• A. Dias, E. Albuquerque, L. Campos, P. Sollero, A. Júnior
    Journal's Papers (2019). 63

    Abstract
    This paper presents a two-dimensional fast multipole boundary element method for large-scale analysis of anisotropic elastic problems. The expansions and fast multipole operations [...]

  • Journal's Papers (2019). 62

  • Advances in Engineering Software (1984). Vol. 6 (1), pp. 36-44

    Abstract
    A computer procedure for economically time-integrating large structural dynamics problems is presented. The main process is described as a two-step discretisation, the first [...]

  • E. Laitano, S. Idelsohn
    Advances in Engineering Software (1986). Vol. 8 (1), pp. 2-7

    Abstract
    A simple and efficient hidden line algorithm for finite element models is described here. The algorithm runs quickly, it has low computer storage and core size requirements. [...]

  • M. Storti, L. Crivelli, S. Idelsohn
    Advances in Engineering Software (1987). Vol. 9 (2), pp. 66-73

    Abstract
    This paper is devoted to the numerical solution of phase-change problems in two dimensions. The technique of finite elements is employed. The discretization is carried out [...]

  • Advances in Engineering Software and Workstations (1991). Vol. 13 (2), pp. 58-67

    Abstract
    The present work generalises the earlier work in which a variational principle technique was presented in order to evaluate the magnitude of upwind required to solve the compressible [...]

  • Advances in Engineering Software and Workstations (1991). Vol. 13 (1), pp. 46-50

    Abstract
    The elastic stability of shells or shell-like structures under two independent load parameters is considered. One of the loads is associated to a limit point form of buckling, [...]

  • Commun. Numer. Meth. Engng (1995). Vol. 11 (3), pp. 199-211

    Abstract
    This work is devoted to the simulation by finite elements of nearly incompressible inviscid flows in real 3D geometries, by means of an Euler code based on the SUPG (streamline [...]

  • Journal of Fluids Engineering (1999). Vol. 122 (2), 309-317

    Abstract
    A panel Fourier method for ship-wave flow problems is considered here. It is based on a three-dimensional potential flow model with a linearized free surface condition, and [...]

  • Commun. Numer. Meth. Engng (1998). Vol. 14 (9), pp. 849-861

    Abstract
    A discrete non‐local (DNL) boundary condition is used to solve the water waves propagation problem over variable depth. This condition is obtained by means of full solution [...]

  • S. Idelsohn, M. Storti, L. Crivelli
    Archives of Comp. Meths. Engng. (1994). Vol. 1 (1), pp. 49-74

    Abstract
    This paper summarizes the state of the art of the numerical solution of phase-change problems. After describing the governing equations, a review of the existing methods is [...]

  • Int. J. of Num. Meths. for Heat and Fluid Flow (1997). Vol. 7 (2/3), pp. 141-168

    Abstract
    Addresses two difficulties which arise when using a compressible code with equal order interpolation (non‐staggered grids in the finite‐difference nomenclature) to capture [...]

  • Appl. Mech. Rev. (1995). Vol. 48 (11), pp. 203-210

    Abstract
    A numerical algorithm based on the CVBEM (from Complex Variable Boundary Element Method) for plane incompressible potential flow around aerofoils and cascades is described. [...]

  • P. Laura, R. Gutiérrez, V. Sonzogni, S. Idelsohn
    Ocean Engng. (1997). Vol. 24 (1), pp. 51-62

    Abstract
    This paper deals with the solution of the title problem in the case where the outer boundary is subjected to uniform, hydrostatic pressure while the inner edge of the plate [...]

  • Ocean Engng. (2002). Vol. 29 (3), p. 261-278

    Abstract
    An applied Fourier transform computation for the hydrodynamic wave-resistance coefficient is shown, oriented to potential flows with a free surface and infinity depth. The [...]

  • Commun. Numer. Meth. Engng (1998). Vol. 14 (11), pp. 997-1012

    Abstract
    A method for computing ship wave resistance from a momentum flux balance is presented. It is based on computing the momentum flux carried by the gravity waves that exit the [...]

  • Commun. Numer. Meth. Engng (1995). Vol. 11 (3), pp. 199-211

    Abstract
    This work is devoted to the simulation by finite elements of nearly incompressible inviscid flows in real 3D geometries, by means of an Euler code based on the SUPG (streamline [...]

  • Int. J. Numer. Meth. Fluids (2000). Vol. 32 (1), pp. 1-22

    Abstract
    The iterative solution of linear systems arising from panel method discretization of three‐dimensional (3D) exterior potential problems coming mainly from aero‐hydrodynamic [...]

  • Int. J. Numer. Meth. Fluids (1995). Vol. 20 (8-9), pp. 1003-1022

    Abstract
    We present a method to assess the stability of pairs of interpolation spaces for mixed formulations. The method is based on a straightforward calculation of the eigenvalues [...]

  • Int. J. Numer. Meth. Fluids (1997). Vol. 25 (12), pp. 1347-1371

    Abstract
    This paper presents several numerical results using a vectorized version of a 3D finite element compressible and nearly incompressible Euler and Navier–Stokes code. [...]

  • Int. J. Numer. Meth. Fluids (1999). Vol. 29 (5), pp. 605-621

    Abstract
    The finite element method is employed to approximate the solutions of the Helmholtz equation for water wave radiation and scattering in an unbounded domain. A discrete, non‐local [...]

  • Commun. Numer. Meth. Engng (1993). Vol. 9 (9), pp. 729-743

    Abstract
    In a recent paper we presented a data structure to be used with multigrid techniques on non‐homogeneously refined FEM meshes. This paper focuses on the adaptive refinement [...]

