Exploració per autor "Roca Navarro, Francisco Javier"

Ara es mostren els items 12-31 de 51

    • Checking and improving the geometric accuracy of non-interpolating curved high-order meshes 

      Ruiz Gironés, Eloi; Sarrate Ramos, Josep; Roca Navarro, Francisco Javier (Elsevier, 2015)
      Comunicació de congrés
      Accés obert

    • Combining size-preserving and smoothing procedures for adaptive quadrilateral mesh generation 

      Ruiz Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Springer, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      It 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. However, the ...

    • Conformal marked bisection for local refinement of n-dimensional unstructured conformal meshes 

      Belda Ferrín, Guillem; Ruiz Gironès, Eloi; Roca Navarro, Francisco Javier; Gargallo Peiró, Abel (Elsevier, 2023-01-01)
      Article
      Accés obert
      We present an n-dimensional marked bisection method for unstructured conformal meshes. We devise the method for local refinement in adaptive n-dimensional applications. To this end, we propose a mesh marking pre-process ...

    • Curved geometry modeling: interpolation of subdivision features 

      Jiménez Ramos, Albert; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Barcelona Supercomputing Center, 2021-05)
      Text en actes de congrés
      Accés obert
      We present a nodal interpolation method to approximate a subdivision model. The main application is to model and represent curved geometry without gaps and preserving the required simulation intent. Accordingly, the ...

    • Defining a stretching and alignment aware quality measure for linear and curved 2D meshes 

      Aparicio Estrems, Guillermo; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Barcelona Supercomputing Center, 2019-05-07)
      Text en actes de congrés
      Accés obert
      We define a regularized shape distortion (quality) measure for curved high-order 2D elements on a Riemannian plane. To this end, we measure the deviation of a given 2D element, straight-sided or curved, from the stretching ...

    • Defining a stretching and alignment aware quality measure for linear and curved 2D meshes 

      Aparicio Estrems, Guillermo; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (Springer, 2018)
      Text en actes de congrés
      Accés obert
      We define a regularized shape distortion (quality) measure for curved high-order 2D elements on a Riemannian plane. To this end, we measure the deviation of a given 2D element, straight-sided or curved, from the stretching ...

    • 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 ...

    • Defining quality measures for validation and generation of high-order meshes 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (Springer, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A procedure to quantify the distortion (quality) of a high-order mesh composed by curved tetrahedral elements is presented. The proposed technique has two main applications. First, it can be used to check the validity and ...

    • 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 ...

    • Efficiency of high-order elements for continuous and discontinuous Galerkin methods 

      Huerta, Antonio; Angeloski, Aleksandar; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume (John Wiley & sons, 2013-11)
      Article
      Accés obert
      To evaluate the computational performance of high-order elements, a comparison based on operation count is proposed instead of runtime comparisons. More specifically, linear versus high-order approximations are analyzed ...

    • Generation of curved high-order meshes with optimal quality and geometric accuracy 

      Ruiz Gironés, Eloi; Sarrate Ramos, Josep; Roca Navarro, Francisco Javier (2016)
      Article
      Accés obert
      We present a novel methodology to generate curved high-order meshes featuring optimal mesh quality and geometric accuracy. The proposed technique combines a distortion measure and a geometric L2-disparity measure into a ...

    • Generation of curved high-order meshes with optimal quality and geometric accuracy 

      Ruiz Gironés, Eloi; Sarrate Ramos, Josep; Roca Navarro, Francisco Javier (Elsevier, 2016)
      Text en actes de congrés
      Accés obert
      We present a novel methodology to generate curved high-order meshes featuring optimal mesh quality and geometric accuracy. The proposed technique combines a distortion measure and a geometric L2-disparity measure into a ...

    • 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 obert
      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 ...

    • Inserting curved boundary layers for viscous flow simulation with high-order tetrahedra 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Peraire Guitart, Jaume (Springer, 2013)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      We propose an a posteriori approach for generating curved meshes for viscous flow simulations composed by high-order tetrahedra. The proposed approach is performed in the following three steps: (1) generate a linear ...

    • Interpolation of subdivision features for curved geometry modeling 

      Jiménez Ramos, Albert; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (2022-04)
      Article
      Accés obert
      We present a nodal interpolation method to approximate a subdivision model. The main application is to model and represent curved geometry without gaps and preserving the required simulation intent. Accordingly, we devise ...

    • 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 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 obert
      We 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 obert
      We 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, ...