Exploració per autor "Badia, Santiago"
Ara es mostren els items 36-55 de 61
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Nonlinear parallel-in-time Schur complement solvers for ordinary differential equations
Badia, Santiago; Olm Serra, Marc (2018-12)
Article
Accés obertIn this work, we propose a parallel-in-time solver for linear and nonlinear ordinary differential equations. The approach is based on an efficient multilevel solver of the Schur complement related to a multilevel time ... -
Numerical modelling and experimental validation in Selective Laser Melting
Chiumenti, Michele; Miranda Neiva, Eric; Salsi, Emilio; Cervera Ruiz, Miguel; Badia, Santiago; Moya, Joan; Chen, Zhuoer; Lee, Caroline; Davies, Christopher (2017-12)
Article
Accés obertIn this work a finite-element framework for the numerical simulation of the heat transfer analysis of additive manufacturing processes by powder-bed technologies, such as Selective Laser Melting, is presented. These kind ... -
Numerical modelling of heat transfer and experimental validation in powder-bed fusion with the virtual domain approximation
Miranda Neiva, Eric; Chiumenti, Michele; Cervera Ruiz, Miguel; Salsi, Emilio; Piscopo, Gabriele; Badia, Santiago; Martín Huertas, Alberto Francisco; Chen, Zhuoer; Lee, Caroline; Davies, Christopher (2020-01)
Article
Accés obertAmong metal additive manufacturing technologies, powder-bed fusion features very thin layers and rapid solidification rates, leading to long build jobs and a highly localized process. Many efforts are being devoted to ... -
On a general implementation of h- and p-adaptive curl-conforming finite elements
Olm Serra, Marc; Badia, Santiago; Martín Huertas, Alberto Francisco (2019-06)
Article
Accés obertEdge (or Nédélec) finite elements are theoretically sound and widely used by the computational electromagnetics community. However, its implementation, especially for high order methods, is not trivial, since it involves ... -
On an unconditionally convergent stabilized finite element approximation of resistive magnetohydrodynamics
Badia, Santiago; Codina, Ramon; Planas Badenas, Ramon (2010-11-16)
Report de recerca
Accés obertIn this work, we propose a new stabilized finite element formulation for the approximation of the resistive magnetohydrodynamics equations. The novelty of this formulation with respect to existing ones is the fact that ... -
On an unconditionally convergent stabilized finite element approximation of resistive magnetohydrodynamics
Badia, Santiago; Codina, Ramon; Planas Badenas, Ramon (2013-02)
Article
Accés obertIn this work, we propose a new stabilized finite element formulation for the approximation of the resistive magnetohydrodynamics equations. The novelty of this formulation is the fact that it always converges to the physical ... -
On discrete maximum principles for discontinuous Galerkin methods
Badia, Santiago; Hierro Fabregat, Alba (2015-04)
Article
Accés obertThe aim of this work is to propose a monotonicity-preserving method for discontinuous Galerkin (dG) approximations of convection–diffusion problems. To do so, a novel definition of discrete maximum principle (DMP) is ... -
On some time marching schemes for the stabilized finite element approximation of the mixed wave equation
Espinoza Román, Héctor Gabriel; Codina, Ramon; Badia, Santiago (2015-11)
Article
Accés obertIn this paper we analyze time marching schemes for the wave equation in mixed form. The problem is discretized in space using stabilized finite elements. On the one hand, stability and convergence analyses of the fully ... -
On stabilized finite element methods based on the Scott-Zhang projector: circumventing the inf-sup condition for the Stokes problem
Badia, Santiago (2012-11)
Article
Accés restringit per política de l'editorialIn this work we propose a stabilized nite element method that permits us to circumvent discrete inf-sup conditions, e.g. allowing equal order interpolation. The type of method we propose belongs to the family of symmetric ... -
On the design of discontinuous Galerkin methods for elliptic problems based on hybrid formulations
Codina, Ramon; Badia, Santiago (2012)
Report de recerca
