Exploració per autor "Martí, Julio Marcelo"
Ara es mostren els items 1-15 de 15
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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
Accés restringit per política de l'editorialPurpose: 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 finite element model for the simulation of the UL-94 burning test
Martí, Julio Marcelo; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2018-11)
Article
Accés obertThe 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 is a promising methodology for predicting ... -
A semi-explicit multi-step method for solving incompressible navier-stokes equations
Ryzhakov, Pavel; Martí, Julio Marcelo (Multidisciplinary Digital Publishing Institute, 2018-01)
Article
Accés obertThe 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 Unified arbitrary lagrangian-eulerian model for fluid-structure interaction problems involving flows in flexible channels
Ryzhakov, Pavel; Martí, Julio Marcelo; Dialamishabankareh, Narges (2022)
Article
Accés obertIn this work a finite element-based model for analyzing incompressible flows in flexible channels is presented. The model treats the fluid-solid interaction problem in a monolithic way, where the governing equations for ... -
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; Martí, Julio Marcelo; Carbonell Puigbó, Josep Maria; Ryzhakov, Pavel; Suárez Arroyo, Benjamín (Springer, 2011)
Capítol de llibre
Accés restringit per política de l'editorialWe 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 ... -
An enriched finite elements approach for multi-phase microsystems
Narváez Muñoz, Christian; Hashemi, Mohammad Reza; Ryzhakov, Pavel; Pons Prats, Jordi; Martí, Julio Marcelo (2023)
Text en actes de congrés
Accés restringit per política de l'editorialThis study presents an E-FEM/L-S approach for modeling fluid-fluid inter-face deformation in microsystems under electric fields. The approach treats the interface as a zero-thickness boundary and precisely models discontinuities ... -
An explicit/implicit Runge–Kutta-based PFEM model for the simulation of thermally coupled incompressible flows
Martí, Julio Marcelo; Ryzhakov, Pavel (Springer, 2020-01)
Article
Accés obertA 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 explicit–implicit finite element model for the numerical solution of incompressible Navier–Stokes equations on moving grids
Martí, Julio Marcelo; Ryzhakov, Pavel (2019-06)
Article
Accés obertIn this paper an efficient mesh-moving Finite Element model for the simulation of the incompressible flow problems is proposed. The model is based on a combination of the explicit multi-step scheme (Runge–Kutta) with an ... -
An improved enrichment method for weak discontinuities for thermal problems
Martí, Julio Marcelo; Ortega, Ernesto; Idelsohn Barg, Sergio Rodolfo (2017-07)
Article
Accés obertThe purpose of this paper is to propose a new elemental enrichment technique to improve the accuracy of the simulations of thermal problems containing weak discontinuities. Design/methodology/approach - The enrichment is ... -
Elemental enriched spaces for the treatment of weak and strong discontinuous fields
Idelsohn Barg, Sergio Rodolfo; Gimenez, Juan Marcelo; Martí, Julio Marcelo; Nigro, Norberto (2017-01)
Article
Accés obertThis paper presents a finite element that incorporates weak, strong and both weak plus strong discontinuities with linear interpolations of the unknown jumps for the modeling of internal interfaces. The new enriched space ... -
Fast fluid–structure interaction simulations using a displacement-based finite element model equipped with an explicit streamline integration prediction
Ryzhakov, Pavel; Martí, Julio Marcelo; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2017-03)
Article
Accés obertWe propose here a displacement-based updated Lagrangian fluid model developed to facilitate a monolithic coupling with a wide range of structural elements described in terms of displacements. The novelty of the model ... -
High heat resistance can be deceiving: dripping behavior of polyamide 4.6 in fire
Silva Diniz, Analice Turski; Martí, Julio Marcelo; Schartel, Bernhard (John Wiley & sons, 2023-05)
Article
Accés obertPolyamide 4.6 (PA46) is a high-heat-resistant polymer, but it has no dripping resistance under fire. Three commercial grades of PA46 are investigated under UL 94 vertical fire test conditions. Their performances are discussed ... -
Improving accuracy of the moving grid particle finite element method via a scheme based on Strang splitting
Martí, Julio Marcelo; Ryzhakov, Pavel (2020-09)
Article
Accés obertParticle finite element method (PFEM) is a computational tool suitable for simulating fluid dynamics problems characterized by presence of moving boundaries. In this paper a new version of the method for incompressible ... -
Solution of Navier–Stokes equations on a fixed mesh using conforming enrichment of velocity and pressure
Tanyildiz, Deniz Cagri; Martí, Julio Marcelo; Rossi, Riccardo (Springer, 2020-01)
Article
Accés obertSimulation of fluid flows of multi-materials is an intriguing topic in computational mechanics. Capturing the physics of the interface between different materials poses a challenge because of the discontinuities that may ... -
The particle finite element method for multi-fluid flows
Idelsohn Barg, Sergio Rodolfo; Mier Torrecilla, Mónica de; Martí, Julio Marcelo; Oñate Ibáñez de Navarra, Eugenio (Springer, 2011)
Capítol de llibre
Accés restringit per política de l'editorialThis paper presents the Particle Finite Element Method (PFEM) and its application to multi-fluid flows. Key features of the method are the use of a Lagrangian description to model the motion of the fluid particles (nodes) ...