  • Int. J. Numer. Meth. Fluids (1994). Vol. 19 (1), pp. 1-22

    Abstract
    The modelling of liquid flow in gas‐stirred vessels is described. A simple two‐phase model accounts for the buoyancy effect of bubbles. Friction between liquid and gas [...]

  • V. Sonzogni, S. Idelsohn, P. Laura, V. Cortínez
    Journal of Sound and Vibration (1990). Vol. 140 (3), pp. 513-522

    Abstract
    Transverse vibrations of the structural system described in the title are analyzed by using classical plate theory and employing two different methodologies: the recently [...]

  • G. Kaufmann, A. Lopergolo, S. Idelsohn
    J. Appl. Mech (1983). Vol. 50 (4a), pp. 896-897

    Abstract
    The usefulness of using the speckle photography technique in fracture mechanics to check numerical calculations is demonstrated for an internally pressurized cylinder with [...]

  • L. Ercoli, V. Sonzogni, S. Idelsohn, P. Laura
    Journal of Sound and Vibration (1992). Vol. 135 (2), pp. 217-221

    Abstract
    An approximate analytical solution is obtained for the title problem by using a Navier-type solution. It is shown that the fundamental frequency coefficient obtained by means [...]

  • S. Idelsohn, L. Costa, R. Ponso
    Journal of Biomechanics (1985). Vol. 18 (2), pp. 97-115

    Abstract
    The steady flow of blood through three common types of prosthetic heart valves was simulated numerically using the finite element method. The velocity, pressure and stress [...]

  • G. Kaufmann, A. Lopergolo, S. Idelsohn, E. Barbero
    Experimental Mechanics (1987). Vol. 27 (2), pp. 154-157

    Abstract
    Two techniques, speckle photography and holographic interferometry, were used to test three-dimensional finite-element calculations in an internally pressurized cylinder with [...]

  • Earthquake Engineering Structural Dynamics (1984). Vol. 12 (6), pp. 721-736

    Abstract
    A reinforced concrete frame‐wall structure of a building designed in accordance to standard practice in Argentina was analysed by the procedures prescribed by current Argentine [...]

  • E. Barbero, G. Kaufmann, S. Idelsohn
    Optics & Laser Technology (1990). Vol. 22 (1), pp. 17-22

    Abstract
    The fracture behaviour of a four-point bend surface-coated ceramic specimen with a through-the-thickness crack was experimentally investigated. Speckle photography was used [...]

  • H. Antúnez, S. Idelsohn
    Engineering Computations (1992). Vol. 9 (5), pp. 547-559

    Abstract
    The pseudo‐concentration method is applied to the analysis of transient processes. A simple, easy‐to‐handle model is obtained by keeping an Eulerian description: it [...]

  • J. Jeusette, G. Laschet, S. Idelsohn
    Computers and Structures (1989). Vol. 32 (1), pp. 125-135

    Abstract
    In the prebuckling range of the complete nonlinear response of a structure submitted to destabilizing loads, a linearized stability analysis is generally an interesting tool. [...]

  • M. Geradin, S. Idelsohn, M. Hogge
    Nuclear Engineering and Design (1980). Vol. 58 (3), pp. 339-348;

    Abstract
    This paper is an attempt to compare Newton and quasi-Newton methods in nonlinear structural dynamics. After a review of the classical iterative methods, several quasi-Newton [...]

  • Nuclear Engineering and Desing (1985). Vol. 90 (2), pp. 209-222

    Abstract
    An application of the British CEGB's R6 Failure Assessment Approach to the determination of failure internal pressure of nuclear power plant spherical steel containments [...]

  • M. Geradin, S. Idelsohn, M. Hogge
    Computers and Structures (1981). Vol. 13 (1-3), pp. 73-81

    Abstract
    The usefulness of quasi-Newton methods for the solution of nonlinear systems of equations is demonstrated. After a review of the Newton iterative method, several quasi-Newton [...]

  • Computers and Structures (1985). Vol. 20 (1-3), pp. 203-210

    Abstract
    A computational algorithm for predicting the dynamical response of a nonlinear structure by means of a reduction scheme is described. In it, the nonlinear system of ordinary [...]

  • H. Antúnez, S. Idelsohn, E. Dvorkin
    Computers and Structures (1992). Vol. 44 (1-2), pp. 435-451

    Abstract
    An analysis of metal forming processes with axial geometry is performed by an expansion in Fourier series on the circumferential direction. For that purpose, an incremental [...]

  • S. Idelsohn, M. Geradin
    Journal of Sound and Vibration (1982). Vol. 83 (2), pp. 143-155

    Abstract
    The type of convergence to the eigenspectrum of a structure calculated from a finite element analysis is examined in light of the variational properties of the Rayleigh quotient [...]

  • M. Storti, L. Crivelli, S. Idelsohn
    Int. J. Numer. Meth. Engng. (1987). Vol. 24 (2), pp. 375-392

    Abstract
    This paper presents a method for straightening curved interfaces arising in phase‐change problems. The method works on isoparametric finite elements, performing a second [...]

  • Int. J. Numer. Meth. Engng. (1989). Vol. 28 (4), pp. 769-784

    Abstract
    The amount of upwind or magnitude of off‐centering needed in the numerical solution of second order differential equations with significant first derivatives is justified [...]

  • C. Baumann, M. Storti, S. Idelsohn
    Int. J. Numer. Meth. Engng. (1992). Vol. 34 (2), pp. 453-568

    Abstract
    This paper report progress on a technique to accelerate the convergence to steady solutions when the streamline‐upwind/Petrov‐Galerkin (SUPG) technique is used. Both the [...]

