Exploració per autor "Sevilla Cárdenas, Rubén"Més informació

Ara es mostren els items 11-30 de 32

    • Comparison of high-order curved finite elements 

      Sevilla Cárdenas, Rubén; Fernández Méndez, Sonia; Huerta, Antonio (Wiley and Sons, 2011-02-02)
      Article
      Accés restringit per política de l'editorial
      Several finite element techniques used in domains with curved boundaries are discussed and compared, with particular emphasis in two issues: the exact boundary representation of the domain and the consistency of the ...

    • Discontinuous Galerkin approximations in computational mechanics: hybridization, exact geometry and degree adaptivity 

      Giacomini, Matteo; Sevilla Cárdenas, Rubén (Springer, 2019)
      Article
      Accés obert
      Discontinuous Galerkin (DG) discretizations with exact representation of the geometry and local polynomial degree adaptivity are revisited. Hybridization techniques are employed to reduce the computational cost of DG ...

    • Efficient 3d finite element analysis based on cartesian grids considering exact CAD geometries 

      Marco, O.; Sevilla Cárdenas, Rubén; Zhang, Y.; Tur, M.; Ródenas, J.J. (CIMNE, 2015)
      Text en actes de congrés
      Accés obert
      This contribution proposes a 3Dimmersed boundary method,based on Cartesian grids,modified to improve the accuracy along the boundary and the efficiency during the resolution.Onthe one hand, the embedded domain will be ...

    • HDG-NEFEM with degree adaptivity for stokes flows 

      Sevilla Cárdenas, Rubén; Huerta, Antonio (2018-02-07)
      Article
      Accés obert
      The NURBS-enhanced finite element method (NEFEM) combined with a hybridisable discontinuous Galerkin (HDG) approach is presented for the first time. The proposed technique completely eliminates the uncertainty induced by ...

    • HDGlab: an open-source implementation of the hybridisable discontinuous Galerkin method in MATLAB 

      Giacomini, Matteo; Sevilla Cárdenas, Rubén; Huerta, Antonio (2020-10-22)
      Article
      Accés obert
      This paper presents HDGlab, an open source MATLAB implementation of the hybridisable discontinuous Galerkin (HDG) method. The main goal is to provide a detailed description of both the HDG method for elliptic problems and ...

    • Hybridisable discontinuous Galerkin formulation of compressible flows 

      Vila Pérez, Jordi; Giacomini, Matteo; Sevilla Cárdenas, Rubén; Huerta, Antonio (2021)
      Article
      Accés obert
      This work presents a review of high-order hybridisable discontinuous Galerkin (HDG) methods in the context of compressible flows. Moreover, an original unified framework for the derivation of Riemann solvers in hybridised ...

    • Hybridisable discontinuous Galerkin solution of geometrically parametrised Stokes flows 

      Sevilla Cárdenas, Rubén; Borchini, Luca; Giacomini, Matteo; Huerta, Antonio (2020-12-01)
      Article
      Accés obert
      This paper proposes a novel computational framework for the solution of geometrically parametrised flow problems governed by the Stokes equation. The proposed method uses a high-order hybridisable discontinuous Galerkin ...

    • Inclusió de les tic en el portafoli de l’estudiant per a l’ensenyament dels mètodes numèrics 

      Sarrate Ramos, Josep; Rodríguez Ferran, Antonio; Fernández Méndez, Sonia; Sevilla Cárdenas, Rubén; Rozados, Oriol; Díez, Pedro; Huerta, Antonio (2009-02-12T13:49:56Z)
      Comunicació de congrés / Text en actes de congrés
      Accés obert
      La finalitat d’aquest projecte ha estat la millora de la formació global dels estudiants. Concretament, mitjançant la creació d’un portafoli que contingui les diferents activitats que ha realitzat l’estudiant al llarg ...

    • NEFEM for EULER equations 

      Sevilla Cárdenas, Rubén; Fernández Méndez, Sonia; Huerta, Antonio (2009-02-16T11:29:15Z)
      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 considers an exact representation of the geometry by means of the usual CAD description of the ...

    • Nonintrusive proper generalised decomposition for parametrised incompressible flow problems in OpenFOAM 

      Tsiolakis, Vasileios; Giacomini, Matteo; Sevilla Cárdenas, Rubén; Othmer, Carsten; Huerta, Antonio (2020-04)
      Article
      Accés obert
      The computational cost of parametric studies currently represents the major limitation to the application of simulation-based engineering techniques in a daily industrial environment. This work presents the first nonintrusive ...

