Ara es mostren els items 62-81 de 220

    • Challenges for time and frequency domain aeroacoustic solvers 

      Angeloski, Aleksandar; Discacciati, Marco; Legendre, César; Lielens, Gregori; Huerta, Antonio (2014)
      Text en actes de congrés
      Accés obert
      The linearized Euler equations (LEE) model acoustic propagation in the presence of rotational mean flows. They can be solved in time [1–3] or in frequency [4–6] domain, with both approaches having advantages and disadvantages. ...
    • Comparing two algorithms to add large strains to small-strain FE code 

      Rodríguez Ferran, Antonio; Huerta, Antonio (1998-09)
      Article
      Accés obert
      Two algorithms for the stress update (i.e., time integration of the constitutive equation) in large-strain solid mechanics are discussed, with particular emphasis on two issues: (1) The incremental objectivity; and (2) ...
    • 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 ...
    • Computable exact bounds for linear outputs from stabilized solutions of the advection-diffusion-reaction equation 

      Parés Mariné, Núria; Díez, Pedro; Huerta, Antonio (John Wiley & Sons, 2013-02-01)
      Article
      Accés obert
    • Computation of bounds for anchor problems in limit analysis and decomposition techniques 

      Muñoz Romero, José; Rabiei, Syednima; Lyamin, Andrei; Huerta, Antonio (Springer, 2013-07-15)
      Capítol de llibre
      Accés obert
      Numerical techniques for the computation of strict bounds in limit analyses have been developed for more than thirty years. The efficiency of these techniques have been substantially improved in the last ten years, and ...
    • Computational limit analysis for anchors and retaining walls 

      Muñoz Romero, José; Lyamin, Andrei V.; Huerta, Antonio (Universitat Politècnica de Catalunya. Escola Tècnica Superior de Camins Canals i Ports de Barcelona, 2011-11-15)
      Comunicació de congrés
      Accés obert
      The computation of the bearing capacity of engineering structures commonly relays on results obtained for simple academic examples. Recent developments in computational limit analysis have allowed engineers to compute ...
    • Computational vademecums for a fast and reliable simulation of RTM processes 

      Abisset Chavanne, Emmanuelle; Cueto Prendes, Elias; Huerta, Antonio; Chinesta, Francisco (Universidad de Sevilla. Grupo de Elasticidad y Resistencia de Materiales, 2014)
      Text en actes de congrés
      Accés obert
      Proper Generalized Decomposition methods allow to obtain an efficient solution for multi-parametric problems without the need for simulating numerous problems to obtain a response surface. Instead, PGD obtains a priori a ...
    • 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
      Accés obert
      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 ...
    • Consistent tangent matrices for density-dependent finite plasticity models 

      Pérez Foguet, Agustí; Rodríguez Ferran, Antonio; Huerta, Antonio (2001-09)
      Article
      Accés obert
      The consistent tangent matrix for density-dependent plastic models within the theory of isotropic multiplicative hyperelastoplasticity is presented here. Plastic equations expressed as general functions of the Kirchhoff ...
    • Consistent tangent matrices for substepping schemes 

      Pérez Foguet, Agustí; Rodríguez Ferran, Antonio; Huerta, Antonio (1999-09)
      Report de recerca
      Accés obert
      A very simple and general expression of the consistent tangent matrix for substep- ping time-integration schemes is presented. If needed, the derivatives required for the computation of the consistent tangent moduli can ...
    • Consistent tangent matrices for substepping schemes 

      Pérez Foguet, Agustí; Rodríguez Ferran, Antonio; Huerta, Antonio (2001-06)
      Article
      Accés obert
      A very simple and general expression of the consistent tangent matrix for substepping time-integration schemes is presented. If needed, the derivatives required for the computation of the consistent tangent moduli can be ...
    • Continuous blending of SPH with finite elements 

      Fernández Méndez, Sonia; Bonet, J; Huerta, Antonio (2005-06)
      Article
      Accés obert
      This paper proposes a methodology for the continuous blending of the finite element method and smooth particle hydrodynamics. The coupled approximation with finite elements and particles, and the discretization of the ...
    • Convergence of finite elements enriched with meshless methods 

      Fernández Méndez, Sonia; Díez, Pedro; Huerta, Antonio (2003-11)
      Article
      Accés obert
      A combined hierarchical approximation based on finite elements and mesh-less methods is proposed and studied. Finite Elements are enriched adding hierarchical shape functions based on a particle distribution. Convergence ...
    • Coupling finite elements and particles for adaptivity: an application to consistently stabilized convection–diffusion 

      Fernández Méndez, Sonia; Huerta, Antonio (2002)
      Article
      Accés obert
      A mixed approximation coupling finite elements and mesh-less methods is presented. It allows selective refinement of the finite element solution without remeshing cost. The distribution of particles can be arbitrary. ...
    • Decomposition techniques in computational limit analysis 

      Muñoz Romero, José; Rabiei, Syednima; Huerta, Antonio (2013)
      Comunicació de congrés
      Accés obert
      Numerical techniques for the computation of strict bounds in limit analyses have been developed for more than thirty years. The efficiency of these techniques have been substantially improved in the last ten years, and ...
    • Deim-based pgd for multi-parametric nonlinear model reduction 

      Aguado, Jose V.; Chinesta, Francisco; Leygue, Adrien; Cueto, Elías; Huerta, Antonio (CIMNE, 2013)
      Text en actes de congrés
      Accés obert
      A new technique for efficiently solving parametric nonlinear reduced order models in the Proper Generalized Decomposition (PGD) framework is presented here. This technique is based on the Discrete Empirical Interpolation ...
    • Deim-based PGD for parametric nonlinear model order reduction 

      Aguado, José V.; Chinesta, Francisco; Leygue, Adrien; Cueto Prendes, Elias; Huerta, Antonio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
      Text en actes de congrés
      Accés obert
      This book contains the Abstracts of the papers presented at ADMOS 2013, the sixth International Conference on Adaptive Modeling and Simulation, held in Lisbon from June 3 to 5, 2013. Numerical Modeling and Simulation ...
    • Desenvolupament d’un simulador numèric del procés de compostatge i aplicació a l’optimització del compostatge de llots i mescles amb altres residuos orgànics 

      Sánchez, Antoni; Gea, Teresa; Baeza, Juan; Ruggieri, Luz; Puyuelo, Belén; Domínguez, Jorge; Pérez, Domingo; Cereijo, David; Mato, Salustiano; Solé-Mauri, Francina; Illa, Josep; Flotats Ripoll, Xavier; Prenafeta Boldú, Francesc Xavier; Vázquez, Felicitas; Magrí Aloy, Albert; Pérez Foguet, Agustí; Huerta, Antonio; Roca, Xavier; Oliver, Albert (Agència Catalana de l'Aigua, 2007)
      Text en actes de congrés
      Accés obert
      L’objectiu principal del present projecte és l’obtenció d’un simulador, basat en un model estructurat, que permeti optimitzar les condicions del procés de compostatge de llots de depuradora, així com predir-ne ...
    • Dimensionless analysis of HSDM and application to simulation of breakthrough curves of highly adsorbent porous media 

      Pérez Foguet, Agustí; Casoni Rero, Eva; Huerta, Antonio (2013-05)
      Article
      Accés obert
      The homogeneous surface diffusion model (HSDM) is widely used for adsorption modeling of aqueous solutions. The Biot number is usually used to characterize model behavior. However, some limitations of this characterization ...
    • 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
      Accés obert
      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 ...