Browsing by Author "Zlotnik, Sergio"
Now showing items 1-20 of 71
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A combined reduced order-full order methodology for the solution of 3D magneto-mechanical problems with application to magnetic resonance imaging scanners
(2020-01-01)
Article
Open AccessThe design of a new magnetic resonance imaging (MRI) scanner requires multiple numerical simulations of the same magneto-mechanical problem for varying model parameters, such as frequency and electric conductivity, in order ... -
A high order finite element formulation for the simulation of 3D Magneto-Mechanical problems with application to MRI scanners
(2019)
Conference report
Restricted access - publisher's policyTransient magnetic fields generated by the gradient coils in MRI scanners induce eddy currents in their conducting components, which lead to vibrations, imaging artefacts, noise and the dissipation of heat. Heat dissipation ... -
A Lagrangian–Eulerian finite element algorithm for advection–diffusion–reaction problems with phase change
(2016-03)
Article
Open AccessThis paper presents a particle-based Lagrangian–Eulerian algorithm for the solution of the unsteady advection–diffusion–reaction heat transfer equation with phase change. The algorithm combines a Lagrangian formulation for ... -
A multiparametric advection-diffusion reduced-order model for molecular transport in scaffolds for osteoinduction
(Springer Nature, 2022-05-05)
Article
Open AccessScaffolds are microporous biocompatible structures that serve as material support for cells to proliferate, differentiate and form functional tissue. In particular, in the field of bone regeneration, insertion of scaffolds ... -
A new tool-less layered fracturing technology and its pilot application in deep thick formations
(2016)
Conference report
Restricted access - publisher's policyMulti-layer fracturing technology is challenging because of the risk of packer failure and high cost in the deep thick formation. It depends largely on the effectiveness of packer tools. However, a new degradable fiber ... -
A nonintrusive reduced order method for the NVH assessment and automotive structural dynamics
(2021)
Conference report
Restricted access - publisher's policyThe goal of this work is to develop a computational method able to optimize the design process of a car structure and provide a tool which can support designers during the decision-making phase. The design of a car ... -
A numerical study on hydraulic fracturing problems via the proper generalized decomposition method
(2020-02-01)
Article
Open AccessThe hydraulic fracturing is a nonlinear, fluid-solid coupling and transient problem, in most cases it is always time-consuming to simulate this process numerically. In recent years, although many numerical methods were ... -
A Proper Generalized Decomposition (PGD) approach to crack propagation in brittle materials: with application to random field material properties
(Springer, 2020-02)
Article
Open AccessUnderstanding the failure of brittle heterogeneous materials is essential in many applications. Heterogeneities in materialproperties are frequently modeled through random fields, which typically induces the need to solve ... -
A reduced order approach for probabilistic inversions of 3-D magnetotelluric data I: general formulation
(2020-12)
Article
Open Access -
A reduced order approach for probabilistic inversions of 3D magnetotelluric data II: joint inversion of MT and surface-wave data
(2021-12)
Article
Open AccessJoint probabilistic inversions of magnetotelluric (MT) and seismic data have great potential for imaging the thermochemical structure of the lithosphere as well as mapping fluid/melt pathways and regions of mantle metasomatism. ... -
A stable XFEM formulation for multi-phase problems enforcing the accuracy of the fluxes through Lagrange multipliers
(2013-11-02)
Article
Open AccessWhen applied to diffusion problems in a multi-phase setup, the popular extended finite element method (XFEM) strategy suffers from an inaccurate representation of the local fluxes in the vicinity of the interface. The XFEM ... -
Algebraic PGD for tensor separation and compression: an algorithmic approach
(2018-07)
Article
Open AccessProper Generalized Decomposition (PGD) is devised as a computational method to solve high-dimensional boundary value problems (where many dimensions are associated with the space of parameters defining the problem). The ... -
An efficient and general approach for implementing thermodynamic phase equilibria information in geophysical and geodynamic studies
(2015-10-25)
Article
Open AccessWe present a flexible, general, and efficient approach for implementing thermodynamic phase equilibria information (in the form of sets of physical parameters) into geophysical and geodynamic studies. The approach is based ... -
An error estimator for real-time simulators based on model order reduction
(Springer, 2015-11-26)
Article
Open AccessModel order reduction (MOR) is one of the most appealing choices for real-time simulation of non-linear solids. In this work a method is presented in which real time performance is achieved by means of the o -line solution ... -
Analog and numerical experiments of double subduction systems with opposite polarity in adjacent segments
(2020-06-01)
Article
Open AccessIn this work we study the dynamics of double subduction systems with opposite polarity in adjacent segments. A combined approach of numerical and analog experiments allows us to compare results and exploit the strengths ... -
Anomalous subduction initiation: young under old oceanic lithosphere
(2021-05-17)
Article
Open AccessWhen subduction initiates along a transform fault, it is often interpreted that the older and therefore denser oceanic lithosphere should evolve into the downgoing plate. However, in the western Pacific, several geological ... -
Assembling sparse matrices in MATLAB
(2010)
Article
Restricted access - publisher's policyThe assembly of sparse matrices is a key operation in finite element methods. In this study we analyze several factors that may have an influence on the efficiency of the assembly procedure. Different insertion strategies ... -
Bonding performance of glass fiber-reinforced polymer bars under the influence of deformation characteristics
(Multidisciplinary Digital Publishing Institute (MDPI), 2023-06-07)
Article
Open AccessGlass fiber-reinforced polymer (GFRP) of high performance, as a relatively ideal partial or complete substitute for steel, could increase the possibility of adapting structures to changes in harsh weather environments. ... -
Building a certified reduced basis for coupled thermo-hydro-mechanical systems with goal-oriented error estimation
(Springer, 2020-09)
Article
Open AccessA goal-oriented a-posteriori error estimator is developed for transient coupled thermo-hydro-mechanical (THM) parametric problems solved with a reduced basis approximation. The estimator assesses the error in some specific ... -
Cell-DEVS modeling and simulation of artificial hydraulic fracturing of rocks in boreholes (WIP)
(Society for Computer Simulation International, 2018)
Conference report
Restricted access - publisher's policyHydraulic Fracturing is a technique used in the extraction and exploration of oil and gas. During hydraulic fracturing, a high-pressure fluid is injected into a wellbore; this fluid flows through some artificially made ...