Accés obertThe objective of this paper is to present a framework for the design of discontinuous Galerkin (dG) methods for elliptic problems. The idea is to start from a hybrid formulation of the problem involving as unknowns the ... -
On the scalability of inexact balancing domain decomposition by constraints with overlapped coarse/fine corrections
Badia, Santiago; Martín Huertas, Alberto Francisco; Principe, Ricardo Javier (2015-12)
Article
Accés obertIn this work, we analyze the scalability of inexact two-level balancing domain decomposition by constraints (BDDC) preconditioners for Krylov subspace iterative solvers, when using a highly scalable asynchronous parallel ... -
Physics-based balancing domain decomposition by constraints for multi-material problems
Badia, Santiago; Martín Huertas, Alberto Francisco; Nguyen, Hieu Trung (2019-05)
Article
Accés obertIn this work, we present a new variant of the balancing domain decomposition by constraints preconditioner that is robust for multi-material problems. We start with a well-balanced subdomain partition, and based on an ... -
Relaxing the roles of corners in BDDC by perturbed formulation
Badia, Santiago; Nguyen, Hieu Trung (Springer, 2017)
Capítol de llibre
Accés restringit per política de l'editorialThis book is a collection of papers presented at the 23rd International Conference on Domain Decomposition Methods in Science and Engineering, held on Jeju Island, Korea on July 6-10, 2015. Domain decomposition methods ... -
Robin-Robin preconditioned Krylov methods for fluid-structure interaction problems
Badia, Santiago; Nobell Rodríguez, Pablo; Vergara, Christian (2008-08-14)
Article
Accés obertIn this work we propose a Robin-Robin preconditioner combined with Krylov iterations for the solution of the interface system arising in fluid-structure interaction (FSI) problems. It can be seen as a partitioned FSI ... -
Robust and scalable domain decomposition solvers for unfitted finite element methods
Badia, Santiago; Verdugo Rojano, Francesc (2018-12)
Article
Accés obertUnfitted finite element methods, e.g., extended finite element techniques or the so-called finite cell method, have a great potential for large scale simulations, since they avoid the generation of body-fitted meshes and ... -
Scalable solvers for complex electromagnetics problems
Badia, Santiago; Martín Huertas, Alberto Francisco; Olm Serra, Marc (2019-09)
Article
Accés obertIn this work, we present scalable balancing domain decomposition by constraints methods for linear systems arising from arbitrary order edge finite element discretizations of multi-material and heterogeneous 3D problems. ... -
Segregated Runge-Kutta methods for the incompressible Navier-Stokes equations
Colomés Gené, Oriol; Badia, Santiago (John Wiley & Sons, 2016-02-03)
Article
Accés obertIn this work, we propose Runge-Kutta time integration schemes for the incompressible Navier-Stokes equations with two salient properties. First, velocity and pressure computations are segregated at the time integration ... -
Segregated Runge–Kutta time integration of convection-stabilized mixed finite element schemes for wall-unresolved LES of incompressible flows
Colomés Gené, Oriol; Badia, Santiago (2017-01)
Article
Accés obertIn this work, we develop a high-performance numerical framework for the large eddy simulation (LES) of incompressible flows. The spatial discretization of the nonlinear system is carried out using mixed finite element (FE) ... -
Shock capturing techniques for hp-adaptive finite elements
Hierro Fabregat, Alba; Badia, Santiago; Kus, Pavel (2016-09)
Article
Accés obertThe aim of this work is to propose an hp-adaptive algorithm for discontinuous Galerkin methods that is capable to detect the discontinuities and sharp layers and avoid the spurious oscillation of the solution around them. ... -
Simulation of high temperature superconductors and experimental validation
Olm Serra, Marc; Badia, Santiago; Martín Huertas, Alberto Francisco (2019-04)
Article
Accés obertIn this work, we present a parallel, fully-distributed finite element numerical framework to simulate the low-frequency electromagnetic behaviour of superconducting devices, which efficiently exploits high performance ...