• 

  Reduced order models for thermally coupled low Mach flows 

  Reyes Sotomayor, Ricardo; Codina, Ramon; Baiges Aznar, Joan; Idelsohn Barg, Sergio Rodolfo (Springer, 2018-12)
  Article
  Accés obert

  In this paper we present a collection of techniques used to formulate a projection-based reduced order model (ROM) for zero Mach limit thermally coupled Navier–Stokes equations. The formulation derives from a standard ...
• A dynamic spring element model for the prediction of longitudinal failure of polymer composites 

  Tavares, Rodrigo Paiva; Otero, Fermín; Baiges Aznar, Joan; Turon Travesa, Albert; Camanho, Pedro P. (2019-04)
  Article
  Accés restringit per política de l'editorial

  A spring element model that takes into account the dynamic effects associated with fibre failure in composite materials is presented. The model is implemented in a parallel environment to allow a better performance in the ...
• Computational aeroacoustics to identify sound sources in the generation of sibilant /s/ 

  Pont Ribas, Arnau; Guasch Fortuny, Oriol; Baiges Aznar, Joan; Codina, Ramon; van Hirtum, Annemie (John Wiley & sons, 2019-01)
  Article
  Accés restringit per política de l'editorial

  A sibilant fricative /s/ is generated when the turbulent jet in the narrow channel between the tongue blade and the hard palate is deflected downwards through the space between the upper and lower incisors and then impinges ...
• 

  Mixed aggregated finite element methods for the unfitted discretization of the Stokes problem 

  Badia, Santiago; Martín Huertas, Alberto Francisco; Verdugo Rojano, Francesc (2018-12-18)
  Article
  Accés obert

  In this work, we consider unfitted finite element methods for the numerical approximation of the Stokes problem. It is well-known that these kinds of methods lead to arbitrarily ill-conditioned systems and poorly approximated ...
• Simulation of high temperature superconductors and experimental validation 

  Olm Serra, Marc; Badia, Santiago; Martín Huertas, Alberto Francisco (2018-12)
  Article
  Accés restringit per política de l'editorial

  In this work, we present a parallel, fully-distributed finite element numerical framework to simulate the low-frequency electromagnetic behaviour of superconducting devices, which efficiently exploits high performance ...
• Physics-based balancing domain decomposition by constraints for multi-material problems 

  Badia, Santiago; Martín Huertas, Alberto Francisco; Nguyen, Hieu Trung (2018-11)
  Article
  Accés restringit per política de l'editorial

  In this work, we present a new variant of the balancing domain decomposition by constraints preconditioner that is robust for multi-material problems. We start with a well-balanced subdomain partition, and based on an ...
• Large-scale stochastic topology optimization using adaptive mesh refinement and coarsening through a two-level parallelization scheme 

  Baiges Aznar, Joan; Martínez Frutos, Jesús; Herrero Pérez, David; Otero, Fermín; Ferrer, Alex (2019-01)
  Article
  Accés restringit per política de l'editorial

  Abstract Topology optimization under uncertainty of large-scale continuum structures is a computational challenge due to the combination of large finite element models and uncertainty propagation methods. The former ...
• Balancing domain decomposition by constraints associated with subobjects 

  Badia, Santiago; Martín Huertas, Alberto Francisco; Nguyen, Hieu Trung (Elsevier, 2019-01)
  Article
  Accés restringit per política de l'editorial

  A simple variant of the BDDC preconditioner in which constraints are imposed on a selected set of subobjects (subdomain subedges, subfaces and vertices between pairs of subedges) is presented. We are able to show that the ...
• Variational multiscale error estimators for the adaptive mesh refinement of compressible flow simulations 

  Bayona Roa, Camilo Andrés; Codina, Ramon; Baiges Aznar, Joan (2018-08)
  Article
  Accés restringit per política de l'editorial

  This article investigates an explicit a-posteriori error estimator for the finite element approximation of the compressible Navier–Stokes equations. The proposed methodology employs the Variational Multi-Scale framework, ...
• 

  Approximation of the shallow water equations with higher order finite elements and variational multiscale methods 

  Villota Cadena, Ángel Patricio; Codina, Ramon (2018-01)
  Article
  Accés obert

  In this article, we present approximations with finite elements of high order using stabilized variational multiscale methods to approximate the equations of motion of a fluid in shallow waters. We write these equations ...
• Multi-objective design optimisation of stamping process for advanced high strength steels 

  Lee, Dong Seop; Pons Prats, Jordi; Espinoza Román, Héctor Gabriel; Fruitós Bickham, Óscar Alejandro; Oñate Ibáñez de Navarra, Eugenio (2012)
  Text en actes de congrés
  Accés restringit per política de l'editorial

  The paper investigates the multi-objective design optimisation of stamping process to control both the shape and quality of final Advanced High Strength Steels (AHSSs) in terms of springback and safety using Distributed ...
• 

  Driving mechanisms and streamwise homogeneity in molecular dynamics simulations of nanochannel flows 

  Bitrian Varea, Vicente; Principe, Ricardo Javier (2018-01-12)
  Article
  Accés obert

  In molecular dynamics simulations, nanochannel flows are usually driven by a constant force, that aims to represent a pressure difference between inlet and outlet, and periodic boundary conditions are applied in the ...

Mostra'n més