Now showing items 21-40 of 72

  • A-posteriori error estimation for the finite point method with applications to compressible flow 

    Ortega, Enrique; Flores Le Roux, Roberto Maurice; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo (2017-04)
    Article
    Open Access
    An a-posteriori error estimate with application to inviscid compressible flow problems is presented. The estimate is a surrogate measure of the discretization error, obtained from an approximation to the truncation terms ...
  • Application of the finite point method to high- Reynolds number compressible flow problems 

    Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Flores Le Roux, Roberto Maurice (2014-04)
    Article
    Restricted access - publisher's policy
    In this work, the finite point method is applied to the solution of high-Reynolds compressible viscous flows. The aim is to explore this important field of applications focusing on two main aspects: the easiness and ...
  • A reduced-order model based on the coupled 1D-3D finite element simulations for an efficient analysis of hemodynamics problems 

    Soudah Prieto, Eduardo; Rossi, Riccardo; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2014-05)
    Article
    Open Access
    A reduced-order model for an efficient analysis of cardiovascular hemodynamics problems using multiscale approach is presented in this work. Starting from a patient-specific computational mesh obtained by medical imaging ...
  • A semi-analytical model for droplet dynamics on the GDL surface of a PEFC electrode 

    Jarauta Arabí, Alexandre; Secanell, Marc; Pons Prats, Jordi; Ryzhakov, Pavel; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2015-04)
    Article
    Open Access
    Water management is one of the key factors in Proton Exchange Fuel Cell (PEFC) performance. The water produced within the fuel cell is evacuated through the gas channels, but at high current densities water can block the ...
  • A unified monolithic approach for multi-fluid flows and fluid-structure interaction using the Particle Finite Element Method with fixed mesh 

    Becker, Pablo Agustín; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2015-06)
    Article
    Open Access
    This paper describes a strategy to solve multi-fluid and fluid-structure interaction (FSI) problems using Lagrangian particles combined with a fixed finite element (FE) mesh. Our approach is an extension of the fluid-only ...
  • Avoiding instabilities caused by added mass effects in fluid-structure interaction problems 

    Idelsohn Barg, Sergio Rodolfo; Pin, Facundo del; Rossi, Riccardo (John Wiley & Sons, 2010)
    Part of book or chapter of book
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    The main goal of this paper is to present a new strategy to avoid the unstable behavior caused by added mass effects in approaches the involve pressure segregation or staggered techniques in incompressible flows. We will ...
  • CFD presenta compresible + incompresible un matrimonio por conveniencia 

    Storti, Mario; Nigro, Norberto; Idelsohn Barg, Sergio Rodolfo (Centro Internacional de Métodos Numéricos en Ingeniería, 1997)
    Article
    Open Access
    Este trabajo presenta por un lado una breve síntesis de algunas importantes contribuciones dirigida a la unificación de códigos computacionales para flujos tanto compresible como incompresible y por otro un eficiente ...
  • Comparative accuracy and performance assessment of the finite point method in compressible flow problems 

    Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Flores Le Roux, Roberto Maurice (Elsevier, 2014-01-20)
    Article
    Restricted access - publisher's policy
    A comparative assessment of the Finite Point Method (FPM) is presented. Using a wing-fuselage configuration under transonic inviscid flow conditions as reference test case, the performance of the FPM flow solver is compared ...
  • Condición absorbente discreta no-locaL (DNL) en elementos finitos para modelos de propagación de ondas en el mar 

    Bonet Chaple, Ruberto Pedro; Nigro, Norberto; Storti, Mario; Idelsohn Barg, Sergio Rodolfo (Universitat Politècnica de Catalunya, 1999)
    Article
    Open Access
    El método de elementos finitos de Galerkin es empleado para obtener soluciones aproximadas de problemas de radiación y dispersión de ondas modeladas por la ecuación de Berkhoff en dominios no acotados. En este trabajo se ...
  • Development and applications of the finite point method to compressible aerodynamics problems 

    Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
    Book
    Restricted access - publisher's policy
    En este trabajo se aborda el desarrollo del Método de Puntos Finitos (MPF) y su aplicación a problemas de aerodinámica de flujos compresibles. El objetivo principal es investigar el potencial de la técnica sin malla para ...
  • El método de partículas y elementos finitos: aplicaciones en ingenieria de puertos 

