Exploració per tema "Classificació AMS::65 Numerical analysis::65M Partial differential equations, initial value and time-dependent initial-boundary value problems"

Ara es mostren els items 1-20 de 47

    • 3D nurbs-enhanced finite element method 

      Sevilla Cárdenas, Rubén; Fernández Méndez, Sonia; Huerta, Antonio (2009-06-08T10:12:04Z)
      Text en actes de congrés
      Accés obert
      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 ...

    • 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)
      Text en actes de congrés
      Accés obert
      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 Cº interior penalty method for 4th order PDEs 

      Fojo, Dani; Codony Gisbert, David; Fernández Méndez, Sonia (2020-12-01)
      Article
      Accés obert
      A method to solve 4th-order PDEs using the Finite Element Method (FEM) with standard C0 elements is derived and studied. It is based on a special weak form accounting for the discontinuous derivatives of the approximation ...

    • A face-centred finite volume method for second-order elliptic problems 

      Sevilla Cárdenas, Rubén; Giacomini, Matteo; Huerta, Antonio (John Wiley & sons, 2018-08-24)
      Article
      Accés obert
      This work proposes a novel finite volume paradigm, the face-centred finite volume (FCFV) method. Contrary to the popular vertex (VCFV) and cell (CCFV) centred finite volume methods, the novel FCFV defines the solution on ...

    • A hybridizable discontinuous Galerkin phase-field model for brittle fracture 

      Muixí Ballonga, Alba; Fernández Méndez, Sonia; Rodríguez Ferran, Antonio (2019-05-01)
      Article
      Accés obert
      Phase-field models for brittle fracture consider smeared representations of cracks, which are described by a continuous field that varies abruptly in the transition zone between unbroken and broken states. Computationally, ...

    • A locking-free face-centred finite volume (FCFV) method for linear elastostatics 

      Sevilla Cárdenas, Rubén; Giacomini, Matteo; Huerta, Antonio (2019-02-01)
      Article
      Accés obert
      A face-centred finite volume (FCFV) method is proposed for linear elastostatic problems. The FCFV is a mixed hybrid formulation, featuring a system of first-order equations, that defines the unknowns on the faces (edges ...

    • A MGT thermoelastic problem with two relaxation parameters 

      Bazarra, Noelia; Fernández García, José Ramón; Quintanilla de Latorre, Ramón (Springer Nature, 2023-10)
      Article
      Accés obert
      n this paper, we consider, from both analytical and numerical viewpoints, a thermoelastic problem. The so-called MGT model, with two different relaxation parameters, is used for both the displacements and the thermal ...

    • A numerical method for computing unstable quasi-periodic solutions for the 2-D Poiseuille flow 

      Sánchez Casas, José Pablo; Jorba, Angel (1999)
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      Accés obert

    • A problem with viscoelastic mixtures: numerical analysis and computational experiments 

      Fernández, José Ramón; Masid, Maria; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (2021)
      Article
      Accés obert
      In this paper, we study, from the numerical point of view, a dynamic problem involving a mixture of two viscoelastic solids. The mechanical problem is written as a system of two coupled partial differential equations. Its ...

    • A superconvergent hybridisable discontinuous Galerkin method for linear elasticity 

      Sevilla Cárdenas, Rubén; Giacomini, Matteo; Karkoulias, Alexandros; Huerta, Antonio (John Wiley & sons, 2018-10-12)
      Article
      Accés obert
      The first superconvergent hybridisable discontinuous Galerkin method for linear elastic problems capable of using the same degree of approximation for both the primal and mixed variables is presented. The key feature of ...

    • A type III porous-thermo-elastic problem with quasi-static microvoids 

      Bazarra, Noelia; Castejon, Alberto; Fernández, Jose R.; Quintanilla de Latorre, Ramón (2021-12)
      Article
      Accés obert
      In this work we study, from the numerical point of view, a one-dimensional thermoelastic problem where the thermal law is of type III. Quasi-static microvoids are also assumed within the model. The variational formulation ...

    • 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)
      Text en actes de congrés
      Accés obert
      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, ...

    • 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 ...

    • An upwind cell centred Total Lagrangian finite volume algorithm for nearly incompressible explicit fast solid dynamic applications 

      Haider, Jibran; Lee, Chun Hean; Gil, Antonio; Huerta, Antonio; Bonet Carbonell, Javier (2018-10-01)
      Article
      Accés obert
      The paper presents a new computational framework for the numerical simulation of fast large strain solid dynamics, with particular emphasis on the treatment of near incompressibility. A complete set of first order hyperbolic ...

    • Analysis of two thermoelastic problems with the Green–Lindsay model 

      Bazarra, Noelia; Fernández García, José Ramon; Quintanilla de Latorre, Ramón (Springer, 2023-06-01)
      Article
      Accés obert
      In this paper, we analyze, from the numerical point of view, two thermo-elastic problems involving the Green–Lindsay theory. The coupling term is different for each case, involving second order or first order spatial ...

    • Automatic generation of quadrilateral structured meshes using linear programming and transfinite interpolation 

      Ruiz Gironès, Eloi; Sarrate Ramos, Josep (2009-04-30T11:25:15Z)
      Text en actes de congrés
      Accés obert
      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 ...

    • Automatically imposing incremental boundary displacements for valid mesh morphing and curving 

      Ruiz Gironès, Eloi; Gargallo Peiró, Abel; Sarrate Ramos, Josep; Roca, Xevi (2019-07)
      Article
      Accés obert
      We present a new incremental mesh morphing method obtained by proposing and discretizing a solution procedure for the continuous morphing problem. Our method seeks a diffeomorphism that transforms an initial domain to a ...

    • Bounds and adaptivity for 3D limit analysis 

      Muñoz, José J.; Bonet Carbonell, Javier; Huerta, Antonio; Peraire Guitart, Jaume (2009-06-08T10:28:14Z)
      Text en actes de congrés
      Accés obert
      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 ...

    • Consideraciones sobre la aplicación del método de Ritz en la teoría de placas anisótropas 

      Nallim, Liz Graciela; Grossi, Ricardo O. (Universitat Politècnica de Catalunya, 2004)
      Article
      Accés obert

    • Decay for strain gradient porous elastic waves 

      Baldonedo, Jacobo; Fernández, José Ramón; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (2023-02)
      Article
      Accés obert
      We study the one-dimensional problem for the linear strain gradient porous elasticity. Our aim is to analyze the behavior of the solutions with respect to the time variable when a dissipative structural mechanism is ...