At the German Aerospace Center (DLR), the parallel simulation systems TAU and TRACE have been developed for the aerodynamic design of aircrafts or turbines for jet engines. Large-scale computing resources allow more detailed numerical investigations with bigger numerical configurations. Up to 50 million grid points in a single simulation are becoming a standard configuration in the industrial design. Both CFD solvers, TAU and TRACE, require the parallel solution of large, sparse real or complex systems of linear equations. For the parallel iterative solution of these equation systems, various block-local preconditioners are compared with a global two-level incomplete factorization preconditioning method for real or complex matrix problems. The two-level preconditioner is based on an improved distributed Schur complement ansatz. Compared with the original Schur complement method, it significantly saves incomplete factorization operations. Numerical, performance and scalability results of preconditioned FGMRes algorithms are presented for typical TAU and TRACE problems from external or internal flow simulations on many-core systems.


    Access

    Download


    Export, share and cite



    Title :

    Scalable Two-Level Preconditioners for CFD Computations on Many-Core Systems


    Contributors:

    Conference:

    2012 ; London, England


    Publication date :

    2012-06-28


    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Block Distributed Schur Complement Preconditioners for CFD Computations on Many-Core Systems

    Basermann, Achim / Zöllner, Melven | German Aerospace Center (DLR) | 2012

    Free access

    Scalable Preconditioned Solvers for Internal and External Flow Computations on Many-Core Systems

    Basermann, Achim / Kersken, Hans-Peter / Zöllner, Melven | German Aerospace Center (DLR) | 2011

    Free access


    Scalable Distributed Schur Complement Solvers for Internal and External Flow Computations on Many-Core Architectures

    Basermann, Achim / Kersken, Hans-Peter | German Aerospace Center (DLR) | 2011

    Free access

    New Block Distributed Schur Complement Preconditioners for CFD Simulation on Many-Core Architectures

    Basermann, Achim / Zöllner, Melven | German Aerospace Center (DLR) | 2012

    Free access