    • Nonintrusive reduced order model for parametric solutions of inertia relief problems 

      Cavaliere, Fabiola; Zlotnik, Sergio; Sevilla Cárdenas, Rubén; Larráyoz Izcara, Xabier; Díez, Pedro (John Wiley & sons, 2021-08-30)
      Article
      Accés obert
      The Inertia Relief (IR) technique is widely used by industry and produces equilibrated loads allowing to analyze unconstrained systems without resorting to the more expensive full dynamic analysis. The main goal of this ...

    • Numerical integration over 2D NURBS-shaped domains with applications to NURBS-enhanced FEM 

      Sevilla Cárdenas, Rubén; Fernández Méndez, Sonia (2011-10-03)
      Article
      Accés obert
      This paper focuses on the numerical integration of polynomial functions along non-uniform rational B-splines (NURBS) curves and over 2D NURBS-shaped domains, i.e. domains with NURBS boundaries. The integration of the ...

    • NURBS-Enhanced Finite Element Method (NEFEM) 

      Sevilla Cárdenas, Rubén (Universitat Politècnica de Catalunya, 2009-07-24)
      Tesi
      Accés obert
      Aquesta tesi proposa una millora del clàssic mètode dels elements finits (finite element method, FEM) per a un tractament eficient de dominis amb contorns corbs: el denominat NURBS-enhanced finite element method (NEFEM). ...

    • NURBS-enhanced finite element method (NEFEM) 

      Sevilla Cárdenas, Rubén; Fernández Méndez, Sonia; Huerta, Antonio (Wiley and Sons, 2008-10)
      Article
      Accés obert
      An improvement to the classical finite element (FE) method is proposed. It is able to exactly represent the geometry by means of the usual CAD description of the boundary with non-uniform rational B-splines (NURBS). Here, ...

    • NURBS-Enhanced Finite Element Method (NEFEM) 

      Sevilla Cárdenas, Rubén; Fernández Méndez, Sonia; Huerta, Antonio (2011-11)
      Article
      Accés obert
      The development of NURBS-Enhanced Finite Element Method (NEFEM) is revisited. This technique allows a seamless integration of the CAD boundary representation of the domain and the finite element method (FEM). The importance ...

    • NURBS-enhanced finite element method for Euler equations 

      Sevilla Cárdenas, Rubén; Fernández Méndez, Sonia; Huerta, Antonio (2008-07)
      Article
      Accés obert
      In this work, the NURBS-enhanced finite element method (NEFEM) is combined with a discontinuous Galerkin (DG) formulation for the numerical solution of Euler equations of gas dynamics. With NEFEM, numerical fluxes along ...

    • Parametric solutions of turbulent incompressible flows in OpenFOAM via the proper generalised decomposition 

      Tsiolakis, Vasileios; Giacomini, Matteo; Sevilla Cárdenas, Rubén; Othmer, Carsten; Huerta, Antonio (Elsevier, 2022-01-15)
      Article
      Accés obert
      An a priori reduced order method based on the proper generalised decomposition (PGD) is proposed to compute parametric solutions involving turbulent incompressible flows of interest in an industrial context, using OpenFOAM. ...

    • Physics dependent de-featuring, is it a prerequisite for mesh generation? 

      Hassan, Oubay; Sevilla Cárdenas, Rubén (CIMNE, 2015)
      Text en actes de congrés
      Accés obert
      The use of numerical simulation as a design tool in engineering is nowadays routinely practiced. The initial stage of the simulation process is the generation of an appropriate mesh that is designed to capture ...

    • Separated response surfaces for flows in parametrised domains: comparison of a priori and a posteriori PGD algorithms 

      Giacomini, Matteo; Borchini, Luca; Sevilla Cárdenas, Rubén; Huerta, Antonio (2021-11-15)
      Article
      Accés obert
      Reduced order models (ROM) are commonly employed to solve parametric problems and to devise inexpensive response surfaces to evaluate quantities of interest in real-time. There are many families of ROMs in the literature ...

    • Solution of geometrically parametrised problems within a CAD environment via model order reduction 

      Sevilla Cárdenas, Rubén; Zlotnik, Sergio; Huerta, Antonio (2020-01-01)
      Article
      Accés obert
      The main objective of this work is to describe a general and original approach for computing an off-line solution for a set of parameters describing the geometry of the domain. That is, a solution able to include information ...