References of "Geuzaine, Christophe"
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Geuzaine, Christophe ULg

Scientific conference (2010, June 16)

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See detailHigh Quality Surface Meshing using Harmonic Maps
Geuzaine, Christophe ULg

Scientific conference (2010, June 09)

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See detailNon-linear magnetic model refinement via a finite element subproblem method
Dular, Patrick ULg; V Sabariego, Ruth ULg; Gyselinck, Johan et al

in Proceedings of the XXI Symposium on Electromagnetic Phenomena in Nonlinear Circuits (EPNC 2010) (2010, June)

Model refinements of non-linear magnetic circuits are performed via a finite element subproblem method. A complete problem is split into subproblems to allow a progression from 1- D to 3-D including ... [more ▼]

Model refinements of non-linear magnetic circuits are performed via a finite element subproblem method. A complete problem is split into subproblems to allow a progression from 1- D to 3-D including linear to non-linear model corrections. Its solution is then expressed as the sum of the subproblem solutions supported by different meshes. A convenient and robust correction procedure is proposed allowing independent overlapping meshes for both source and reaction fields. The procedure simplifies both meshing and solving processes, and quantifies the gain given by each model refinement on both local fields and global quantities. [less ▲]

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See detailPassive ACS of Delphi-C3 nanosatellite
François, V.; Hannay, S.; Geuzaine, Christophe ULg

in Proceedings of the URSI Forum 2010 (2010, May)

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See detailAnalyzing and Reducing Error in 2-D Frequency Domain Homogenization of Windings for R, L Parameters FE Computation
De Grève, Zacharie; Deblecker, Olivier; Lobry, Jacques et al

in Proceedings of the 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2010) (2010, May)

In this work, the error made by frequency domain homogenization of windings in 2-D magnetodynamics is quantified. To that end, the homogenized fields are combined with the analytical solutions (a) of eddy ... [more ▼]

In this work, the error made by frequency domain homogenization of windings in 2-D magnetodynamics is quantified. To that end, the homogenized fields are combined with the analytical solutions (a) of eddy currents flowing in a circular conductor placed in a uniform alternating magnetic induction (proximity effect) and (b) of current density in conductors with non-zero net current (skin effect). They are then compared to the fields from the fine model, taken as reference. It is shown that error on resistance can reach 10\% at high frequencies for magnetic components with a limited number of turns. Procedures to improve winding R, L parameters estimation from homogenized solution are introduced. [less ▲]

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See detailCorrection of Thin Shell Finite Element Magnetic Models via a Subproblem Method
Dular, Patrick ULg; Dang, Quoc Vuong ULg; V Sabariego, Ruth ULg et al

in Proceedings of the 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2010) (2010, May)

A sub-problem finite element method is developed for correcting the inaccuracies near edges and corners inherent to thin shell models, for both magnetostatic and magnetodynamic problems. A thin shell ... [more ▼]

A sub-problem finite element method is developed for correcting the inaccuracies near edges and corners inherent to thin shell models, for both magnetostatic and magnetodynamic problems. A thin shell solution, supported by a simplified mesh near the thin structures, serves as a source of a correction problem with the actual volumic thin regions alone in a homogeneous medium, concentrating the meshing effort on the thin regions only. Improvements of local fields are efficiently achieved and allow accurate force and loss calculations. [less ▲]

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See detailCombining Surface Impedance Boundary Conditions with Volume Discretisation in Time-Domain Finite-Element Modeling
Gyselinck, Johan; Dular, Patrick ULg; Geuzaine, Christophe ULg et al

in Proceedings of the 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2010) (2010, May)

In this paper a hybrid approach for considering massive conducting regions in time-domain finite-element modeling is presented. Surface impedance boundary conditions, developed in the time domain as ... [more ▼]

In this paper a hybrid approach for considering massive conducting regions in time-domain finite-element modeling is presented. Surface impedance boundary conditions, developed in the time domain as previously proposed by the authors, are adopted so as to allow for high-frequency flux components (in a certain frequency band) without the need for very fine discretisation of the conducting region near its surface. These surface conditions are combined with a coarse FE mesh inside the region for conveying slowly varying flux components. The correct impedance behaviour can thus be obtained in a wide frequency range, from DC flux on. The approach is briefly demonstrated by means of a simple 1D test case. [less ▲]

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See detailA model reduction algorithm for solving multiple scattering problems using iterative methods
Vion, Alexandre ULg; V Sabariego, Ruth ULg; Geuzaine, Christophe ULg

in Proceedings of the 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2010) (2010, May)

This paper presents a new method for solving scattering problems by multiple objects. A model reduction algorithm based on the Macro Basis Functions (MBFs) method is used to find an approximate solution ... [more ▼]

This paper presents a new method for solving scattering problems by multiple objects. A model reduction algorithm based on the Macro Basis Functions (MBFs) method is used to find an approximate solution within a subspace of solutions, that are the solutions of several single scattering subproblems. Different iterative methods for the generation of the MBFs are compared. The whole process relies on a finite element approach and is applied to convex obstacles scattering. [less ▲]

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See detailHigh Performance Algorithms for High-Order High-Frequency Electromagnetic Scattering
Geuzaine, Christophe ULg

