Vall de Núria, 9 a l'11 de gener del 2007

Summary

  • NEFEM for EULER equations 

    Sevilla Cárdenas, Rubén; Fernandez Mendez, Sonia; Huerta, Antonio (2009-02-16T11:29:15Z)
    Conference report
    Open Access
    An improvement of the classical finite element method is proposed in [1], the NURBS-Enhanced Finite Element Method (NEFEM). It considers an exact representation of the geometry by means of the usual CAD description of the ...
  • An interactive mesh generation environment for geometry-based simulations. Progress updated 

    Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2009-02-16T12:15:10Z)
    Conference report
    Open Access
    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 ...
  • 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)
    Conference report
    Open Access
    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 ...
  • Derivation of shallow water models for steady and transient phenomena, required assumptions and resulting equations 

    Steffens, Lindaura Maria; Díez, Pedro (2009-04-07T11:25:00Z)
    Conference report
    Open Access
    The shallow water models describe water flow in rivers, lakes and shallow seas. They are used to study many physical phenomena of interest, such as, modeling environmental effects, commercial activities on fisheries and ...
  • Shock capturing for discontinuous Galerkin methods 

    Casoni Rero, Eva; Huerta, Antonio (2009-04-23T10:42:49Z)
    Conference report
    Open Access
    This work is devoted to solve scalar hyperbolic conservation laws in the presence of strong shocks with discontinuous Galerkin methods (DGM). A standard approach is to use limiting strategies in order to avoid oscillations ...
  • Automatic generation of quadrilateral structured meshes using linear programming and transfinite interpolation 

    Ruiz Gironès, Eloi; Sarrate Ramos, Josep (2009-04-30T11:25:15Z)
    Conference report
    Open Access
    This paper presents an implementation of a structured quadrilateral algorithm called submapping. The meshing procedure splits the geometry into patches and then meshes each patch separately preserving the mesh compatibility ...
  • Generación de mallas de hexaedros en geometrías múltiplemente conexas mediante submapping 

    Ruiz Gironès, Eloi; Sarrate Ramos, Josep (2009-05-26T11:36:11Z)
    Conference report
    Open Access
    En este trabajo se presenta una mejora del método de submapping para ampliar su aplicabilidad. El algoritmo de submapping tiene dos limitaciones principales. La primera de ellas es que sólo se puede aplicar en geometrías ...
  • Solmec: an efficient c++ library to solve linear and nonlinear elasticity problems 

    Rosolen, Adrián Martín; Millán, Raúl Daniel; Arroyo Balaguer, Marino (2009-06-02T09:11:26Z)
    Conference report
    Open Access
    A C++ library based on local maximum-entropy approximation schemes to solve linear and nonlinear elasticity problem is presented. The available tools are briefly described, and several implementation details are also ...
  • Hierarchical x-fem applied to n-phase flow 

    Zlotnik, Sergio; Díez, Pedro (2009-06-02T09:26:48Z)
    Conference report
    Open Access
    In this work we proposed an extencion of the level set technique to track any number of free surfaces. This extension is based in a hierarchical ordering of several level set functions. To complete the X–FEM approach, the ...
  • Galerkin discontinuo local aplicado a problemas de ondas acústicas: condiciones de frontera absorbente locales de bajo orden 

    Cadenas, Carlos; Fernandez Mendez, Sonia; Huerta, Antonio (2009-06-02T10:26:49Z)
    Conference report
    Open Access
    En este trabajo se presenta una comparación de la solución numérica de la ecuación de Helmholtz utilizando el método de elementos finitos Galerkin Discontinuo Local (LDG) con varias condiciones de contorno absorbentes ...
  • 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 ...
  • 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)
    Conference report
    Open Access
    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 ...
  • Shock-capturing with discontinuous garlekin methods 

    Huerta, Antonio; Casoni, Eva (2009-06-08T08:32:41Z)
    Conference report
    Open Access
    A shock capturing strategy for high order Discontinuous Galerkin methods for conservation laws is proposed. We present a method in the one-dimensional case based on the introduction of artificial viscosity into the ...
  • Acoplamiento del modelo regional de calidad de aire (CMAQ) con el modelo de emisiones locales mediante elementos finitos 

    Pérez Foguet, Agustí; Oliver Serra, Albert (2009-06-08T09:47:57Z)
    Conference report
    Open Access
    Existen modelos regionales de calidad del aire que son muy utilizados. Estos modelos tienen modelos para estudiar el aporte de contaminantes provocados por fuentes importantes de contaminación, como pueden ser chimeneas, ...
  • 3D nurbs-enhanced finite element method 

    Sevilla Cárdenas, Rubén; Fernandez Mendez, Sonia; Huerta, Antonio (2009-06-08T10:12:04Z)
    Conference report
    Open Access
    An improvement of the classical finite element method is proposed in [1], the NURBS-Enhanced Finite Element Method (NEFEM). It is able to exactly represent the geometry by means of the usual CAD description of the boundary ...
  • 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 ...
  • Numerical integration by using local-node gauss-hermite cubature 

    Millán, Raúl Daniel; Rosolen, Adrián Martín; Arroyo Balaguer, Marino (2009-06-08T10:53:59Z)
    Conference report
    Open Access
    A local–node numerical integration scheme for meshless methods is presented in this work. The distinguishing characteristic of the introduced scheme is that not support mesh or grid to perform numerical integration is ...
  • Simple assessment of the numerical wave number in the fe solution of the helmholtz equation 

    Steffens, Lindaura Maria; Díez, Pedro (2009-06-08T11:13:41Z)
    Conference report
    Open Access
    When numerical methods are applied to the computation of stationary waves, it is observed that "numerical waves" are dispersive for high wave numbers. The numerical wave shows a phase velocity which depends on the wave ...
  • The block gauss-seidel method in sound transmission problems 

    Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2009-06-08T11:23:31Z)
    Conference report
    Open Access
    Sound transmission through partitions can be modelled as an acoustic fluid-elastic structure interaction problem. The block Gauss-Seidel iterative method is used in order to solve the finite element linear system of ...
  • Strict error bounds in linear solid mechanics using a subdomain-based flux-free approach 

    Cottereau, Regis; Díez, Pedro (2009-06-08T11:56:46Z)
    Conference report
    Open Access
    In this paper, we derive, in the framework of the ux-free method, strict bounds for the energy norm of the error associated to a finite element computation. In that framework, and when using linear elements, the problems ...