  • M. Storti, C. Baumann, S. Idelsohn
    Int. J. Numer. Meth. Engng. (1992). Vol. 34 (2), pp. 519-541

    Abstract
    When explicit time marching algorithms are used to reach the steady state of problems governed by the Euler equations, the rate of convergence is strongly impaired both in [...]

  • H. Antúnez, S. Idelsohn
    Int. J. Numer. Meth. Engng. (1994). Vol. 37 (21), pp. 3621-3632

    Abstract
    A semi‐analytical formulation is presented for transient metal‐forming processes which, being axisymmetric in geometry, are subjected to non‐axisymmetric loads and boundary [...]

  • Int. J. Numer. Meth. Engng. (2000). Vol. 47 (5), pp. 969-983

    Abstract
    A non‐reflecting boundary condition based on the Gauss filter is employed for the determination of scattered potential governed by the equation. A filtering layer is used [...]

  • N. Calvo, S. Idelsohn
    Int. J. Numer. Meth. Engng. (2001). Vol. 50 (8), pp. 1957-1967

    Abstract
    This research work deals with the analysis and test of a normalized‐Jacobian metric used as a measure of the quality of all‐hexahedral meshes. Instead of element qualities, [...]

  • N. Calvo, S. Idelsohn
    Int. J. Numer. Meth. Engng. (2002). Vol. 55 (12), pp. 1439-1449

    Abstract
    There has been some degree of success in all‐hexahedral meshing. Standard methods start with the object geometry defined by means of an all‐quadrilateral mesh, followed [...]

  • S. Idelsohn, J. Gimenez, J. Marti, N. Nigro
    Comput. Methods Appl. Mech. Engrg., (2017). Vol. 313, pp. 535-559

    Abstract
    This paper presents a finite element that incorporates weak, strong and both weak plus strong discontinuities with linear interpolations of the unknown [...]

  • G. Sander, S. Idelsohn
    Int. J. Numer. Meth. Engng. (1982). Vol. 18 (3), pp. 363-380

    Abstract
    The problem related to the derivation of conforming deep shell finite elements is examined in the light of the thin shell theory and using the classical Loves strain energy [...]

  • L. Crivelli, S. Idelsohn
    Int. J. Numer. Meth. Engng. (1986). Vol. 23 (1), pp. 99-119

    Abstract
    A finite element procedure for solving multidimensional phase change problems is described. The algorithm combines a temperature formulation with a finite element treatment [...]

  • Int. J. Numer. Meth. Engng. (1986). Vol. 23 (6), pp. 1023-1042

    Abstract
    A new algorithm for solving transient thermal problems in a reduced subspace of the original space of discretization is described. The basis of the subspace is formed by using [...]

  • S. Idelsohn, G. Laschet, C. Nyssen
    Comput. Methods Appl. Mech. Engrg., (1982). Vol. 30 (2), pp. 133-149

    Abstract
    An isoparametric finite element tor the analysis of multi-layer composite materials is presented. Several linear and nonlinear stress-strain relations are discussed. Special [...]

  • Comput. Methods Appl. Mech. Engrg., (1985). Vol. 49(3), pp. 253-279

    Abstract
    A computational algorithm for predicting the nonlinear dynamic response of a structure is presented. The nonlinear system of ordinary differential equations resulting from [...]

  • M. Storti, L. Crivelli, S. Idelsohn
    Comput. Methods Appl. Mech. Engrg., (1988). Vol. 66(1), pp. 65-86

    Abstract
    Using weak formulations and finite elements to solve heat-conduction problems with phase change finally leads to the solution, at each time step, of a nonlinear system of [...]

  • Comput. Methods Appl. Mech. Engrg., (1991). Vol. 93(1), pp. 13-30

    Abstract
    Multigrid and adaptive refinement techniques are powerful tools in the resolution of problems arising from computational mechanics. In structured grids the number of numerical [...]

  • C. Baumann, M. Storti, S. Idelsohn
    Comput. Methods Appl. Mech. Engrg., (1992). Vol. 95 (1), pp. 49-70

    Abstract
    This paper is both the description of a streamline-upwind/Petrov-Galerkin (SUPG) formulation and the documentation of the development of a code for the finite element solution [...]

  • Comput. Methods Appl. Mech. Engrg., (1995). Vol. 124 (3), pp. 231-252

    Abstract
    Solving large systems of equations from CFD problems by the explicit pseudo-temporal scheme requires a very low amount of memory and is highly parallelizable, but the CPU [...]

  • Comput. Methods Appl. Mech. Engrg., (1996). Vol. 136 (1–2), pp. 27-46

    Abstract
    In this work we present a new method called (SU + C)PG to solve advection-reaction-diffusion scalar equations by the Finite Element Method (FEM). The SUPG (for Streamline [...]

  • Comput. Methods Appl. Mech. Engrg., (1997). Vol. 143 (3–4), pp. 317-331

    Abstract
    In this paper we present a new SUPG formulation for compressible and near incompressible Navier-Stokes equations [5]. It introduces an extension of the exact solution for [...]

  • N. Nigro, M. Storti, S. Idelsohn, T. Tezduyar
    Comput. Methods Appl. Mech. Engrg., (1998). Vol. 154 (3–4), pp. 203-228

    Abstract
    This paper presents the implementation of a local physics preconditioning mass matrix [8] for an unified approach of 3D compressible and incompressible Navier-Stokes equations [...]

  • Comput. Methods Appl. Mech. Engrg., (2000). Vol. 182 (3–4), pp. 483-498

    Abstract
    A general methodology for developing absorbing boundary conditions is presented. For planar surfaces, it is based on a straightforward solution of the system of block difference [...]

