Now showing items 1-20 of 26

  • A critical comparison of two discontinuous galerkin methods for the navier-stokes equations using solenoidal aproximations 

    Villardi de Montlaur, Adeline de; Peraire Guitart, Jaume; Huerta, Antonio (2009-06-08T07:49:26Z)
    Conference report
    Open Access
    This paper compares two methods to solve incompressible problems, in particular the Navier-Stokes equations, using a discontinuous polynomial interpolation that is exactly divergence-free in each element. The first method ...
  • A discontinuous galerkin formulation for solid dynamics 

    Peraire Guitart, Jaume; Bonet Carbonell, Javier; Huerta, Antonio; Persson, Per Olof; Vidal Seguí, Yolanda (Omnipress, 2006)
    Lecture
    Open Access
  • A distortion measure to validate and generate curved high-order meshes on CAD surfaces with independence of parameterization 

    Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (John Wiley & Sons, 2016-06)
    Article
    Open Access
    A framework to validate and generate curved nodal high-order meshes on Computer-Aided Design (CAD) surfaces is presented. The proposed framework is of major interest to generate meshes suitable for thin-shell and 3D finite ...
  • Análisis no lineal de tanques criogénicos bajo cargas térmicas 

    Oliver Olivella, Xavier; Oñate Ibáñez de Navarra, Eugenio; Peraire Guitart, Jaume; Chueca Castedo, Rosa Mariana (1985-04)
    Article
    Open Access
  • A posteriori finite element error bounds for non-linear outputs of the Helmholtz equation 

    Sarrate Ramos, Josep; Peraire Guitart, Jaume; Patera, A. (1999-09)
    Article
    Open Access
    A Neumann subproblem a posteriori finite element procedure for the efficient and accurate calculation of rigorous, constant-free upper and lower bounds for non-linear outputs of the Helmholtz equation in two-dimensional ...
  • Are high-order and hybridizable discontinuous galerkin methods competitive 

    Huerta, Antonio; Roca Navarro, Francisco Javier; Angeloski, Aleksander; Peraire Guitart, Jaume (2012)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • A simple shock-capturing technique for high-order discontinuous Galerkin methods 

    Huerta, Antonio; Casoni Rero, Eva; Peraire Guitart, Jaume (2012-08)
    Article
    Open Access
    This article presents a novel shock-capturing technique for the discontinuous Galerkin (DG) method. The technique is designed for compressible flow problems, which are usually characterized by the presence of strong shocks ...
  • Bounds and adaptivity for 3D limit analysis 

    Muñoz, José J.; Bonet Carbonell, Javier; Huerta, Antonio; Peraire Guitart, Jaume (2009-06-08T10:28:14Z)
    Conference report
    Open Access
    In the present paper we compute upper and lower bounds for limit analysis in two and three dimensions. From the solution of the discretised upper and lower bound problems, and from the optimum displacement rate and stress ...
  • Computing bounds for linear functionals of exact weak solutions to Poisson's equation 

    Sauer-Budge, A. M.; Bonet Carbonell, Javier; Huerta, Antonio; Peraire Guitart, Jaume (2004-01)
    Article
    Open Access
    We present a method for Poisson’s equation that computes guaranteed upper and lower bounds for the values of piecewise-polynomial linear functional outputs of the exact weak solution of the infinite-dimensional continuum ...
  • Computing upper and lower bounds for the J-integral in two-dimensional linear elasticity 

    Xuan, Z C; Parés Mariné, Núria; Peraire Guitart, Jaume (2006-01)
    Article
    Open Access
    We present an a posteriori method for computing rigorous upper and lower bounds for the J-integral in two-dimensional linear elasticity. The J-integral, which is typically expressed as a contour integral, is recast as a ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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
    Open Access
    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
    Open Access
    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
    Open Access
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference lecture
    Restricted access - publisher's policy
    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
    Open Access
    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)
    Conference lecture
    Open Access
    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
    Open Access
    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 ...