Now showing items 1-20 of 71

  • A 1D lumped-parameter/3D CFD approach for pressure drop in the aortic coarctation 

    Soudah Prieto, Eduardo; Bordoné, Maurizio; Dadvand, Pooyan; Rossi, Riccardo (Springer, 2012)
    Conference report
    Restricted access - publisher's policy
    Aortic Coarctation is a congenital constriction of the aorta that increases blood pressure above the constriction and hinders the flow below it. Based on a 3D surface mesh of a moderate thoracic coarctation, a high quality ...
  • A compressible Lagrangian framework for the simulation of the underwater implosion of large air bubbles 

    Kamran, Kamran; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo (2013-03)
    Article
    Restricted access - publisher's policy
    A fully Lagrangian compressible numerical framework for the simulation of underwater implosion of a large air bubble is presented. Both air and water are considered compressible and the equations for the Lagrangian shock ...
  • 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)
    Book
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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 contact algorithm for shell problems via Delaunay-based meshing of the contact domain 

    Kamran, Kamran; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2013-07)
    Article
    Restricted access - publisher's policy
    The simulation of the contact within shells, with all of its different facets, represents still an open challenge in Computational Mechanics. Despite the effort spent in the development of techniques for the simulation of ...
  • A coupled Eulerian-PFEM model for the simulation of overtopping in rockfill dams 

    Larese De Tetto, Antonia; Oñate Ibáñez de Navarra, Eugenio; Rossi, Riccardo (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2012)
    Book
    Open Access
  • A cut finite element method for the solution of the full-potential equation with an embedded wake 

    Davari, Masud; Rossi, Riccardo; Dadvand, Pooyan; Lopez, Iñigo; Wüchner, Roland (Springer, 2019-05)
    Article
    Restricted access - publisher's policy
    Potential flow solvers represent an appealing alternative for the simulation of non-viscous subsonic flows. In order to deliver accurate results, such techniques require prescribing explicitly the so called Kutta condition, ...
  • Adaptive and off-line techniques for non-linear multiscale analysis 

    Zaghi, Stefano; Martínez García, Javier; Rossi, Riccardo; Petracca, Massimo (2018-08-22)
    Article
    Open Access
    This paper presents two procedures, based on the numerical multiscale theory, developed to predict the mechanical non-linear response of composite materials under monotonically increasing loads. Such procedures are designed ...
  • Advanced solid elements for sheet metal forming simulation 

    Mataix, Vicente; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio; Flores, Fernando G (Institute of Physics (IOP), 2016)
    Conference report
    Open Access
    The solid-shells are an attractive kind of element for the simulation of forming processes, due to the fact that any kind of generic 3D constitutive law can be employed without any additional hypothesis. The present work ...
  • 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)
    Part of book or chapter of book
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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 ...
  • A fast and accurate method to solve the incompressible Navier-Stokes equations 

    Idelsohn Barg, Sergio Rodolfo; Nigro, Norberto; Gimenez, Juan; Rossi, Riccardo; Martí, Julio Marcelo (2013-02)
    Article
    Restricted access - publisher's policy
    Purpose: The purpose of this paper is to highlight the possibilities of a novel Lagrangian formulation in dealing with the solution of the incompressible Navier-Stokes equations with very large time steps. Design/meth ...
  • A FIC-based stabilized finite element formulation for turbulent flows 

    Cotela Dalmau, Jordi; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2017-03)
    Article
    Open Access
    We present a new stabilized finite element (FEM) formulation for incompressible flows based on the Finite Increment Calculus (FIC) framework. In comparison to existing FIC approaches for fluids, this formulation involves ...
  • A locally extended finite element method for the simulation of multi-fluid flows using the Particle Level Set method 

    Kamran, Kamran; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2015-09-01)
    Article
    Open Access
    The simulation of immiscible two-phase flows on Eulerian meshes requires the use of special techniques to guarantee a sharp definition of the evolving fluid interface. This work describes the combination of two distinct ...
  • A mixed Lagrangian and Eulerian FSI approach for simulation of overtopping on embankment dams 

    Larese De Tetto, Antonia; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (CIMNE (Centro Internacional de Métodos Numéricos en Ingeniería), 2009)
    Conference report
    Open Access
    The present work is concerned with some recent advances in FSI simulations with particular emphasis on the simulation of rockfill dams during extreme phenomena. The final objective is the study of the consequences of an ...
  • A modified fractional step approach 

    Ryzhakov, Pavel; Oñate Ibáñez de Navarra, Eugenio; Rossi, Riccardo (2011)
    Conference report
    Open Access
    We propose here a methodology for improving mass-conservation features of the fractional-step schemes on moving grids applied to viscous incompressible flows containing free surfaces. The idea is to find a better approximation ...
  • A monolithic Lagrangian approach for fluid-structure interaction problems 

    Ryzhakov, Pavel; Rossi, Riccardo; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2010-08)
    Article
    Restricted access - publisher's policy
    Current work presents a monolithic method for the solution of fluid–structure interaction problems involving flexible structures and free-surface flows. The technique presented is based upon the utilization of a Lagrangian ...
  • Analysis of stability of earth dams in overtopping scenarios with the particle finite element method 

    Larese De Tetto, Antonia; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (CIMNE (Centro Internacional de Métodos Numéricos en Ingeniería), 2009)
    Conference report
    Open Access
    The aim of this work is to study the consequences of an overtopping on the stability of earth dams and its possible failure mode. Rehabilitation and safety analysis of existing dams is nowadays an open field of research. ...
  • Analysis of the discharge capacity of radial gated-spillways using CFD and ANN: Oliana Dam case study 

    Salazar González, Fernando; Morán Moya, Rafael; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2013-03)
    Article
    Restricted access - publisher's policy
    The paper focuses on the analysis of radial-gated spillways, which is carried out by the solution of a numerical model based on the finite element method (FEM). The Oliana Dam is considered as a case study and the discharge ...
  • An efficient edge-based level set finite element method for free surface flow problems 

    Rossi, Riccardo; Larese De Tetto, Antonia; Dadvand, Pooyan; Oñate Ibáñez de Navarra, Eugenio (2013-02)
    Article
    Restricted access - publisher's policy
    We present an efficient technique for the solution of free surface flow problems using level set and a parallel edge-based finite elementmethod. An unstructured semi-explicit solution scheme is proposed. A custom data ...
  • An implicit Material Point Method applied to granular flows 

    Iaconeta, Ilaria; Larese De Tetto, Antonia; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (Elsevier, 2017)
    Conference lecture
    Open Access
    The main objective of this work lies in the development of a variational implicit Material Point Method (MPM), implemented in the open source Kratos Multiphysics framework. The ability of the MPM technique to solve large ...
  • 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 ...