  • A. Limache, R. Sánchez, L. Dalcín, S. Idelsohn
    Comput. Methods Appl. Mech. Engrg., (2008). Vol. 197 (49–50), pp. 4180-4192

    Abstract
    Laplace formulations are weak formulations of the Navier–Stokes equations commonly used in computational fluid dynamics. In these schemes, the viscous terms are given [...]

  • N. Calvo, S. Idelsohn
    Comput. Methods Appl. Mech. Engrg., (2000). Vol. 182 (3–4), pp. 371-378

    Abstract
    The domain geometry is defined by means of a closed all-quadrilateral mesh. The outer mesh imposes very strong restrictions on the possible connectivities between the inner [...]

  • Comput. Methods Appl. Mech. Engrg., (1981). Vol. 26 (3), pp. 321-330

    Abstract
    This paper is confined to the study of thin shells. The aim is to summarize the different theories used and to examine the assumptions upon which each of them is based. The [...]

  • Journal's Papers (2018). 2

    Abstract
    To address the contradiction between supply and demand of water resources in China, mitigate flood and drought disasters, develop sustainable hydropower resources, realize [...]

  • Z. Xuecai, W. Wenwu, W. Fan, W. Zhengzhong, X. Zhang
    Journal's Papers (2018). 1

    Abstract
    '''To address the contradiction between supply and demand of water resources in China, mitigate flood and drought disasters, develop sustainable hydropower resources, [...]

  • E. Oñate, S. Idelsohn, F. Pin, R. Aubry
    (2004). Research Report, Nº PI243

    Abstract
    We present a general formulation for analysis of fluid-structure interaction problems using the particle finite element method (PFEM). The key feature of the PFEM is the use [...]

  • Comput. Methods Appl. Mech. Engrg., (2008). Vol. 197 (19-20), pp. 1777–1800

    Abstract
    We present some advances in the formulation of the Particle Finite Element Method (PFEM) for solving complex fluid-structure interaction problems with free surface waves. [...]

  • M. Mier-Torrecilla, S. Idelsohn, E. Oñate
    Int. J. Numer. Meth. Fluids (2010). Vol. 67 (11), pp. 1516-1539

    Abstract
    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 [...]

  • S. Idelsohn, E. Oñate, N. Nigro, P. Becker
    Comput. Methods Appl. Mech. Engrg., (2015). Vol. 293, pp. 191–206; (preprint)

    Abstract
    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 [...]

  • J. Giménez, N. Nigro, S. Idelsohn, E. Oñate
    Computers and Fluids (2016). (preprint) Vol. 141, pp. 90-104

    Abstract
    In previous works [1,2], the authors have presented a highly efficient extension of the Particle Finite Element Method, called PFEM-2, to solve two-phase flows. The methodology [...]

  • E. Ortega, E. Oñate, S. Idelsohn
    (2011). Research Report, Nº PI368

    Abstract
    An adaptive Finite Point Method (FPM) for solving aeroelastic compressible flow problems is presented. The numerical methodology is based on a meshless upwind-biased discretization [...]

  • P. Becker, S. Idelsohn, E. Oñate
    Computational Mechanics (2015). (preprint) Vol. 55, pp. 1091–1104

    Abstract
    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 [...]

  • F. Kempel, B. Schartel, J. Marti, K. Butler, R. Rossi, S. Idelsohn, E. Oñate
    Fire and Materials (2015). Vol. 39 (6), pp. 570-584

    Abstract
    An experimental and numerical investigation of the effect of bisphenol A bis(diphenyl phosphate) (BDP) and polytetrafluoroethylene (PTFE) on the fire behaviour of bisphenol [...]

  • E. Oñate, J. García-Espinosa, S. Idelsohn, F. Pin
    Comput. Methods Appl. Mech. Engrg., (2006). Vol. 195 (23-24), pp. 3001-3037

    Abstract
    We present a general formulation for incompressible fluid flow analysis using the finite element method (FEM). The standard Eulerian formulation is described first. The necessary [...]

  • S. Idelsohn, J. Marti, A. Limache, E. Oñate
    Comput. Methods Appl. Mech. Engrg., (2008). Vol. 197, pp. 1762–1776

    Abstract
    We present a general Lagrangian formulation for treating elastic solids and quasi/fully incompressible fluids in a unified form. The formulation allows to treat solid and [...]

  • S. Idelsohn, E. Oñate, F. Pin, N. Calvo
    Comput. Methods Appl. Mech. Engrg., (2006). Vol. 195 (17-18), pp. 2100-2123

    Abstract
    In the present work a new approach to solve fluid-structure interaction problems is described. Both, the equations of motion for fluids and for solids have been approximated [...]

  • S. Idelsohn, N. Calvo, E. Oñate
    Comput. Methods Appl. Mech. Engrg., (2003). Vol. 192, pp. 2649–2667

    Abstract
    Given a 3D point set, the problem of defining the volume associated, dividing it into a set of regions (elements) and defining a boundary surface is tackled. Several [...]

  • Int. J. Numer. Meth. Engng. (2010). Vol. 81 (8), pp. 1046-1072

    Abstract
    A new computational procedure for analysis of the melting and flame spread of polymers under fire conditions is presented. The method, termed Particle Finite Element Method [...]

  • Int. J. Numer. Meth. Biomed. Engng (2010). Vol. 26 (10), pp. 1313-1330

    Abstract
    The purpose of this paper is to put in evidence that the fractional‐step method (FSM) used to solve the incompressible transient Euler and Navier–Stokes equations [...]

  • Int. J. Numer. Meth. Engng. (2004). Vol. 61 (7), pp. 964-989

    Abstract
    Particle Methods are those in which the problem is represented by a discrete number of particles. Each particle moves accordingly with its own mass and the external/internal [...]

