Print Email Facebook Twitter Improving multigrid for 3-D electro-magnetic diffusion on stretched grids Title Improving multigrid for 3-D electro-magnetic diffusion on stretched grids Author Jönsthövel, T.B. Oosterlee, C.W. Mulder, W.A. Date 2006-09-05 Abstract We evaluated multigrid techniques for 3D diffusive electromagnetism. The Maxwell equations and Ohm's law were discretised on stretched grids, with stretching in all coordinate directions. We compared standard multigrid to alternative multigrid approaches with linewise smoothing and semi-coarsening, both as a stand-alone solver and as a preconditioner. Although the number of iterations was small for some variants, none of the schemes showed grid-independent convergence rates on stretched grids. Subject electro-magneticsdiffusionmultigridcontrolled-source EM To reference this document use: http://resolver.tudelft.nl/uuid:df65da5c-e43f-47ab-b80d-2f8ee7f35464 Publisher Delft University of Technology; European Community on Computational Methods in Applied Sciences (ECCOMAS) ISBN 90-9020970-0 Source ECCOMAS CFD 2006: Proceedings of the European Conference on Computational Fluid Dynamics, Egmond aan Zee, The Netherlands, September 5-8, 2006 Part of collection Institutional Repository Document type conference paper Rights (c) 2006 The Author(s) Files PDF Jonsthovel.pdf 969.67 KB Close viewer /islandora/object/uuid:df65da5c-e43f-47ab-b80d-2f8ee7f35464/datastream/OBJ/view