• Mixed stabilized finite element methods in linear elasticity for the velocity–stress equations in the time and the frequency domains 

  Fabra Ruiz, Arnau; Codina, Ramon (2023-02)
  Article
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  In this work we present stabilized finite element methods for the mixed velocity–stress elasticity equations and for its irreducible velocity form. This is done both for the time and frequency domains, the latter being ...
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  A multi-criteria h-adaptive finite-element framework for industrial part-scale thermal analysis in additive manufacturing processes 

  Filho, Carlos Augusto Moreira; Caicedo Silva, Manuel Alejandro; Cervera Ruiz, Miguel; Chiumenti, Michele; Baiges Aznar, Joan (2022-12)
  Article
  Open Access

  This work presents an h-adaptive finite-element (FE) strategy to address the numerical simulation of additive manufacturing (AM) of large-scale parts. The wire-arc additive manufacturing is chosen as the demonstrative ...
• Finite element approximation of wave problems with correcting terms based on training artificial neural networks with fine solutions 

  Fabra Ruiz, Arnau; Baiges Aznar, Joan; Codina, Ramon (2022-09)
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  In this paper we present a general idea to correct coarse models by introducing a correcting term designed from fine solutions that can be then applied to situations in which a fine solution is not available. We apply this ...
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  On the use of ensemble averaging techniques to accelerate the Uncertainty Quantification of CFD predictions in wind engineering 

  Tosi, Riccardo; Núñez Corbacho, Marc; Pons Prats, Jordi; Principe, Ricardo Javier; Rossi, Riccardo (2022-09)
  Article
  Open Access

  In this work we focus on reducing the wall clock time required to compute statistical estimators of highly chaotic incompressible flows on high performance computing systems. Our approach consists of replacing a single ...
• A VMS–based fractional step technique for the compressible Navier–Stokes equations using conservative variables 

  Parada Bustelo, Samuel; Codina, Ramon; Baiges Aznar, Joan (2022-06)
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  In this paper we address the compressible Navier–Stokes equations written in the so-called conservative formulation. In particular, we focus on the possibility of uncoupling the computation of the problem unknowns, namely, ...
• Modal analysis of elastic vibrations of incompressible materials using a pressure-stabilized finite element method 

  Codina, Ramon; Türk, Önder (2022-09)
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  This paper describes a modal analysis technique to approximate the vibrations of incompressible elastic solids using a stabilized finite element method to approximate the associated eigenvalue problem. It is explained why ...
• Geometrical discretisations for unfitted finite elements on explicit boundary representations 

  Badia, Santiago; Martorell Pol, Pere Antoni; Verdugo Rojano, Francesc (2022-07-01)
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  Unfitted (also known as embedded or immersed) finite element approximations of partial differential equations are very attractive because they have much lower geometrical requirements than standard body-fitted formulations. ...
• Topological derivative-based topology optimization of incompressible structures using mixed formulations 

  Castañar Pérez, Inocencio; Baiges Aznar, Joan; Codina, Ramon; Venghaus, Henning (2022-02)
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  In this work an algorithm for topological optimization, based on the topological derivative concept, is proposed for both nearly and fully incompressible materials. In order to deal with such materials, a new decomposition ...
• Performance analysis of a damage tolerant composite self-deployable elastic-hinge 

  Fernandes, P.; Pinto, R.; Ferrer Ferré, Àlex; Correia, N. (2022-05-15)
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  Self-deployable composite structures are interesting for the space industry as they efficiently use the space available, are lightweight, and have simple deployment systems. Usually, the design of these structures balances ...
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  An embedded approach for the solution of the full potential equation with finite elements 

  Núñez Corbacho, Marc; Lopez, Iñigo; Baiges Aznar, Joan; Rossi, Riccardo (2022-01)
  Article
  Open Access

  Recent developments in numerical simulations in the aerodynamics field are focused on reducing the computational cost of the solvers, targeting their use at the initial design steps. Under the right assumptions, potential ...
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  A consistent approximation of the total perimeter functional for topology optimization algorithms 

  Amstutz, Samuel; Dapogny, Charles; Ferrer Ferré, Àlex (2022-02-24)
  Article
  Open Access

  This article revolves around the total perimeter functional, one particular version of the perimeter of a shape O contained in a fixed computational domain D measuring the total area of its boundary ¿O, as opposed to its ...
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  Inverse homogenization using the topological derivative 

  Ferrer Ferré, Àlex; Giusti, Sebastian Miguel (2021-09-28)
  Article
  Open Access

  Purpose: The purpose of this study is to solve the inverse homogenization problem, or so-called material design problem, using the topological derivative concept. Design/methodology/approach : The optimal topology is ...

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