  • E. Ortega, R. Flores, E. Oñate, S. Idelsohn
    Computational Mechanics (2017). Vol. 60 (2), pp. 219-233

    Abstract
    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 [...]

  • Int. J. Numer. Meth. Fluids (2010). Vol. 65 (1-3), pp. 106-134

    Abstract
    We present a collection of stabilized finite element (FE) methods derived via first‐ and second‐order finite calculus (FIC) procedures. It is shown that several well known [...]

  • Int. J. Numer. Meth. Engng. (1994). Vol. 37 (19), pp. 3323-3341

    Abstract
    In this paper a comparison between the finite element and the finite volume methods is presented in the context of elliptic, convective–diffusion and fluid flow problems. [...]

  • R. Löhner, C. Sacco, E. Oñate, S. Idelsohn
    Int. J. Numer. Meth. Engng. (2002). Vol. 53 (8), pp. 1765-1779

    Abstract
    A weighted least squares finite point method for compressible flow is formulated. Starting from a global cloud of points, local clouds are constructed using a Delaunay technique [...]

  • E. Oñate, S. Idelsohn, O. Zienkiewicz, R. Taylor, C. Sacco
    Comput. Methods Appl. Mech. Engrg., (1996). Vol. 195, pp. 6750-6777

    Abstract
    flow type problems is presented. The method is based on the use of a weighted least square interpolation procedure together with point collocation for evaluating the approximation [...]

  • Fire Technology (2018). Vol. 54 (6), pp. 1783–1805

    Abstract
    The tendency of the polymers to melt and drip when they are exposed to external heat source play a very important role in the ignition and the spread of fire. Numerical simulation [...]

  • S. Idelsohn, N. Nigro, A. Limache, E. Oñate
    Comput. Methods Appl. Mech. Engrg., (2012). Vol. 217-220, pp. 168-185

    Abstract
    An explicit time integrator without the CFL < 1 restriction for the momentum equation is presented. This allows stable large time-steps in problems dominated [...]

  • E. Oñate, J. Rojek, M. Chiumenti, S. Idelsohn, F. Pin, R. Aubry
    Comput. Methods Appl. Mech. Engrg., (2006). Vol. 195, pp. 6750-6777

    Abstract
    The paper describes some recent developments in finite element and particle methods for analysis of a wide range of bulk forming processes. The developments include new stabilized [...]

  • Computers and Structures (2003). Vol. 81 (8-11), pp. 655-671

    Abstract
    A method is presented for the solution of the incompressible fluid flow equations using a Lagrangian formulation. The interpolation functions are [...]

  • Comput. Methods Appl. Mech. Engrg., (2013). Vol. 255 (1), pp. 210-225

    Abstract
    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 [...]

  • Comput. Methods Appl. Mech. Engrg., (2006). Vol. 195 (13-16), pp. 1793–1825

    Abstract
    A finite element method (FEM) for steady-state convective-diffusive problems presenting sharp gradients of the solution both in the interior of the domain and in boundary [...]

  • Computational Mechanics (2012). Vol. 50 (6), pp. 805-819

    Abstract
    This paper aims to present a coupled solution strategy for the problem of seepage through a rockfill dam taking into account the free-surface flow within the solid as well [...]

  • Comput. Methods Appl. Mech. Engrg., (2006). Vol. 195, pp. 4681–4696

    Abstract
    In the last decade a family of methods called meshless methods has been developed both for structural and fluid mechanics problems. After these ideas, a possible classification [...]

  • Int. J. Numer. Meth. Engng. (1999). Vol. 45 (5), pp. 503-528

    Abstract
    An unstructured finite element solver to evaluate the ship‐wave problem is presented. The scheme uses a non‐structured finite element algorithm for the Euler or Navier–Stokes [...]

  • Engineering Computations (2003). Vol. 20 (5-6), pp. 583-600

    Abstract
    The extended Delaunay tessellation (EDT) is presented in this paper as the unique partition of a node set into polyhedral regions defined by nodes lying on the nearby Voronoï [...]

  • S. Idelsohn, J. Heinrich, E. Oñate
    Int. J. Numer. Meth. Engng. (1996). Vol. 39 (9), pp. 1455-1473

    Abstract
    A Petrov–Galerkin formulation based on two different perturbations to the weighting functions is presented. These perturbations stabilize the oscillations that are normally [...]

  • Int. J. Numer. Meth. Engng. (2003). Vol. 58 (6), pp. 893-912

    Abstract
    A meshless method is presented which has the advantages of the good meshless methods concerning the ease of introduction of node connectivity in a bounded time of order n, [...]

  • E. Oñate, S. Idelsohn, C. Felippa
    Int. J. Numer. Meth. Engng. (2011). Vol. 87 (1-5), pp. 171-195

    Abstract
    We present a stabilized numerical formulation for incompressible continua based on a higher‐order Finite Calculus (FIC) approach and the finite element method. The focus [...]

  • Computers and Structures (2005). Vol. 83 (17-18), pp. 1459-1475

    Abstract
    A method is presented for the solution of an incompressible viscous fluid flow with heat transfer using a fully Lagrangian description of the motion. Due [...]

  • A. Geyer, J. Phillips, M. Mier-Torrecilla, S. Idelsohn, E. Oñate
    Experiments in Fluids (2011). Vol 52 (1), pp. 261-257

    Abstract
    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 [...]

  • J. Appl. Mech (2003). Vol. 70 (1), pp. 18-26

    Abstract
    A stabilized semi-implicit fractional step algorithm based on the finite element method for solving ship wave problems using unstructured meshes is presented. The stabilized [...]

