Ara es mostren els items 76-95 de 220

    • 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 ...
    • Discontinuous Galerkin methods for the Stokes equations using divergence-free approximations 

      Villardi de Montlaur, Adeline de; Fernández Méndez, Sonia; Huerta, Antonio (2008-07)
      Article
      Accés obert
      A discontinuous Galerkin (DG) method with solenoidal approximation for the simulation of incompressible flow is proposed. It is applied to the solution of the Stokes equations. The interior penalty method is employed to ...
    • Discretization influence on regularization by two localization limiters 

      Huerta, Antonio; Pijaudier-Cabot, Gilles (1994-06)
      Article
      Accés obert
      In materials with a strain-softening characteristic behavior, classical continuum mechanics favors uncontrolled strain localization in numerical analyses. Several methods have been proposed to regularize the problem. Two ...
    • Distortions in large aluminum forgings: current situation and simulation challenges 

      Mena, Ramiro; Guinard, S.; Aguado, José Vicente; Huerta, Antonio (Springer, 2020-02-28)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Distortions after machining of large aluminum forgings are a recurrent problem for the aeronautical industry. These deviations from design geometry are caused by the presence of residual stresses, which are developed along ...
    • Effect of the separated approximation of input data in the accuracy of the resulting PGD solution 

      Zlotnik, Sergio; Díez, Pedro; Huerta, Antonio (CIMNE, 2015)
      Text en actes de congrés
      Accés obert
      Separated representations are commonly used to avoid the so-called curse of dimensionality, that is, an exponential increase in the number of degrees of freedom with the number of dimensions. In order to use separated ...
    • Effect of the separated approximation of input data in the accuracy of the resulting PGD solution 

      Zlotnik, Sergio; Díez, Pedro; González, David; Huerta, Antonio (Springer, 2015-11-25)
      Article
      Accés obert
      The Proper Generalized Decomposition (PGD) requires separability of the input data (e.g. physical properties, source term, boundary conditions, initial state). In many cases the input data is not expressed in a separated ...
    • Efficiency and accuracy of high-order computations and reduced order modelling in coastal engineering wave propagation problems 

      Modesto Galende, David; Giorgiani, Giorgio; Zlotnik, Sergio; Huerta, Antonio (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Several numerical issues have to be considered when solving wave propagation problems, between which there are the artificial boundary conditions, the small geometrical features that can be influential or the variable ...
    • Efficiency of high-order elements for continuous and discontinuous Galerkin methods 

      Huerta, Antonio; Angeloski, Aleksandar; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume (John Wiley & sons, 2013-11)
      Article
      Accés obert
      To evaluate the computational performance of high-order elements, a comparison based on operation count is proposed instead of runtime comparisons. More specifically, linear versus high-order approximations are analyzed ...
    • Efficient and accurate approach for powder compaction problems 

      Pérez Foguet, Agustí; Rodríguez Ferran, Antonio; Huerta, Antonio (2003-02)
      Article
      Accés obert
      In this paper, a new approach for powder cold compaction simulations is presented. A density-dependent plastic model within the framework of finite strain multiplicative hyperelastoplasticity is used to describe the highly ...
    • Efficient and reliable nonlocal damage models 

      Rodríguez Ferran, Antonio; Morata Ruano, Irene; Huerta, Antonio (2004-07)
      Article
      Accés obert
      We present an efficient and reliable approach for the numerical modelling of failure with nonlocal damage models. The two major numerical challenges––the strongly nonlinear, highly localized and parameter-dependent structural ...
    • Efficient unstructured quadrilateral mesh generation 

      Sarrate Ramos, Josep; Huerta, Antonio (Wiley and Sons, 2000-09)
      Article
      Accés obert
      This work is devoted to the description of an algorithm for automatic quadrilateral mesh generation. The technique is based on a recursive decomposition of the domain into quadrilateral elements. This automatically generates ...
    • Elliptic harbor wave model with perfectly matched layer and exterior bathymetry effects 

      Modesto Galende, David; Fernández Méndez, Sonia; Huerta, Antonio (2016-09)
      Article
      Accés obert
      Standard strategies for dealing with the Sommerfeld condition in elliptic mild-slope models require strong assumptions on the wave field in the region exterior to the computational domain. More precisely, constant bathymetry ...
    • Encapsulated PGD algebraic toolbox operating with high-dimensional data 

      Díez, Pedro; Zlotnik, Sergio; García González, Alberto; Huerta, Antonio (2019-11-28)
      Article
      Accés obert
      In its original conception, proper generalized decomposition (PGD) provides explicit parametric solutions, denoted as computational vademecums or digital abacuses, to parametric boundary value problems. The PGD approach ...
    • Enrichissement des interpolations d'elements finis en utilisant des méthodes de particules 

      Huerta, Antonio; Fernández Méndez, Sonia; Díez, Pedro (2002-11)
      Article
      Accés obert
      In the framework of meshless methods the interpolation is based on a distribution of particles : it is not necessary to define connectivities. In this methods the interpolation can be easily enriched, increasing the number ...
    • Enrichment and coupling of the finite element and meshless methods 

      Huerta, Antonio; Fernández Méndez, Sonia (Wiley and Sons, 2000-09)
      Article
      Accés obert
      A mixed hierarchical approximation based on finite elements and meshless methods is presented. Two cases are considered. The first one couples regions where finite elements or meshless methods are used to interpolate: ...