006-06)
    Article
    Accés obert
    This 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 ...
  • 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 obert
    We 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 obert
    Mesh 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 obert
    Mesh 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 ...