Exploració per autor "Badia, Santiago"
Ara es mostren els items 29-48 de 61
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Maximum-principle preserving space–time isogeometric analysis
Bonilla de Toro, Jesús; Badia, Santiago (2019-09)
Article
Accés obertIn this work we propose a nonlinear stabilization technique for convection–diffusion–reaction and pure transport problems discretized with space–time isogeometric analysis. The stabilization is based on a graph-theoretic ... -
Mixed aggregated finite element methods for the unfitted discretization of the Stokes problem
Badia, Santiago; Martín Huertas, Alberto Francisco; Verdugo Rojano, Francesc (2018-12-18)
Article
Accés obertIn this work, we consider unfitted finite element methods for the numerical approximation of the Stokes problem. It is well-known that these kinds of methods lead to arbitrarily ill-conditioned systems and poorly approximated ... -
Mixed finite element methods with convection stabilization for the large eddy simulation of incompressible turbulent flows
Colomés Gené, Oriol; Badia, Santiago; Principe, Ricardo Javier (2016-06)
Article
Accés obertThe variational multiscale method thought as an implicit large eddy simulation model for turbulent flows has been shown to be an alternative to the widely used physical-based models. This method is traditionally combined ... -
Model problems in magneto-hydrodynamics: individual numerical challenges and coupling possibilities
Codina, Ramon; Badia, Santiago; Planas Badenas, Ramon (2011)
Text en actes de congrés
Accés obertIn this work we discuss two model problems appearing in magneto-hydrodynamics (MHD), namely, the so called full MHD problem and the inductionless MHD problem. The first involves as unknowns the fluid velocity and pressure, ... -
Model problems in magneto-hydrodynamics: individual numerical challenges and coupling possibilities
Codina, Ramon; Badia, Santiago; Planas Badenas, Ramon (CIMNE, 2011)
Text en actes de congrés
Accés obertIn this work we discuss two model problems appearing in magneto-hydrodynamics (MHD), namely, the so called full MHD problem and the inductionless MHD problem. The first involves as unknowns the fluid velocity and pressure, ... -
Monotonicity-preserving finite element schemes based on differentiable nonlinear stabilization
Badia, Santiago; Bonilla de Toro, Jesús (2017-01)
Article
Accés obertIn this work, we propose a nonlinear stabilization technique for scalar conservation laws with implicit time stepping. The method relies on an artificial diffusion method, based on a graph-Laplacian operator. It is nonlinear, ... -
Multilevel balancing domain decomposition at extreme scales
Badia, Santiago; Martín Huertas, Alberto Francisco; Principe, Ricardo Javier (2016-01-01)
Article
Accés obert© 2016 Society for Industrial and Applied Mathematics. In this paper we present a fully distributed, communicator-aware, recursive, and interlevel-overlapped message-passing implementation of the multilevel balancing domain ... -
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 ...