    Oñate Ibáñez de Navarra, Eugenio; Celigueta Jordana, Miguel Ángel; Idelsohn Barg, Sergio Rodolfo; Del Pin, F. (2005-12)
    External research report
    Open Access
  • Estrategias para acelerar la convergencia del método DNL 

    Bonet Chaple, Ruberto Pedro; Nigro, Norberto; Storti, Mario; Idelsohn Barg, Sergio Rodolfo (Universitat Politènica de Catalunya, 2000)
    Article
    Open Access
    La condición de frontera DNL circular es una condición absorbente usada para el cálculo de ondas exteriores. Dos técnicas numéricas son introducidas para acelerar la convergencia del método DNL circular mediante el empleo ...
  • Finite point method to solve shallow water equations 

    Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Buachart, Chinapat (John Wiley & Sons, 2011-10)
    Article
    Restricted access - publisher's policy
    An adaptive Finite Point Method (FPM) for solving shallow water problems is presented. The numerical methodology we propose, which is based on weighted-least squares approximations on clouds of points, adopts an upwind-biased ...
  • Flow behaviour of negatively buoyant jets in immiscible ambient fluid 

    Geyer Traver, Adelina; Phillips, Jeremy C.; Mier Torrecilla, Mónica de; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2012-01)
    Article
    Restricted access - publisher's policy
    In this paper we investigate experimentally the injection of a negatively buoyant jet into a homogenous immiscible ambient fluid. Experiments are carried out by injecting a jet of dyed fresh water through a nozzle in the ...
  • Fluid-soil-structure interaction analysis with the particle finite element method 

    Oñate Ibáñez de Navarra, Eugenio; Celigueta Jordana, Miguel Ángel; Idelsohn Barg, Sergio Rodolfo; Salazar González, Fernando; Suárez Arroyo, Benjamín (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2012)
    Part of book or chapter of book
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    We present some developments and applications of the Particle Finite Element Method (PFEM) for analysis of complex coupled problems in mechanics involving fluid-soil-structure interaction.
  • Fluid-structure interaction problems with strong added-mass effect 

    Idelsohn Barg, Sergio Rodolfo; Pin, Facundo del; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2009-12)
    Article
    Restricted access - publisher's policy
    In this paper, the so-called added-mass effect is investigated from a different point of view of previous publications. The monolithic fluid–structure problem is partitioned using a static condensation of the velocity ...
  • Forma simétrica de la condición de contorno absorbente DNL para el problema de la resistencia de ola en barcos 

    Elía, Jorge D'; Storti, Mario; Idelsohn Barg, Sergio Rodolfo (2009-05-28T15:29:04Z)
    Article
    Open Access
    En la ref.' hemos presentado un esquema numérico basado en elementos finitos centrados con condición de contorno absorbente (la cual llamamos DNL, por Discrete Yon-Local) para el problema de la resistencia de ola en barcos. ...
  • Una formulación Petrov-Galerkin para la ecuación de reacción-advección-difusión 

    Nigro, Norberto; Storti, Mario; Idelsohn Barg, Sergio Rodolfo (Centro Internacional de Métodos Numéricos en Ingeniería, 1995)
    Article
    Open Access
    Presentamos un esquema de discretización basado en la formulación Petrov-Galerkin para, problemas de reacción-advección-difusión. El esquema presentado exhibe superconvergencia, (valores exactos en los nodos) para una ...
  • Interaction between an elastic structure and free-surface flows: experimental versus numerical comparisons using the PFEM 

    Idelsohn Barg, Sergio Rodolfo; Marti, J.; Souto Iglesias, Antonio; Oñate Ibáñez de Navarra, Eugenio (2008-12)
    Article
    Open Access
    The paper aims to introduce new fluid–structure interaction (FSI) tests to compare experimental results with numerical ones. The examples have been chosen for a particular case for which experimental results are not much ...
  • Lagrangian versus Eulerian integration errors 

    Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio; Nigro, Norberto; Becker, Pablo Agustín; Gimenez, Juan Marcelo (2015-08)
    Article
    Open Access
    The possibility to use a Lagrangian frame to solve problems with large time-steps was successfully explored previously by the authors for the solution of homogeneous incompressible fluids and also for solving multi-fluid ...