Now showing items 1-15 of 15

  • 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
    Restricted access - publisher's policy
    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 finite element model for fluid–structure interaction problems involving closed membranes, internal and external fluids 

    Ryzhakov, Pavel; Oñate Ibáñez de Navarra, Eugenio (2017-11)
    Article
    Restricted access - publisher's policy
    In this paper we propose a Finite Element model for analyzing closed membranes (“bags”) interacting with internal and external (surrounding) fluids. The approach is based on embedding a Lagrangian monolithic model describing ...
  • 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 modified fractional step method for fluid–structure interaction problems 

    Ryzhakov, Pavel (Universitat Politècnica de Catalunya. CIMNE, 2017)
    Article
    Open Access
    We propose a Lagrangian fluid formulation particularly suitable for fluid–structure interaction (FSI) simulation involving free-surface flows and light-weight structures. The technique combines the features of fractional ...
  • 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 ...
  • An embedded approach for immiscible multi-fluid problems 

    Ryzhakov, Pavel; Jarauta Arabí, Alexandre (2015-11-30)
    Article
    Open Access
    An embedded formulation for the simulation of immiscible multi-fluid problems is proposed. The method is particularly designed for handling gas-liquid systems. Gas and liquid are modeled using the Eulerian and the Lagrangian ...
  • An explicit/implicit Runge–Kutta-based PFEM model for the simulation of thermally coupled incompressible flows 

    Martí, Julio Marcelo; Ryzhakov, Pavel (Springer, 2019-02)
    Article
    Restricted access - publisher's policy
    A semi-explicit Lagrangian scheme for the simulation of thermally coupled incompressible flow problems is presented. The model relies on combining an explicit multi-step solver for the momentum equation with an implicit ...
  • An implicit surface tension model for the analysis of droplet dynamics 

    Jarauta, Alex; Ryzhakov, Pavel; Pons Prats, Jordi; Secanell, Marc (2018-08-10)
    Article
    Open Access
    A Lagrangian incompressible fluid flow model is extended by including an implicit surface tension term in order to analyze droplet dynamics. The Lagrangian framework is adopted to model the fluid and track its boundary, ...
  • 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 semi-explicit multi-step method for solving incompressible navier-stokes equations 

    Ryzhakov, Pavel; Martí, Julio Marcelo (Multidisciplinary Digital Publishing Institute, 2018-01)
    Article
    Open Access
    The fractional step method is a technique that results in a computationally-efficient implementation of Navier–Stokes solvers. In the finite element-based models, it is often applied in conjunction with implicit time ...
  • A two-step monolithic method for efficient simulation of incompressible flows 

    Ryzhakov, Pavel; Cotela Dalmau, Jordi; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2014-04)
    Article
    Restricted access - publisher's policy
    We propose a simple technique for improving computational the e ciency of monolithic velocity-pressure solvers for incompressible ow problems. The idea consists in solving the discrete non-linear system of governing ...
  • A two-step monolithic method for the efficient simulation of incompressible flows 

    Ryzhakov, Pavel; Cotela Dalmau, Jordi; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2014-01)
    Article
    Restricted access - publisher's policy
    We propose a simple technique for improving computationally the efficiency of monolithic velocity–pressure solvers for incompressible flow problems. The idea consists in solving the discrete nonlinear system of governing ...
  • Lagrangian finite element model for the 3D simulation of glass forming processes 

    Ryzhakov, Pavel; García Espinosa, Julio; Oñate Ibáñez de Navarra, Eugenio (2016-12)
    Article
    Open Access
    We propose here a numerical model for a three-dimensional simulation of glass forming processes. Using the basic philosophy of the Particle Finite Element method (PFEM), we introduce several new features adapting the ...
  • Modelling and simulation of the sea-landing of aerial vehicles using the Particle Finite Element Method 

    Ryzhakov, Pavel; Rossi, Riccardo; Viña, Adria; Oñate Ibáñez de Navarra, Eugenio (2013-07)
    Article
    Open Access
    In this paper the Particle Finite Element Method (PFEM) is applied to the simulation of the sea-landing of an unmanned aerial vehicle (UAV). The problem of interest consists in modelling the impact of the vehicle against ...
  • On the application of the PFEM to droplet dynamics modeling in fuel cells 

    Ryzhakov, Pavel; Jarauta, Alex; Secanell, Marc; Pons Prats, Jordi (Springer, 2016-04-26)
    Article
    Open Access
    The Particle Finite Element Method (PFEM) is used to develop a model to study two-phase flow in fuel cell gas channels. First, the PFEM is used to develop the model of free and sessile droplets. The droplet model is ...