Exploració per autor "Peraire Guitart, Jaume"

Ara es mostren els items 14-29 de 29

    • 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 ...

    • Discontinuous Galerkin methods for the Navier–Stokes equations using solenoidal approximations 

      Villardi de Montlaur, Adeline de; Fernández Méndez, Sonia; Peraire Guitart, Jaume; Huerta, Antonio (2010-10-20)
      Article
      Accés obert
      An interior penalty method and a compact discontinuous Galerkin method are proposed and compared for the solution of the steady incompressible Navier–Stokes equations. Both compact formulations can be easily applied using ...

    • 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 ...

    • 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 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 ...

    • One-dimensional shock-capturing for high-order discontinuous Galerkin methods 

      Casoni Rero, Eva; Peraire Guitart, Jaume; Huerta, Antonio (2012-02)
      Article
      Accés obert
      Discontinuous Galerkin methods have emerged in recent years as an alternative for nonlinear conservation equations. In particular, their inherent structure (a numerical flux based on a suitable approximate Riemann solver ...

    • Optimal collapse simulator for three-dimensional frames 

      Sarrate Ramos, Josep; Huerta, Antonio; Bonet Carbonell, Javier; Peraire Guitart, Jaume; Saà Seoane, Joel; Vidal Codina, Ferran (Universitat Politècnica de Catalunya. Escola Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-15)
      Comunicació de congrés
      Accés obert
      In this work a limit analysis for 3D structures software package is presented. The goal is to obtain for a certain structure the load factor λ that applied to the external loads induces collapse to the structure. The ...

    • 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 ...

    • Strict upper and lower boundswith adaptive remeshing in limit state analysis 

      Muñoz, José J.; Huerta, Antonio; Bonet Carbonell, Javier; Peraire Guitart, Jaume (2009-04-03T10:56:47Z)
      Text en actes de congrés
      Accés obert
      By writing the limit state analysis as an optimisation problem, and after resorting to suitable discretisations of the stress and velocity field, we compute strict bounds of the load factor. The optimisation problem is ...

    • The computation of bounds for linear-functional outputs of weak solutions to the two-dimensional elasticity equations 

      Parés Mariné, Núria; Bonet, J; Huerta, Antonio; Peraire Guitart, Jaume (2006-01)
      Article
      Accés obert
      We present a method for the computation of upper and lower bounds for linear-functional outputs of the exact solutions to the two dimensional elasticity equations. The method can be regarded as a generalization of the well ...

    • The efficient computation of bounds for functionals of finite element solutions in large strain elasticity 

      Bonet, J; Huerta, Antonio; Peraire Guitart, Jaume (2002-09)
      Article
      Accés obert
      We present an implicit a posteriori finite element procedure to compute bounds for functional outputs of finite element solutions in large strain elasticity. The method proposed relies on the existence of a potential energy ...

    • Un método de captura de choques basado en las funciones de forma para Galerkin discontinuo de alto orden 

      Casoni Rero, Eva; Peraire Guitart, Jaume; Huerta, Antonio (2012)
      Article
      Accés obert
      En este artículo se presenta un método de alto orden de Galerkin discontinuo para problemas de flujo com- presible, en los cuales es muy frecuente la aparición de choques. La estabilización se introduce mediante una nueva ...

    • Upper and lower bounds in limit analysis: adaptive meshing strategies and discontinuous loading 

      Muñoz Romero, José; Bonet Carbonell, Javier; Huerta, Antonio; Peraire Guitart, Jaume (2008-08)
      Article
      Accés obert

    • Validation and generation of high-order meshes on parameterized surfaces 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (Sociedad Española de Métodos Numéricos en Ingeniería (SEMNI), 2013)
      Text en actes de congrés
      Accés obert
      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 ...