Scientific conference (2010, April 28)

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See detailHigh-Quality Remeshing using Harmonic Maps
Geuzaine, Christophe ULg

Scientific conference (2010, March 30)

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See detailRefinement of Inductor Models via a Subproblem Finite Element Method
Dular, Patrick ULg; Ferreira da Luz, Mauricio V.; Kuo-Peng, Patrick et al

in Proceedings of the 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2010) (2010)

A sub-problem finite element method is developed for refining the inductor models in magnetic circuits. It applies electrokinetic, magnetostatic and magnetodynamic models on progressively more complicated ... [more ▼]

A sub-problem finite element method is developed for refining the inductor models in magnetic circuits. It applies electrokinetic, magnetostatic and magnetodynamic models on progressively more complicated geometries and different components of the solution, supported by different meshes. It allows an efficient and robust analyze of magnetic circuits in any frequency range, with an accurate calculation of Joule losses and forces in inductors. [less ▲]

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See detailFinite-Element Analysis of a Shielded Pulsed-Current Induction Heater -- Experimental Validation of a Time-Domain Thin-Shell Approach
V Sabariego, Ruth ULg; Sergeant, Peter; Gyselinck, Johan et al

in COMPEL (2010), 29(6), 1585-1595

Purpose – The aim of this paper is the experimental validation of an original time-domain thin-shell formulation. The numerical results of a three-dimensional thin-shell model are compared with the ... [more ▼]

Purpose – The aim of this paper is the experimental validation of an original time-domain thin-shell formulation. The numerical results of a three-dimensional thin-shell model are compared with the measurements performed on a heating device at different working frequencies. Design/methodology/approach – A time-domain extension of the classical frequency-domain thin-shell approach is used for the finite-element analysis of a shielded pulse-current induction heater. The time-domain interface conditions at the shell surface are expressed in terms of the average flux density vector in the shell, as well as in terms of a limited number of higher-order components. Findings – A very good agreement between measurements and simulations is observed. A clear advantage of the proposed thin-shell approach is that the mesh of the computation domain does not depend on the working frequency anymore. It provides a good compromise between computational cost and accuracy. Indeed, adding a sufficient number of induction components, a very high accuracy can be achieved. Originality/value – The method is based on the coupling of a time-domain 1D thin-shell model with a magnetic vector potential formulation via the surface integral term. A limited number of additional unknowns for the magnetic flux density are incorporated on the shell boundary. [less ▲]

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See detailMagnetic model refinement via a coupling of finite element subproblems
Dular, Patrick ULg; V Sabariego, Ruth ULg; Krähenbühl, Laurent et al

in Proceedings of Scientific Computing in Electrical Engineering (SCEE 2010) (2010)

Model refinements of magnetic circuits are performed via a subdomain finite element method. A complete problem is split into subproblems with overlap- ping meshes, to allow a progression from source to ... [more ▼]

Model refinements of magnetic circuits are performed via a subdomain finite element method. A complete problem is split into subproblems with overlap- ping meshes, to allow a progression from source to reaction fields, ideal to real flux tubes, 1-D to 3-D models, perfect to real materials, statics to dynamics, with any coupling of these changes. Its solution is then the sum of the subproblem solutions. The procedure simplifies both meshing and solving processes, and quantifies the gain given by each refinement on both local fields and global quantities. [less ▲]

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See detailIterative solution of high-frequency multiple-scattering problems using finite elements
Geuzaine, Christophe ULg; Vion, Alexandre ULg; V Sabariego, Ruth ULg

in Proceedings of the IVth European Conference on Computational Mechanics (ECCM 2010) (2010)

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See detailDual approach for an accurate estimation of pull-in voltage
Rochus, Véronique ULg; Lemaire, Etienne ULg; Geuzaine, Christophe ULg

in Proceedings of the IVth European Conference on Computational Mechanics (ECCM 2010) (2010)

Detailed reference viewed: 28 (21 ULg)
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See detailMéthode de Galerkin discontinue appliqué à la diffusion non linéaire dans les supraconducteurs
Kameni Ntichi, Abelin ULg; Lambrechts, J.; Remacle, J.-F. et al

in Proceedings of the 40e Congrès National d'Analyse Numérique (CANUM 2010) (2010)

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See detailA model reduction algorithm for solving multiple scattering problems at high-frequencies
Geuzaine, Christophe ULg

in Proceedings of the Frontiers in Applied and Computational Mathematics (FACM '10) conference (2010)

Detailed reference viewed: 28 (10 ULg)
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See detailHigh quality meshing with harmonic maps
Marchandise, E.; Remacle, J.-F.; Geuzaine, Christophe ULg

in Proceedings of the IVth European Conference on Computational Mechanics (ECCM 2010) (2010)

Detailed reference viewed: 15 (4 ULg)
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See detailHigh-order stochastic integral equation scheme for wave scattering problems with random impedance boundary conditions
Geuzaine, Christophe ULg; Gaignaire, R.; Bruno, O.

in Proceedings of the IVth European Conference on Computational Mechanics (ECCM 2010) (2010)

Detailed reference viewed: 14 (7 ULg)