Hannover 2016 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 5: Poster Session- Helmholtz Graduate School for Plasma Physics

P 5.31: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

Parallel ILU and Iterative Sparse Triangluar Solvers for Preconditioning in GENE — •Jürgen Bräckle and Thomas Huckle — Department of Informatics, Technical University of Munich, Boltzmannstr. 3, 85748 Garching, Munich, Germany

When solving large linear systems of equations Ax=b using iterative methods, we usually need to precondition the system to get fast convergence. The Incomplete LU-Factorization (ILU) is a preconditioner of good quality, but lacking parallelization capabilities. In this contribution, we combine ILU with the easy to parallelize concept of Sparse Approximate Inverse Preconditioners (SPAI) to iteratively compute an Incomplete LU-Factorization in parallel. These qualities are then shown in eigenvalue computations in the Plasma Turbulence Code Gene.