  • Computing and Visualization in Science (2000). Vol. 3 (1), pp. 67-75

    Abstract
    A stabilized finite point method (FPM) for the meshless analysis of incompressible fluid flow problems is presented. The stabilization approach is based in the finite increment [...]

  • Int. J. Numer. Meth. Engng. (2009). Vol. 80, (10), pp. 1261-1294

    Abstract
    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 [...]

  • E. Ortega, E. Oñate, S. Idelsohn, C. Buachart
    Int. J. Numer. Meth. Engng. (2011). Vol. 88 (2), pp. 180-204

    Abstract
    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 [...]

  • S. Idelsohn, M. Mier-Torrecilla, E. Oñate
    Comput. Methods Appl. Mech. Engrg., (2009). vol. 198, pp. 2750–2767

    Abstract
    Particle methods are those in which the problem is represented by a discrete number of particles. Each particle moves accordingly with its own mass and the external/internal [...]

  • Computational Mechanics (2011). Vol. 48 (3), pp. 307-318

    Abstract
    We present some developments in the particle finite element method (PFEM) for analysis of complex coupled problems in mechanics involving fluid–soil–structure [...]

  • R. Rossi, F. Mossaiby, S. Idelsohn
    Computers & Fluids (2013). Vol. 81, pp. 134-144

    Abstract
    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 [...]

  • Computational Mechanics (1998). Vol. 21 (4-5), pp. 283-292

    Abstract
    The finite point method (FPM) is a gridless numerical procedure based on the combination of weighted least square interpolations on a cloud of points with point collocation [...]

  • R. Aubry, R. Lohner, E. Oñate, S. Idelsohn
    American Institute of Aeronautics and Astronautics Paper (AIAA) (2007). 2007-0715

    Abstract
    An incompressible Finite Element Lagrangian code is presented and validated against classical experimental and numerical Eulerian results. The main distinction between an [...]

  • Comput. Methods Appl. Mech. Engrg., (2015). Vol. 293, pp. 191-206

    Abstract
    We present a 3-noded triangle and a 4-noded tetrahedra with a continuous linear velocity and a discontinuous linear pressure field formed by the sum of an unknown ''constant [...]

  • Int. J. Numer. Meth. Engng. (2012). Vol. 92 (9), pp. 782-801

    Abstract
    In this paper, we present a computational algorithm for solving an important practical problem, namely, the thermoplastic polymer melting under fire conditions. We propose [...]

  • Computational Mechanics (2006). Vol. 38 (4-5), pp. 294-309

    Abstract
    The method presented in Aubry et al. (Comput Struc 83:1459–1475, 2005) for the solution of an incompressible viscous fluid flow with heat transfer using a fully Lagrangian [...]

  • J. Heinrich, S. Idelsohn, E. Oñate, C. Vionnet
    Int. J. Numer. Meth. Engng. (1996). Vol. 39 (6), pp. 1053-1071

    Abstract
    We examine the use of natural boundary conditions and conditions of the Sommerfeld type for finite element simulations of convective transport in viscous incompressible flows. [...]

  • Computational Mechanics (2008). Vol. 43 (1), pp. 125-132

    Abstract
    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 [...]

  • E. Oñate, S. Idelsohn, O. Zienkiewicz, R. Taylor
    Int. J. Numer. Meth. Engng. (1996). Vol. 39 (22), pp. 3839-3866

    Abstract
    The paper presents a fully meshless procedure fo solving partial differential equations. The approach termed generically the ‘finite point method’ is based on [...]

  • Int. J. Numer. Meth. Engng. (2012). Vol. 90 (12), pp. 1435-1451

    Abstract
    We propose a technique for improving mass‐conservation features of fractional step schemes applied to incompressible flows. The method is illustrated by using a Lagrangian [...]

  • Computational Mechanics (2010). Vol. 46 (6), pp. 883-899

    Abstract
    Current work presents a monolithic method for the solution of fluid–structure interaction problems involving flexible structures and free-surface flows. The technique [...]

  • Computational Mechanics (2014). Vol. 54 (4), pp. 1013-1022

    Abstract
    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 [...]

  • S. Idelsohn, M. Mier-Torrecilla, N. Nigro, E. Oñate
    Computational Mechanics (2010). Vol. 46 (1), pp. 115-124

    Abstract
    Heterogeneous incompressible fluid flows with jumps in the viscous properties are solved with the particle finite element method using continuous and discontinuous pressure [...]

  • C. Felippa, E. Oñate, S. Idelsohn
    Archives of Comp. Meths. Engng. (2017). Vol. 25 (4), pp. 919–963

    Abstract
    This is part of an article series on a variational framework for continuum mechanics based on the Finite Increment Calculus (FIC). The formulation utilizes high order derivatives [...]

  • P. Becker, S. Idelsohn
    Acta Geotechnica (2016). Vol. 11 (3), pp. 643-657

    Abstract
    We present an approach for the simulation of landslides using the Particle Finite Element Method of the second generation. In this work, the multiphase nature (granular phase [...]

  • P. Dadvand, R. Rossi, M. Gil, X. Martorell, J. Cotela, E. Juanpere, S. Idelsohn, E. Oñate
    Computers and Fluids (2013). Vol. 80, pp. 301-309

    Abstract
    Creating a highly parallelizable code is a challenge specially for Distributed Memory Machines (DMMs). Moreover, algorithms and data structures suitable for these platforms [...]

  • J. Gimenez, D. Ramajo, S. Damián, N. Nigro, S. Idelsohn
    Comp. Part. Mech. (2016). Vol. 4 (3), pp. 251-267

    Abstract
    The latest generation of the particle finite element method (PFEM-2) is a numerical method based on the Lagrangian formulation of the equations, which presents advantages [...]

