Now showing items 1-20 of 44

  • A compressible Lagrangian framework for the simulation of underwater implosion problems 

    Kamran, Kazem; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Rossi, Riccardo (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
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    The development of efficient algorithms to understand implosion dynamics presents a number of challenges. The foremost challenge is to efficiently represent the coupled compressible fluid dynamics of internal air and ...
  • A finite point method for adaptive-three-dimensional compressible flow calculations 

    Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo (2009-07-30)
    Article
    Open Access
    The finite point method (FPM) is a meshless technique, which is based on both, a weighted least-squares numerical approximation on local clouds of points and a collocation technique which allows obtaining the discrete ...
  • A general stabilized formulation for incompressible fluid flow using finite calculus and the finite element method 

    Oñate Ibáñez de Navarra, Eugenio; García Espinosa, Julio; Bugeda Castelltort, Gabriel; Idelsohn Barg, Sergio Rodolfo (CIMNE, 2003-11)
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    We present a general formulation for incompressible fluid flow analysis using the finite element method (FEM). The necessary stabilization for dealing with convective effects and the incompressibility condition are introduced ...
  • A meshless finite point method for the three-dimensional analysis of compressible flow problems involving moving boundaries and adaptivity 

    Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Flores Le Roux, Roberto Maurice (2013-10-10)
    Article
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    A finite point method for solving compressible flow problems involving moving boundaries and adaptivity is presented. The numerical methodology is based on an upwind-biased discretization of the Euler equations, written ...
  • A portable OpenCL-based unstructured edge-based Finite Element Navier-Stokes solver on graphics hardware 

    Rossi, Riccardo; Mossaiby, Farshid; Idelsohn Barg, Sergio Rodolfo (Elsevier, 2013-07)
    Article
    Open Access
    The rise of GPUs in modern high-performance systems increases the interest in porting portion of codes to such hardware. The current paper aims to explore the performance of a portable state-of-the-art FE solver on GPU ...
  • 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 (2014-05-23)
    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 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
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    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 ...
  • Advances in the particle finite element method (PFEM) for solving coupled problems in engineering 

    Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Celigueta Jordana, Miguel Ángel; Rossi, Riccardo; Marti, J.; Carbonell Puigbó, Josep Maria; Ryzhakov, Pavel; Suárez Arroyo, Benjamín (Springer, 2011)
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    We present some developments in the formulation of the Particle Finite Element Method (PFEM) for analysis of complex coupled problems on fluid and solid mechanics in engineering accounting for fluid-structure interaction ...
  • Advances in the simulation of multi-fluid flows with the particle finite element method. Application to bubble dynamics 

    Mier Torrecilla, Mónica de; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2010)
    Article
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    In this work, we extend the Particle Finite Element Method (PFEM) to multi-fluid flow problems with the aim of exploiting the fact that Lagrangian methods are specially well suited for tracking interfaces. We develop a ...
  • Aplicación de los métodos {alfa} de integración temporal al problema de transmisión del calor con cambio de fase 

    Crivelli, Luis; Storti, Mario; Idelsohn Barg, Sergio Rodolfo (Centro Internacional de Métodos Numéricos en Ingeniería, 1991)
    Article
    Open Access
    En trabajos recientes se han propuesto un método de dominio fijo y sin paramétros de regularización para tratar el problema de transmisión del calor con cambio de fase. En este trabajo se estudia la aplicación de la familia ...
  • 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 (2014-04-10)
    Article
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    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 ...
  • 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)
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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)
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    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)
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    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 ...
  • 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
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    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)
    Article
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    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)
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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.