Exploració per tema "Galerkin methods"

Ara es mostren els items 21-38 de 38

    • High-order implicit time integration for unsteady incompressible flows 

      Villardi de Montlaur, Adeline de; Fernández Méndez, Sonia; Huerta, Antonio (2011-11-30)
      Article
      Accés obert
      The spatial discretization of unsteady incompressible Navier–Stokes equations is stated as a system of differential algebraic equations, corresponding to the conservation of momentum equation plus the constraint due to ...

    • Hybridizable discontinuous Galerkin p-adaptivity for wave propagation problems 

      Giorgiani, Giorgio; Fernández Méndez, Sonia; Huerta, Antonio (2013)
      Article
      Accés obert
      A p-adaptive hybridizable discontinuous Galerkin method for the solution of wave problems is presented in a challenging engineering problem. Moreover, its performance is compared with a high-order continuous Galerkin. The ...

    • Improved accuracy in the scattering analysis of infinitely long ferromagnetic objects 

      Sekulic, Ivan; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The scattering of transversal magnetic (TM) electromagnetic waves impinging on infinitely long homogeneous ferromagnetic objects is usually analyzed with the Poggio-Miller-Chan-Harrington-Wu-Tsai (PMCHWT) integral equation. ...

    • Locking in the incompressible limit for the element-free Galerkin method 

      Huerta, Antonio; Fernández Méndez, Sonia (Wiley and Sons, 2001-04)
      Article
      Accés obert
      Volumetric locking (locking in the incompressible limit) for linear elastic isotropic materials is studied in the context of the element-free Galerkin method. The modal analysis developed here shows that the number of ...

    • Locking in the incompressible limit: pseudo-divergence-free element free Galerkin 

      Vidal Seguí, Yolanda; Villon, Pierre; Huerta, Antonio (2003-09)
      Article
      Accés obert
      Locking in finite elements has been a major concern since its early developments. It appears because poor numerical interpolation leads to an over-constrained system. This paper proposes a new formulation that asymptotically ...

    • Locking in the incompressible limit: pseudo-divergence-free element free Galerkin 

      Vidal Seguí, Yolanda; Villon, Pierre; Huerta, Antonio (2002-11)
      Article
      Accés obert
      Locking in finite elements has been a major concern since its early developments and has been extensively studied. However, locking in mesh-free methods is still an open topic. Until now the remedies proposed in the ...

    • Meshfree methods 

      Huerta, Antonio; Belytscko, T; Fernández Méndez, Sonia; Rabczuk, Timon (John Wiley & Sons, 2004-10)
      Capítol de llibre
      Accés restringit per política de l'editorial
      The aim of this chapter is to provide an in-depth presentation and survey of meshfree particle methods. Several particle approximations are reviewed; the SPH method, corrected gradient methods and the moving least squares ...

    • El método de los segmentos 

      Viamontes Esquivel, Alcides; Perez Sanchez, Ismay; Recarey Morfa, Carlos A. (Universitat Politècnica de Catalunya, 2008)
      Article
      Accés obert
      Se reporta el uso de segmentos como dominio de integración para los métodos libres de mallas de tipo Petrov-Galerkin Local (MLPG). El procedimiento acarrea ventajas en el tratamiento de dominios con forma geométrica ...

    • Un nuevo enfoque para el tratamiento de los términos difusivos en la ecuación de convección-difusión en el método de Galerkin discontinuo 

      Gómez, H; Colominas, I; Navarrina Martínez, Fermín Luis; Casteleiro Maldonado, Manuel (Universitat Politècnica de Catalunya, 2007)
      Article
      Accés obert
      Los modelos utilizados en la práctica para problemas de convección-difusión están habitualmente basados en la ley de Fick. En ciertas aplicaciones el uso de la ley de Fick lineal puede ser adecuado, a pesar de predecir ...

    • On discrete maximum principles for discontinuous Galerkin methods 

      Badia, Santiago; Hierro Fabregat, Alba (2015-04)
      Article
      Accés obert
      The aim of this work is to propose a monotonicity-preserving method for discontinuous Galerkin (dG) approximations of convection–diffusion problems. To do so, a novel definition of discrete maximum principle (DMP) is ...

    • On the design of discontinuous Galerkin methods for elliptic problems based on hybrid formulations 

      Codina, Ramon; Badia, Santiago (2012)
      Report de recerca
      Accés obert
      The objective of this paper is to present a framework for the design of discontinuous Galerkin (dG) methods for elliptic problems. The idea is to start from a hybrid formulation of the problem involving as unknowns the ...

    • On the efficient evaluation of hyper-singular integrals in Galerkin surface integral equation formulations via the direct evaluation method 

      Tamayo Palau, José María; Polimeridis, Athanasios G.; Rius Casals, Juan Manuel; Mosig, Juan Ramón (2010)
      Text en actes de congrés
      Accés obert
      In this paper, the direct evaluation method tailored for the hyper-singular integrals arising in Galerkin surface integral equation formulations is developed.[...] The proposed method utilizes a series of coordinate ...

    • Pseudo-divergence-free element free Galerkin method for incompressible fluid flow 

      Huerta, Antonio; Vidal Seguí, Yolanda; Villon, Pierre (2004-03)
      Article
      Accés obert
      Incompressible modeling in finite elements has been a major concern since its early developments and has been extensively studied. However, incompressibility in mesh-free methods is still an open topic. Thus, instabilities ...

    • Robust mechanisms of ventral furrow invagination require the combination of cellular shape changes 

      Conte, Vito; Muñoz Romero, José; Baum, Buzz; Miodownik, M. (2009-05)
      Article
      Accés obert
      Ventral furrow formation in Drosophila is the first large-scale morphogenetic movement during the life of the embryo, and is driven by co-ordinated changes in the shape of individual epithelial cells within the cellular ...

    • Shock capturing techniques for hp-adaptive finite elements 

      Hierro Fabregat, Alba; Badia, Santiago; Kus, Pavel (2016-09)
      Article
      Accés obert
      The aim of this work is to propose an hp-adaptive algorithm for discontinuous Galerkin methods that is capable to detect the discontinuities and sharp layers and avoid the spurious oscillation of the solution around them. ...

    • Stabilized finite element methods for convection-diffusion-reaction, Helmholtz and Stokes problems 

      Nadukandi, Prashanth; Oñate Ibáñez de Navarra, Eugenio; García Espinosa, Julio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2012)
      Llibre
      Accés obert
      We present three new stabilized finite element (FE) based Petrov–Galerkin methods for the convection–diffusion–reaction (CDR), the Helmholtz and the Stokes problems, respectively.

    • Towards a low dissipation FE scheme for scale resolving turbulent compressible flows 

      Silva, Lucas Gasparino F. da; Lehmkuhl Barba, Oriol; Mira Martínez, Daniel (Barcelona Supercomputing Center, 2019-05-07)
      Text en actes de congrés
      Accés obert

    • Tutorial on Hybridizable Discontinuous Galerkin (HDG) for second-order elliptic problems 

      Sevilla Cárdenas, Rubén; Huerta, Antonio (Springuer International Publishing, 2016)
      Capítol de llibre
      Accés restringit per política de l'editorial
      The HDG is a new class of discontinuous Galerkin (DG) methods that shares favorable properties with classical mixed methods such as the well known Raviart-Thomas methods. In particular, HDG provides optimal convergence of ...