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Dive into the research topics where Gustavo Boroni is active.

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Featured researches published by Gustavo Boroni.


International Journal for Numerical Methods in Biomedical Engineering | 2018

A comparative study of porous medium CFD models for flow diverter stents: Advantages and shortcomings

Nicolás Dazeo; Javier Alejandro Dottori; Gustavo Boroni; Ignacio Larrabide

In computational fluid dynamics, there is a high interest in modeling flow diverter stents as porous media due to its reduced computational loads. One of the main difficulties of such models is proper parameter setup. Most authors assume flow diverters wire screen as an isotropic and homogeneous medium, while others proposes anisotropic configurations, yet very little is discussed about the effect of these assumptions on models accuracy. In this paper, we compare the effect of different models on hemodynamics in relation to their parameters. The fidelity and efficiency of the different models to capture wire screen effect on fluid flow are quantitatively analyzed and compared.


The International Journal of Multiphysics | 2017

FULL GPU Implementation of Lattice-Boltzmann Methods with Immersed Boundary Conditions for Fast Fluid Simulations

Gustavo Boroni; J Dottori; P Rinaldi

Lattice Boltzmann Method (LBM) has shown great potential in fluid simulations, but performance issues and difficulties to manage complex boundary conditions have hindered a wider application. The upcoming of Graphic Processing Units (GPU) Computing offered a possible solution for the performance issue, and methods like the Immersed Boundary (IB) algorithm proved to be a flexible solution to boundaries. Unfortunately, the implicit IB algorithm makes the LBM implementation in GPU a non-trivial task. This work presents a fully parallel GPU implementation of LBM in combination with IB. The fluid-boundary interaction is implemented via GPU kernels, using execution configurations and data structures specifically designed to accelerate each code execution. Simulations were validated against experimental and analytical data showing good agreement and improving the computational time. Substantial reductions of calculation rates were achieved, lowering down the required time to execute the same model in a CPU to about two magnitude orders.


12th International Symposium on Medical Information Processing and Analysis | 2017

Flow diverter stents simulation with CFD: porous media modelling

Nicols Dazeo; Javier Alejandro Dottori; Gustavo Boroni; Alejandro Clausse; Ignacio Larrabide

Intracranial aneurysm treatment with flow diverters stent (FDs) is a minimally invasive approach for use in human patients. Because this treatment is strongly related to blood flow, flow simulation by CFD is an attractive method to study FDs. Such flow simulations generally define geometries of aneurysms and stents in the computation by creating calculation meshes in the fluid space. For the other hand, generating a mesh in porous media (PM) sometimes represents a smaller computational load than generating realistic stent geometries with CFD, particularly for the small gaps between stent struts. For this reason, PMs become attractive to simulate FDs. To find the proper parameters, we investigated Darcy-Forchheimer model for porous media. The model describes the relation between the pressure drop and flow velocity considering a viscous permeability (linear models term), and an inertial permeability (quadratic models term). Finally, two stage studies were performed. First, we verified flow model validity at different angles in known flow conditions. Second, model validation was checked for a channel with no-slip boundary conditions. Results indicate that resistance calculated according to model has a difference of less than 3.5 % which is appropriate to characterize the FDs.


Mathematical Problems in Engineering | 2015

Downstream-Conditioned Maximum Entropy Method for Exit Boundary Conditions in the Lattice Boltzmann Method

Javier Alejandro Dottori; Gustavo Boroni; Alejandro Clausse

A method for modeling outflow boundary conditions in the lattice Boltzmann method (LBM) based on the maximization of the local entropy is presented. The maximization procedure is constrained by macroscopic values and downstream components. The method is applied to fully developed boundary conditions of the Navier-Stokes equations in rectangular channels. Comparisons are made with other alternative methods. In addition, the new downstream-conditioned entropy is studied and it was found that there is a correlation with the velocity gradient during the flow development.


Science and Technology of Nuclear Installations | 2011

Ludwig: A Training Simulator of the Safety Operation of a CANDU Reactor

Gustavo Boroni; Alejandro Clausse

This paper presents the application Ludwig designed to train operators of a CANDU Nuclear Power Plant (NPP) by means of a computer control panel that simulates the response of the evolution of the physical variables of the plant under normal transients. The model includes a close set of equations representing the principal components of a CANDU NPP plant, a nodalized primary circuit, core, pressurizer, and steam generators. The design of the application was performed using the object-oriented programming paradigm, incorporating an event-driven process to reflect the action of the human operators and the automatic control system. A comprehensive set of online graphical displays are provided giving an in-depth understanding of transient neutronic and thermal hydraulic response of the power plant. The model was validated against data from a real transient occurring in the Argentine NPP Embalse Rio Tercero, showing good agreement. However, it should be stressed that the aim of the simulator is in the training of operators and engineering students.


Archive | 2013

Real-Time Physical Engine for Floating Objects with Two-Way Fluid-Structure Coupling

Marcos Lazo; Cristian García Bauza; Gustavo Boroni; Alejandro Clausse


Latin American Applied Research | 2013

An improved immersed-boundary algorithm for fluid-solid interaction in Lattice-Boltzmann simulations

Gustavo Boroni; Javier Alejandro Dottori; Diego David Dalponte; Pablo Rafael Rinaldi; Alejandro Clausse


Journal of Applied Sciences | 2011

Object-oriented Programming Strategies for Numerical Solvers Applied to Continuous Simulation

Gustavo Boroni; Alejandro Clausse


Computers & Fluids | 2015

Lattice-Boltzmann modeling of unstable flows amid arrays of wires

Gustavo Boroni; Nicolás Silin; D. Dalponte; Javier Alejandro Dottori; Alejandro Clausse


X Workshop de Investigadores en Ciencias de la Computación | 2008

Modelo predictivo de comportamiento de barcos

Gustavo Boroni; Marcelo Vénere; Pablo A. Lotito; Alejandro Clausse; Osvaldo D. Martinetti; Oscar P. Grasso

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Alejandro Clausse

National Scientific and Technical Research Council

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Javier Alejandro Dottori

National Scientific and Technical Research Council

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Pablo A. Lotito

National Scientific and Technical Research Council

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Ignacio Larrabide

National Scientific and Technical Research Council

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Cristian García Bauza

National Scientific and Technical Research Council

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Marcos Lazo

National Scientific and Technical Research Council

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D. Dalponte

National Scientific and Technical Research Council

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Marcelo Vénere

National Scientific and Technical Research Council

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Nicols Dazeo

National Scientific and Technical Research Council

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Nicolás Silin

National Scientific and Technical Research Council

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