  • Comp. Part. Mech (2017). Vol. 4 (3), pp. 249-249

    Abstract
    Particle-based methods in which each material particle is followed in a Lagrangian manner have been used successfully in the last years for different applications. One [...]

  • Computational Mechanics (2007). Vol. 40 (6), pp. 949-963

    Abstract
    At the local level, successful meshless techniques such as the Finite Point Method must have two main characteristics: a suitable geometrical support and a robust numerical [...]

  • Engineering Computations (2008). Vol. 25 (3-4), pp. 385-425

    Abstract
    Purpose – The purpose of this paper is to evaluate the possibilities of the particle finite element method for simulation of free surface flows. Design/methodology/approach [...]

  • Comput. Methods Appl. Mech. Engrg., (2017). Vol. 326, pp. 739-756

    Abstract
    Problems characterised by steep moving gradients are challenging for any numerical technique and even more for the successful formulation of Reduced Order Models (ROMs). [...]

  • Comput. Methods Appl. Mech. Engrg., (2017). Vol. 315, pp. 1080-1097

    Abstract
    We propose here a displacement-based updated Lagrangian fluid model developed to facilitate a monolithic coupling with a wide range of structural elements [...]

  • S. Costarelli, L. Garelli, M. Cruchaga, M. Storti, R. Ausensi, S. Idelsohn
    Comput. Methods Appl. Mech. Engrg., (2016). Vol. 300, pp. 106-128

    Abstract
    A Navier–Stokes solver based on Cartesian structured finite volume discretization with embedded bodies is presented. Fluid structure interaction with [...]

  • F. Mossaiby, R. Rossi, P. Dadvand, S. Idelsohn
    Int. J. Numer. Meth. Engng. (2012). Vol. 89 (13), pp. 1635-1651

    Abstract
    The solution of problems in computational fluid dynamics (CFD) represents a classical field for the application of advanced numerical methods. Many different approaches were [...]

  • Int. J. Numer. Meth. Fluids (2007). Vol. 54 (6-8), pp. 639-664

    Abstract
    The Navier–Stokes equations written in Laplace form are often the starting point of many numerical methods for the simulation of viscous flows. Imposing the natural [...]

  • S. Idelsohn, J. Gimenez, N. Nigro
    Int. J. Numer. Meth. Fluids (2018). Vol. 86 (12), pp. 750–769

    Abstract
    In a previous paper, the authors presented an elemental enriched space to be used in a finite‐element framework (EFEM) capable of reproducing kinks and jumps in an unknown [...]

  • Int. J. Computational Fluid Dynamics (2002). Vol. 16 (4), pp. 283-295

    Abstract
    The aim of this paper is to describe the methodology followed in order to determine the viscous effects of a uniform wind on the blades of small horizontal-axis wind turbines [...]

  • Int. J. Numer. Meth. Fluids (2013). Vol. 73 (4), pp. 323-343

    Abstract
    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 [...]

  • Acta Geotechnica (2006). Vol. 1 (4), pp. 237-252

    Abstract
    We present a general formulation for modeling bed erosion in free surface flows using the particle finite element method (PFEM). The key feature of the PFEM is the use of [...]

  • A. Jarauta, M. Secanell, J. Pons Prats, P. Ryzhakov, S. Idelsohn, E. Oñate
    Int. J. Hydrogen Energy (2015). Vol. 40 (15), pp. 5375-5383

    Abstract
    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, [...]

  • Comput. Methods Appl. Mech. Engrg., (2013). Vol. 267, pp. 23-42

    Abstract
    In this work, a domain decomposition strategy for non-linear hyper-reduced-order models is presented. The basic idea consists of restricting the reduced-order basis functions [...]

  • J. D'Elía, M. Storti, S. Idelsohn
    Advances in Engineering Software (2000). Vol. 31 (5), pp. 339-346

    Abstract
    A weak form to compute the dipolar and monopolar surface gradients, related to a low-order panel method, is shown. The flow problem is formulated by means of a three-dimensional [...]

  • Comput. Methods Appl. Mech. Engrg., (2014). Vol. 274, pp. 237-263

    Abstract
    The simulation of engineering problems is quite often a complex task that can be time consuming. In this context, the use of Hyper Reduced Order Models (HROMs) is a promising [...]

  • S. Idelsohn, N. Nigro, J. Gimenez, R. Rossi, J. Marti
    Engineering Computations (2013). Vol. 30 (2), pp. 197-222

    Abstract
    Purpose   – The purpose of this paper is to highlight the possibilities of a novel Lagrangian formulation in dealing with the solution [...]

  • Int. J. Numer. Meth. Fluids (2008). Vol. 60 (9), pp. 937-971

    Abstract
    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 [...]

  • Journal of Computational Physics (1998). Vol. 146 (2), pp 570-602

    Abstract
    An absorbing boundary condition for the ship wave resistance problem is presented. In contrast to the Dawson-like methods, it avoids the use of numerical viscosities in the [...]

  • Computers and Fluids (2007). Vol. 36 (1), pp. 27-38

    Abstract
    The Particle Finite Element Method (PFEM) is a well established numerical method [Aubry R, Idelsohn SR, Oñate E, Particle finite element method in fluid mechanics [...]

  • M. Storti, R. Paz, L. Dalcin, S. Costarelli, S. Idelsohn
    Computers and Fluids (2013). Vol. 74, pp. 44-57

    Abstract
    Graphic processing units have received much attention in last years. Compute-intensive algorithms operating on multidimensional arrays that have nearest neighbor dependency [...]

  • Mathematical Models and Methods in Applied Sciences (2013). Vol. 23 (2), pp. 339–367

    Abstract
    We propose a fully Lagrangian monolithic system for the simulation of the underwater implosion of cylindrical aluminum containers. A variationally stabilized form of the Lagrangian [...]

