Now showing items 1-20 of 20

  • A scalable parallel finite element framework for growing geometries: application to metal additive manufacturing 

    Miranda Neiva, Eric; Badia, Santiago; Martín Huertas, Alberto Francisco; Chiumenti, Michèle (John Wiley & sons, 2019-04)
    Article
    Restricted access - publisher's policy
    This work introduces an innovative parallel, fully-distributed finite element framework for growing geometries and its application to metal additive manufacturing. It is well-known that virtual part design and qualification ...
  • Assessing the impact of the CPU power-saving modes on the task-parallel solution of sparse linear systems 

    Aliaga, José Ignacio; Barreda, María; Dolz, Manuel F.; Martín Huertas, Alberto Francisco; Mayo, Rafael; Quintana Ortí, Enrique Salvador (Kluwer Academic Publishers, 2014-12-01)
    Article
    Restricted access - publisher's policy
    We investigate the benefits that an energy-aware implementation of the runtime in charge of the concurrent execution of ILUPACK—a sophisticated preconditioned iterative solver for sparse linear systems—produces on the ...
  • Balancing domain decomposition by constraints associated with subobjects 

    Badia, Santiago; Martín Huertas, Alberto Francisco; Nguyen, Hieu Trung (Elsevier, 2019-01)
    Article
    Restricted access - publisher's policy
    A simple variant of the BDDC preconditioner in which constraints are imposed on a selected set of subobjects (subdomain subedges, subfaces and vertices between pairs of subedges) is presented. We are able to show that the ...
  • Block recursive LU preconditioners for the thermally coupled incompressible inductionless MHD problem 

    Badia, Santiago; Martín Huertas, Alberto Francisco; Planas Badenas, Ramon (2013)
    External research report
    Open Access
    The thermally coupled incompressible inductionless magnetohydrodynamics (MHD) problem models the ow of an electrically charged fuid under the in uence of an external electromagnetic eld with thermal coupling. This system ...
  • Design, tuning and evaluation of parallel multilevel ILU preconditioners 

    Aliaga, José Ignacio; Bollhoefer, Matthias; Martín Huertas, Alberto Francisco; Quintana-Ortí, Enrique Salvador (2008)
    Conference lecture
    Restricted access - publisher's policy
    In this paper, we present a parallel multilevel ILU preconditioner implemented with OpenMP. We employ METIS partitioning algorithms to decompose the computation into concurrent tasks, which are then scheduled to threads. ...
  • Enhanced balancing Neumann-Neumann preconditioning in computational fluid and solid mechanics 

    Badia, Santiago; Martín Huertas, Alberto Francisco; Principe, Ricardo Javier (2012)
    External research report
    Open Access
    Manuscript submitted for publication in International Journal for Numerical Methods in Engineering. Under review.
  • FEMPAR: an object-oriented parallel finite element framework 

    Badia, Santiago; Martín Huertas, Alberto Francisco; Principe, Ricardo Javier (2018-04)
    Article
    Open Access
    FEMPAR is an open source object oriented Fortran200X scientific software library for the high-performance scalable simulation of complex multiphysics problems governed by partial differential equations at large scales, by ...
  • FEMPAR: Scaling Multi-Level Domain Decomposition up to the full JUQUEEN supercomputer 

    Martín Huertas, Alberto Francisco; Badia, Santiago; Principe, Ricardo Javier (2015)
    External research report
    Open Access
    In conjunction with this year's JUQUEEN Porting and Tuning Workshop, which is part of the PRACE Advanced Training Centres curriculum, JSC continued its series of BlueGene Extreme Scaling Workshops. Seven application teams ...
  • Implementation and scalability analysis of balancing domain decomposition methods 

    Badia, Santiago; Martín Huertas, Alberto Francisco; Principe, Ricardo Javier (2012)
    External research report
    Open Access
    Manuscript submitted for publication in SIAM Journal of Scientific Computing. Under Review.
  • Leveraging Task-Parallelism in Energy-Efficient ILU preconditioners 

    Aliaga, José Ignacio; Dolz Zaragozá, Manuel Francisco; Martín Huertas, Alberto Francisco; Mayo, Rafael; Quintana-Ortí, Enrique Salvador (Springer, 2012)
    Conference lecture
    Restricted access - publisher's policy
    We analyze the energy-performance balance of a task-parallel computation of an ILU-based preconditioner for the solution of sparse linear systems on multi-core processors. In particular, we elaborate a theoretical model ...
  • Leveraging task-parallelism in message-passing dense matrix factorizations using SMPSs 

    Martín Huertas, Alberto Francisco; Reyes, Ruyman; Badia Sala, Rosa Maria; Quintana Ortí, Enrique Salvador (2014-05)
    Article
    Open Access
    In this paper, we investigate how to exploit task-parallelism during the execution of the Cholesky factorization on clusters of multicore processors with the SMPSs programming model. Our analysis reveals that the major ...
  • 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
    Open Access
    In 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 ...
  • Multilevel balancing domain decomposition at extreme scales 

    Badia, Santiago; Martín Huertas, Alberto Francisco; Principe, Ricardo Javier (2016-01-01)
    Article
    Open Access
    © 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 ...
  • 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
    Restricted access - publisher's policy
    Edge (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 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
    Open Access
    In 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
    Restricted access - publisher's policy
    In 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 ...
  • Scalable solvers for complex electromagnetics problems 

    Badia, Santiago; Martín Huertas, Alberto Francisco; Olm Serra, Marc (2019-09)
    Article
    Restricted access - publisher's policy
    In 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. ...
  • Simulation of high temperature superconductors and experimental validation 

    Olm Serra, Marc; Badia, Santiago; Martín Huertas, Alberto Francisco (2019-04)
    Article
    Restricted access - publisher's policy
    In 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 ...
  • Symmetric rank-k update on clusters of multicore processors with SMPSs 

    Badia Sala, Rosa Maria; Labarta Mancho, Jesús José; Marjanovic, Vladimir; Martín Huertas, Alberto Francisco; Mayo, Rafael; Quintana-Ortí, Enrique Salvador; Reyes, Ruymán (IOS Press, 2011)
    Conference lecture
    Open Access
    We investigate the use of the SMPSs programming model to leverage task parallelism in the execution of a message-pas sing implementation of the symmetric rank- k update on clusters equipped with multicore processors. Our ...
  • The aggregated unfitted finite element method for elliptic problems 

    Badia, Santiago; Verdugo Rojano, Francesc; Martín Huertas, Alberto Francisco (2018-07)
    Article
    Restricted access - publisher's policy
    Unfitted finite element techniques are valuable tools in different applications where the generation of body-fitted meshes is difficult. However, these techniques are prone to severe ill conditioning problems that obstruct ...