Now showing items 1-20 of 115

    • 3D nurbs-enhanced finite element method 

      Sevilla Cárdenas, Rubén; Fernández Méndez, Sonia; Huerta, Antonio (2009-06-08T10:12:04Z)
      Conference report
      Open Access
      An improvement of the classical finite element method is proposed in [1], the NURBS-Enhanced Finite Element Method (NEFEM). It is able to exactly represent the geometry by means of the usual CAD description of the boundary ...
    • A boundary control technique to the string-tip-mass system based on a non-symmetric peak-detector model 

      Acho Zuppa, Leonardo; Pujol Vázquez, Gisela (2017)
      Conference report
      Restricted access - publisher's policy
      This paper presents a vibration control design to the string-tip-mass system by using a non-symmetric peakdetector mechanism. Previously, this peak-detector system was used as an easy algorithm to mitigate vibration on ...
    • A comparison of refinement indicators for h-adaptive discontinuous Galerkin methods for the Euler and Navier-Stokes equations 

      Matas Salvá, Antonio (Universitat Politècnica de Catalunya, 2018-09-17)
      Master thesis
      Restricted access - confidentiality agreement
    • A conserved phase-field system based on the Maxwell–Cattaneo law 

      Miranville, Alain; Quintanilla de Latorre, Ramón (2013-06-01)
      Article
      Restricted access - publisher's policy
      Our aim in this paper is to study a generalization of the conserved Caginalp phasefield system based on the Maxwell–Cattaneo law for heat conduction and endowed with Neumann boundary conditions. In particular, we obtain ...
    • 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 ...
    • A critical comparison of two discontinuous galerkin methods for the navier-stokes equations using solenoidal aproximations 

      Villardi de Montlaur, Adeline de; Peraire Guitart, Jaume; Huerta, Antonio (2009-06-08T07:49:26Z)
      Conference report
      Open Access
      This paper compares two methods to solve incompressible problems, in particular the Navier-Stokes equations, using a discontinuous polynomial interpolation that is exactly divergence-free in each element. The first method ...
    • A discontinuous galerkin formulation for solid dynamics 

      Peraire Guitart, Jaume; Bonet Carbonell, Javier; Huerta, Antonio; Persson, Per Olof; Vidal Seguí, Yolanda (Omnipress, 2006)
      Lecture
      Open Access
    • A discrete bernoulli free boundary problem 

      González Nogueras, María del Mar; Gualdani, Maria; Shagholian, Henrick (2012-04)
      Research report
      Open Access
      We consider a free boundary problem for the p-Laplace operator which is related to the so-called Bernoulli free boundary problem. In this formulation, the classical boundary gradient condition is replaced by a condition ...
    • A gradient estimate for nonlocal minimal graphs 

      Cabré Vilagut, Xavier; Cozzi, Matteo (2019-04-01)
      Article
      Open Access
      We consider the class of measurable functions defined in all of Rn that give rise to a nonlocal minimal graph over a ball of Rn. We establish that the gradient of any such function is bounded in the interior of the ball ...
    • A PDE approach of inflammatory phase dynamics in diabetic wounds. 

      Consul Porras, M. Nieves; Oliva, Sergio M.; Pellicer, Marta (2014)
      Article
      Open Access
      The objective of the present paper is the modeling and analysis of the dynamics of macrophages and certain growth factors in the in ammatory phase, the rst one of the wound healing process. It is the phase where there ...
    • A Perturbation argument for a Monge–Ampère type equation arising in optimal transportation 

      Caffarelli, Luis; González Nogueras, María del Mar; Nguyen, Truyen (2014-05-01)
      Article
      Restricted access - publisher's policy
      We prove some interior regularity results for potential functions of optimal transportation problems with power costs. The main point is that our problem is equivalent to a new optimal transportation problem whose cost ...
    • A singular initial value problem to construct density-equalizing maps 

      Avinyó Andrés, Albert; Solà-Morales Rubió, Joan de; València Guitart, Marta (2011-12)
      Article
      Restricted access - publisher's policy
      The diffusion-based algorithm to produce density-equalizing maps interprets diffusion as an advection process. This algorithm uses the dynamics of a flow that is defined by an initial value problem that turns out to be ...
    • Acoplamiento del modelo regional de calidad de aire (CMAQ) con el modelo de emisiones locales mediante elementos finitos 

      Pérez Foguet, Agustí; Oliver Serra, Albert (2009-06-08T09:47:57Z)
      Conference report
      Open Access
      Existen modelos regionales de calidad del aire que son muy utilizados. Estos modelos tienen modelos para estudiar el aporte de contaminantes provocados por fuentes importantes de contaminación, como pueden ser chimeneas, ...
    • Action-angle variables and a KAM theorem for b-Poisson manifolds 

      Kiesenhofer, Anna; Miranda Galcerán, Eva; Scott, Geoffrey (2015-02)
      Research report
      Open Access
      In this article we prove an action-angle theorem for b-integrable systems on b-Poisson manifolds improving the action-angle theorem contained in [LMV11] for general Poisson manifolds in this setting. As an application, we ...
    • Adjoint-based PDE-constrained optimization using HPC techniques 

      Peredo Andrade, Oscar Francisco (Universitat Politècnica de Catalunya, 2013-10-02)
      Master thesis
      Open Access
      This work focuses in the utilization of current HPC technologies to explore mathematical optimization algorithms in which a PDE acts as main constraint. A development framework is proposed, together with a novel application ...
    • An example on Lyapunov stability and linearization 

      Munhoz Rodrigues, Hildebrando; Solà-Morales Rubió, Joan de (2020-01-01)
      Article
      Open Access
      The purpose of this paper is to present an example of a (in the Fréchet sense) discrete dynamical system in a infinite-dimensional separable Hilbert space for which the origin is an exponentially asymptotically stable ...
    • An improved harmonic load flow formulation 

      Rashid, Asim; Mesas García, Juan José; Sainz Sapera, Luis (Taylor & Francis, 2019-10-21)
      Article
      Open Access
      The paper contributes an improved harmonic load flow formulation with fewer convergence problems but the same accurate results as traditional formulations. The proposed formulation approaches the harmonic load flow problem ...
    • Analysis for the strain gradient theory of porous thermoelasticity 

      Fernández, José Ramón; Magaña Nieto, Antonio; Masid, Maria; Quintanilla de Latorre, Ramón (2019-01-01)
      Article
      Open Access
      In this paper, we analyse a model involving a strain gradient thermoelastic rod with voids. Existence and uniqueness, as well as an energy decay property, are proved by means of the semigroup arguments. The variational ...
    • Analyticity in porous-thermoelasticity with microtemperatures 

      Pamplona, Paulo Xavier; Muñoz Rivera, Jaime E.; Quintanilla de Latorre, Ramón (2012-10-15)
      Article
      Restricted access - publisher's policy
      In this note we study the analyticity of the solutions to the one-dimensional porouselasticity problem with temperatures and microtemperatures when viscoelasticity and porous viscosity effects are also present. We show ...
    • Antisymmetry of solutions for some weighted elliptic problems 

      Cabré Vilagut, Xavier; Lucia, Marcello; Sanchón, Manel; Villegas, Salvador (2018-03-17)
      Article
      Open Access
      This article concerns the antisymmetry, uniqueness, and monotonicity properties of solutions to some elliptic functionals involving weights and a double well potential. In the one-dimensional case, we introduce the continuous ...