  • Comput. Methods Appl. Mech. Engrg., (2015). Vol. 291; pp. 173-196

    Abstract
    In this work the Reduced-Order Subscales for Proper Orthogonal Decomposition models are presented. The basic idea consists in splitting the full-order solution into the part [...]

  • Int. J. Numer. Meth. Fluids (2014). Vol. 74 (10), pp. 732-748

    Abstract
    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 [...]

  • M. Mier-Torrecilla, A. Geyer, J. Phillips, S. Idelsohn, E. Oñate
    Int. J. Numer. Meth. Fluids (2011). Vol. 69 (5), pp. 1016-1030

    Abstract
    Negatively buoyant jets consist in a dense fluid injected vertically upward into a lighter ambient fluid. The numerical simulation of this kind of buoyancy‐driven flows [...]

  • J. Gimenez, H. Aguerre, S. Idelsohn, N. Nigro
    Journal of Computational Physics (2018). Vol. 380, pp. 295-310

    Abstract
      This work presents a novel proposal of a second-order accurate (in time and space) particle-based method for solving transport equations including incompressible [...]

  • Int. J. Numer. Meth. Fluids (2011). Vol. 70 (7), pp. 829-850

    Abstract
    In this work, a new enrichment space to accommodate jumps in the pressure field at immersed interfaces in finite element formulations, is proposed. The new enrichment adds [...]

  • R. Rossi, J. Cotela, N. Lafontaine, P. Dadvand, S. Idelsohn
    Computers and Fluids (2013). Vol. 80, pp. 342-355

    Abstract
    The present article describes a simple element-driven strategy for the conforming refinement of simplicial finite element meshes in a distributed environment. The proposed [...]

  • Adv. Model. and Simul. in Eng. Sci. (2018). Vol. 5, art. 28

    Abstract
    In this paper we present a collection of techniques used to formulate a projection-based reduced order model (ROM) for zero Mach limit thermally coupled Navier–Stokes [...]

  • Int. J. Numer. Meth. Fluids (2013). Vol. 72 (12), pp. 1219-1243

    Abstract
    In this paper, we present an explicit formulation for reduced‐order models of the stabilized finite element approximation of the incompressible Navier–Stokes equations. [...]

  • S. Idelsohn, J. Marti, P. Becker, E. Oñate
    Int. J. Numer. Meth. Fluids (2014). Vol. 75 (9), pp. 621-644

    Abstract
    Multifluids are those fluids in which their physical properties (viscosity or density) vary internally and abruptly forming internal interfaces that introduce a large nonlinearity [...]

  • J. Marti, E. Ortega, S. Idelsohn
    Int. J. of Num. Meths. for Heat and Fluid Flow (2017). Vol. 27 (8), pp.1748-1764

    Abstract
    Purpose   The purpose of this paper is to propose a new elemental enrichment technique to improve the accuracy of the simulations of thermal problems [...]

  • Adv. Model. and Simul. in Eng. Sci. (2016). Vol. 3, art 7

    Abstract
    Inhomogeneous essential boundary conditions must be carefully treated in the formulation of Reduced Order Models (ROMs) for non-linear problems. In order to investigate this [...]

  • R. Löhner, C. Yang, E. Oñate, S. Idelsohn
    Applied Numerical Mathematics (1999). Vol. 31 (3), pp. 271-293

    Abstract
    An unstructured grid-based, parallel-free surface solver is presented. The overall scheme combines a finite-element, equal-order, projection-type 3-D incompressible flow solver [...]

  • S. Costarelli, M. Storti, R. Paz, L. Dalcin, S. Idelsohn
    Cluster computing (2014). Vol. 17 (2), pp. 243-254

    Abstract
    In the present work an implementation of the Back and Forth Error Compensation and Correction (BFECC) algorithm specially suited for running on General-Purpose Graphics Processing [...]

  • A. Limache, S. Idelsohn
    Adv. Model. and Simul. in Eng. Sci. (2016). Vol. 3, art 13

    Abstract
    Discretization processes leading to numerical schemes sometimes produce undesirable effects. One potentially serious problem is that a discretization may produce the loss [...]

  • Computers and Fluids (2014). Vol. 89, pp. 53-65

    Abstract
    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, [...]

  • J. Gimenez, N. Nigro, S. Idelsohn
    Comp. Part. Mech. (2014). Vol. 1 (1), pp. 103-116

    Abstract
    This paper presents a high performance implementation for the particle-mesh based method called particle finite element method two (PFEM-2). It consists of a material derivative [...]

  • C. R. Mecanique (2018). Vol. 346 (7), pp. 539-555

    Abstract
    Highly concentrated moving nonlinearities are extremely difficult to solve numerically. The Selective Laser Melting Additive Manufacturing process [...]

  • E. Oñate, J. Marti, P. Ryzhakov, R. Rossi, S. Idelsohn
    (2013). Research Report, Nº PI395

    Abstract
    A computational procedure for analysis of the melting, burning and flame spread of polymers under fire conditions is presented. The method, termed Particle Finite Element [...]

  • J. D'Elía, M. Storti, S. Idelsohn
    Advances in Engineering Software (2000). Vol. 31 (5), pp. 347-353

    Abstract
    A closed form for the computation of the dipolar and monopolar influence coefficients related to a low-order panel method is shown. The flow problem is formulated by means [...]

  • Int. J. Computational Fluid Dynamics (2002). Vol. 16 (4), pp. 263-275

    Abstract
    A Lagrangian-type panel method in the time domain is proposed for potential flows with a moving free surface. After a spatial semi-discretization with a low-order scheme, [...]

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